柴达木西北缘大通沟南山北闪长岩年代学、地球化学特征及其地质意义
作者：
刘军;息朝庄;黄波;杨涛;夏浩东;...
期刊：
西北地质 ,2022年55(2):93-105 ISSN：1009-6248
作者机构：
[刘军] 西安西北有色物化探总队有限公司;[息朝庄] 湖南城市学院土木工程学院;[黄波] 贵州省有色金属和核工业地质勘查局物化探总队;[杨涛] 贵州理工学院建筑与城乡规划学院;[邓会娟; 夏浩东] 中国地质调查局自然资源实物地质资料中心
关键词：
大通沟南山北;闪长岩;年代学;地球化学;柴达木西北缘
摘要：
大通沟南山北闪长岩岩体位于柴达木地块西北缘,岩石类型为石英闪长岩、闪长岩、花岗闪长岩,具有高硅、富碱、富铝、贫钛特征。A/CNK值为1.52~1.57,均大于1.10,为强过铝质花岗岩;轻稀土富集,重稀土亏损,具负Eu异常,标准化曲线呈明显的右倾型;富集Rb、Th、K等大离子亲石元素和轻稀土元素,相对亏损Nb、Ti、Y、Yb等高场强元素,Sr、P、Ti元素呈“V”型谷,具有明显亏损。通过对地球化学研究,表明岩浆来源于以砂屑岩为主的壳幔混合源,岩体成因类型属Ⅰ-型花岗岩;LA-ICP-MS锆石U-Pb定年结果为(270±3)Ma(MSWD=0.076),系早—中二叠世岩浆活动的产物,形成于俯冲环境下的岛弧花岗岩。
语种：
中文
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The road traffic safety risk projection based on improved random forest
作者：
Gong, B.B.
期刊：
Advances in Transportation Studies ,2022年2(Special Issue):133-144 ISSN：1824-5463
通讯作者：
Gong, B.B.(24148408@qq.com)
作者机构：
[Gong, B.B.] College of Civil Engineering, Hunan City University, YiYang;413000, China;Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground infrastructure, YiYang;[Gong, B.B.] 413000, China<&wdkj&>Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground infrastructure, YiYang;[Gong, B.B.] 413000, China
通讯机构：
[Gong, B.B.] C;College of Civil Engineering, China
关键词：
Grey gm(1,N) model;Improving random forest;Risk projection;Road traffic safety;Similarity measure
摘要：
Traditional road safety prediction methods have low recall rate and poor prediction accuracy. This paper proposes a road traffic safety risk prediction method based on improved random forest. First, collect road traffic data, such as static data, traffic dynamic data, other traffic related data and accident data. Then, the abnormal road traffic data are identified based on chaos method, and the abnormal data are repaired with grey GM (1, n) model. Finally, the random forest algorithm is improved by optimizing the similarity measurement method and the optimal addition principle, and the improved random forest algorithm is used to predict the road traffic safety risk. The results show that the maximum recall rate of this method is 95%, and the prediction accuracy of road traffic safety risk is 93%. © 2022, Aracne Editrice. All rights reserved.
语种：
英文
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Characteristics Analysis and Equilibrium Optimization of Mixed Traffic Flow considering Connected Automated and Human-Driven Vehicles
作者：
Zhou, Zhaoming;Yuan, Jianbo;Zhou, Shengmin;Long, Qiong;Cai, Jianrong;...
期刊：
Journal of Advanced Transportation ,2022年2022 ISSN：0197-6729
通讯作者：
Yuan, J.
作者机构：
School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, China;College of Civil Engineering, Hunan City University, Yiyang, China;Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road and Traffic Safety of Ministry of Education, Changsha University of Science and Technology, Changsha, China;Xiangtan Technology Research Center of Urban Planning Information, Xiangtan, China
通讯机构：
School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, China
摘要：
Considering the impact of informatization condition, vehicles on the road network are divided into connected automated vehicles (CAVs) and human-driven vehicles (HDVs), which follow the principle of system optimization and stochastic user equilibrium, respectively. Taking the road network reserve capacity maximization model under the condition of road capacity constraint as the upper-level programming and the traffic assignment model under heterogeneous flow environment as the lower level programming, then a bilevel programming model is constructed. Among them, the nonuniform demand growth multiplier is adopted for each OD pair to reflect the inconsistency of traffic demand structure growth, and the calculation of link capacity is related to the market penetration of CAVs. The incremental method, method of successive averages, and simulated annealing algorithm are used to solve the model, and the effects of different market penetration on road network capacity, travel time, and saturation are analyzed through a numerical example. The relevant data under different weights are normalized and the optimal deployment scheme of CAVs and HDVs in different periods is obtained by comprehensive evaluation. Meanwhile, the mixed equilibrium flow state is explored under the premise of given market penetration to verify the feasibility of the model and algorithm. © 2022 Zhaoming Zhou et al.
语种：
英文
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Fine grid model for the dielectric characteristics of ground-penetrating radar in mixed media
作者：
Ling, Tonghua;He, Wenchao;Liu, Xianjun;Zhang, Sheng;Huang, Fu;...
期刊：
Geophysical Prospecting ,2022年70(6):1052-1065 ISSN：0016-8025
通讯作者：
He, Wenchao(hewenchao1224@stu.csust.edu.cn)
作者机构：
[Ling, Tonghua; Liu, Xianjun; He, Wenchao; Huang, Fu; Hua, Fei] Changsha Univ Sci & Technol, Coll Civil Engn, Changsha 410114, Peoples R China.;[Zhang, Sheng] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Wenchao He] C;College of Civil Engineering, Changsha University of Science and Technology, Changsha, 410114 China
关键词：
Ground-penetrating radar;Finite difference methods;Numerical modelling;Signal processing;Wavelet
摘要：
The Fisher–Yates random shuffling algorithm combined with the finite-difference time-domain method is proposed to construct a fine grid model for the forward simulation of ground-penetrating radar in mixed media. First, the finite-difference time-domain method was used to divide the coarse grid model into several fine grid models by conforming to the boundary conditions of different media, and the corresponding dielectric parameters were assigned to Yee cells in each fine grid model. Then, the Fisher–Yates random shuffling algorithm was used to randomly scramble all Yee cells with equal probability, and the array of scrambled Yee cells was recombined into a coarse grid model. Finally, the geoelectric model of mixed media was generated with the finite-difference time-domain method, and a ground-penetrating radar image excited by electromagnetic wave pulses was obtained. To explore the characteristic signals and dielectric properties of the ground-penetrating radar electromagnetic response in mixed media, image entropy theory was used to describe the ground-penetrating radar image, and waveform analysis and wavelet transform mode maximum methods were used to analyse the single-channel ground-penetrating radar signal of the mixed media. The results showed that the Fisher–Yates random shuffling–finite-difference time-domain method can be used to construct a valid and stable fine grid model for simulating ground-penetrating radar in mixed media. The model effectively inhibits electromagnetic attenuation and energy dissipation, and the wavelet transform mode maximum method explains the relative dielectric permittivity distribution of the mixed media. The findings of this study can be used as a theoretical basis for correcting radar parameters and interpreting images when ground-penetrating radar is applied to mixed media. © 2022 European Association of Geoscientists & Engineers.
语种：
英文
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土木工程专业开展大学课程思政的教学改革与实践探索
作者：
胡张齐;陈桃花;贺冉;刘劲;蔡建荣
期刊：
进展：教学与科研 ,2022年(7):95-97 ISSN：1002-1221
作者机构：
湖南城市学院土木工程学院;益阳市中心医院院办;湖南省建设科技产学研结合双创平台
关键词：
课程思政;爱国主义教育;数据真实性;严谨治学;立德树人;土木工程专业;职业操守;数据处理能力
摘要：
本文以我校土木工程检测技术这门土木工程专业课为例,介绍了土木工程蕴含的思政元素,通过合理的教学思政元素设计,在理论课堂融入相关实际案例,实践环节要求数据真实性,以此对学生进行爱国主义教育、职业操守教育,并培养学生严谨治学的精神,配合实际检测活动,进一步增强学生的动手能力、数据处理能力等,真正做到学以致用,实现了课程思政与专业课程的有机结合,为土木工程专业学生实现立德树人提供参考。
语种：
中文
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首座跨海高铁斜拉桥承台温控设计研究
作者：
许平华;李星新;阳逸鸣;袁里
期刊：
湖南城市学院学报(自然科学版) ,2022年31(5):13-17 ISSN：1672-7304
作者机构：
[许平华] 中铁十一局集团有限公司;湖南城市学院土木工程学院;[袁里] 湖南未来桥科技有限公司;[阳逸鸣; 李星新] 湖南城市学院
关键词：
跨海高铁斜拉桥;大体积混凝土;温控设计
摘要：
为防止处于高盐湿热海洋环境下的大体积混凝土浇注开裂,以首座跨海高铁斜拉桥为研究对象,通过设计优化混凝土配合比,建立了计算模型研究了大体积混凝土温控发展规律.结果表明:当P.O42.5水泥含量由310 kg降至280 kg及粉煤灰由125 kg增至142 kg后,混凝土抗压强度略有降低,且水化热绝热温升下降了5℃;基于有限元模型并结合绝热温升和热源函数计算公式,计算所得到混凝土内部最高温度值和温差值,与实测结果相比,偏差在2℃以内.
语种：
中文
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比较基于化整交融应力拓扑优化诸解法的效果
作者：
彭细荣;隋允康;叶红玲;铁军
期刊：
力学学报 ,2022年54(2):459-470 ISSN：0459-1879
作者机构：
[彭细荣] 湖南城市学院土木工程学院;[叶红玲; 隋允康] 北京工业大学材料与制造学部;[铁军] 天津财经大学理工学院
关键词：
应力拓扑优化;化整交融;Kreisselmeier-Steinhauser函数;ICM法
摘要：
由于单元应力属于局部性能约束,导致相应的结构拓扑优化存在难以承受的大量约束条件;尽管化整方法极大地减少了约束数量,但是优化结果中有少数应力超限现象.为此,本文在应力约束的结构拓扑优化中,瞄准克服应力超限和提高求解效率两个目标,进行了探索.提出了乘子法及序列二次规划（SQP）法两种解法,首先在化整交融（即化整-集成）解法中的m方集成模型应用,与一阶近似的移动渐近线（MMA）解法进行了求解效率对比.然后,在此基础上采用了效果最好的m方集成模型的SQP解法,建立了求解应力约束下结构体积极小化模型（即s方模型）,将化整交融解法与以往单独的化整解法进行了对比.结果表明:（1） m方集成模型的3种解法中,乘子法及SQP法的求解效率远高于MMA法, SQP法的求解效率略高于乘子法;（2）化整交融解法与化整解法相比,虽然求解效率相当,但化整交融解法完全避免了个别约束超限的现象,在满足应力约束条件下,得到的最优拓扑结构体积更小,表现出更强的寻优能力.
语种：
中文
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湘西西安钨矿床白钨矿的地球化学特征及对矿床成因的指示
作者：
文静;胡阿香;彭建堂
期刊：
地质论评 ,2022年68(5):1772-1788 ISSN：0371-5736
作者机构：
[文静] 湖南有色金属职业技术学院资源环境系;[胡阿香] 湖南城市学院土木工程学院;[彭建堂] 中国科学院地球化学研究所
关键词：
白钨矿;微量元素;Sr—Nd同位素;矿床成因;西安钨矿床
摘要：
赋存于变质岩中的层控(层状)型钨矿床的成因在国际矿床学界一直存在争议,白钨矿的元素和同位素地球化学研究是解决其成因争议的有效手段。位于雪峰弧形构造带中的西安钨矿床是该类矿床的典型代表,其矿床成因也存在着很大争议。本文利用EMPA、ICP-MS、ID-MS等多种分析手段,对该矿白钨矿的主量元素、微量元素、及Sm-Nd和Sr同位素进行了研究。研究表明,该区白钨矿中CaO含量小于其理论值,这可能与热液流体中的REE、Sr、Pb、Ba等元素与白钨矿中的Ca发生类质同象置换有关;该区白钨矿微量元素组成具有富Sr、而亏损Mo、Bi、 Sn、Nb、Ta等特征,类似于西澳绿岩带型金矿、云南大坪和湘西沃溪等造山型金矿床中的白钨矿,其Mo含量和Sr/Mo值均显示其具变质热液成因特征,而与岩浆热液无关;该区白钨矿的稀土元素配分模式相当一致,均表现为LREE亏损、HREE相对富集、MREE最为富集的特征,其分配行为主要表现为REE3+与Na~+以电价补偿形式替代Ca~(2+)而选择性进入白钨矿晶格中;该区白钨矿n(~(87)Sr)/n(~(86)Sr)测定值为0.75412~0.78231,表明形成该区白钨矿的成矿流体并非来自海水或岩浆热液,其矿床成因也并非前人所认为的“海底热泉(卤水)沉积成因”、“海底同生喷流沉积成因”或“岩浆期后热液成因”。在LREE—MREE—HREE三角判别图解中,西安矿区白钨矿样品点均落入加拿大、澳大利亚和湘西造山型金矿区域,明显不同于与岩浆活动有关的钨矿床,该矿是属于造山型钨矿;在Sr—Nd同位素组成图解中,该区白钨矿与湘西一带出露的新元古代地层明显分布在不同区域,但部分样品点与华南最老地层—太古宇崆岭群重叠,暗示该矿成矿物质可能来自深部的太古宇崆岭群,而非来自赋矿的新元古界变质岩。
语种：
中文
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A Generalized Load-Transfer Modeling Framework for Tensioned Anchors Integrating Adhesion-Friction-Based Interface Model
作者：
Chen, Changfu;Zhu, Shimin;Zhang, Genbao;Morsy, Amr M.;Zornberg, Jorge G.;...
期刊：
International Journal of Geomechanics ,2022年22(5) ISSN：1532-3641
通讯作者：
Zhang, GB
作者机构：
[Zhu, Shimin; Mao, Fengshan; Chen, Changfu] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.;[Zhang, Genbao; Zhang, GB] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Hunan, Peoples R China.;[Morsy, Amr M.] Loughborough Univ, Sch Architecture Bldg & Civil Engn, Loughborough LE11 3TU, Leics, England.;[Zornberg, Jorge G.] Univ Texas Austin, Dept Civil Architectural & Environm Engn, Austin, TX 78712 USA.
通讯机构：
[Zhang, GB ] H;Hunan City Univ, Coll Civil Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Element anchoring interface;Interface bond-slip model;Load-transfer modeling framework;Pullout response;Tensioned anchors
摘要：
The load-transfer mechanism of tensioned anchors is primarily concerned with in-service performance, which depends on the bond-slip behavior of anchoring interface. Because the interface bond-slip behavior is conventionally modeled using epistemic experience of specific researchers and/or back analysis of specific in situ testing results, it is challenging to develop a straightforward load-transfer analysis with extensive applicability. A generalized load-transfer modeling framework was implemented in this work by incorporating a versatile interface bond-slip model that can be derived from experimental characterization of respective types of element-anchoring interface. The adhesion and friction were modeled with interface slip to constitute the interface bond using rational and exponential functions, respectively. The pullout tests on element-scale and large-scale specimens of a typical anchor type (i.e., tensioned steel tube embedded in cemented soils) were carried out to calibrate the parameters of the interface model and to validate the predicting capability of the modeling framework, respectively. In addition, the versatility of this load-transfer modeling framework was examined for two other anchor types reported in the literature (i.e., tensioned rock anchor and tensioned GFRP anchor embedded in sands). The consistent good agreements between predictions and measurements of these anchor types verified the effectiveness and applicability of the generalized load-transfer modeling framework. Based on the load-transfer analysis for the tensioned steel tube in model testing, a parametric study was performed to investigate the impact of axial stiffness and bond length on load-transfer responses of the tensioned anchor. © 2022 American Society of Civil Engineers.
语种：
英文
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Performance Prediction of Cement Stabilized Soil Incorporating Solid Waste and Propylene Fiber
作者：
Zhang, Genbao;Ding, Zhiqing;Wang, Yufei;Fu, Guihai;Wang, Yan;...
期刊：
Materials ,2022年15(12):4250- ISSN：1996-1944
通讯作者：
Yufei Wang<&wdkj&>Xiangyu Wang
作者机构：
[Zhao, Xiangming; Lu, Xinyuan; Wang, Yan] School of Architectural Engineering, Nanjing Institute of Technology, Nanjing 211167, China;[Zhang, Yu] General Contracting Company of CCFED, Changsha 410000, China;[Zhang, Genbao; Fu, Guihai] College of Civil Engineering, Hunan City University, Yiyang 413000, China;Authors to whom correspondence should be addressed.;School of Design and Built Environment, Curtin University, Perth, WA 6102, Australia
通讯机构：
[Yufei Wang; Xiangyu Wang] A;Authors to whom correspondence should be addressed.<&wdkj&>School of Design and Built Environment, Curtin University, Perth, WA 6102, Australia
关键词：
cement stabilized soil;fiber-reinforced soil;mechanical strength;waste utilization;Back Propagation Neural Network;Random Forest;beetle antennae search
摘要：
Cement stabilized soil (CSS) yields wide application as a routine cementitious material due to cost-effectiveness. However, the mechanical strength of CSS impedes development. This research assesses the feasible combined enhancement of unconfined compressive strength (UCS) and flexural strength (FS) of construction and demolition (C&D) waste, polypropylene fiber, and sodium sulfate. Moreover, machine learning (ML) techniques including Back Propagation Neural Network (BPNN) and Random Forest (FR) were applied to estimate UCS and FS based on the comprehensive dataset. The laboratory tests were conducted at 7-, 14-, and 28-day curing age, indicating the positive effect of cement, C&D waste, and sodium sulfate. The improvement caused by polypropylene fiber on FS was also evaluated from the 81 experimental results. In addition, the beetle antennae search (BAS) approach and 10-fold cross-validation were employed to automatically tune the hyperparameters, avoiding tedious effort. The consequent correlation coefficients (R) ranged from 0.9295 to 0.9717 for BPNN, and 0.9262 to 0.9877 for RF, respectively, indicating the accuracy and reliability of the prediction. K-Nearest Neighbor (KNN), logistic regression (LR), and multiple linear regression (MLR) were conducted to validate the BPNN and RF algorithms. Furthermore, box and Taylor diagrams proved the BAS-BPNN and BAS-RF as the best-performed model for UCS and FS prediction, respectively. The optimal mixture design was proposed as 30% cement, 20% C&D waste, 4% fiber, and 0.8% sodium sulfate based on the importance score for each variable. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
语种：
英文
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Analytical Reliability Evaluation Framework of Three-Dimensional Engineering Slopes
作者：
Zhang, Genbao;Zhu, Jianfeng;Chen, Changfu;Tang, Renhua;Zhu, Shimin;...
期刊：
Buildings ,2022年12(3) ISSN：2075-5309
通讯作者：
Zhu, JF
作者机构：
[Zhang, Genbao; Luo, Xiao] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.;[Zhang, Genbao] Hunan Engn Res Ctr Struct Safety & Disaster Preve, Yiyang 413000, Peoples R China.;[Zhu, Jianfeng; Zhu, JF] Zhejiang Univ Sci & Technol, Coll Civil Engn & Architecture, Hangzhou 310023, Peoples R China.;[Zhu, Shimin; Chen, Changfu] Hunan Univ, Minist Educ, Key Lab Bldg Safety & Energy Efficiency, Changsha 410082, Peoples R China.;[Zhu, Shimin; Chen, Changfu] Hunan Univ, Coll Civil Engn, Changsha 410082, Peoples R China.
通讯机构：
[Zhu, JF ] Z;Zhejiang Univ Sci & Technol, Coll Civil Engn & Architecture, Hangzhou 310023, Peoples R China.
关键词：
three-dimensional reliability evaluation;response surface;Morgenstern-Price method;probability distribution
摘要：
An analytical three‐dimensional slope reliability evaluation framework was developed in this work independent of use of numerical simulations. The slope stability analysis was necessarily carried out by utilizing an extended three‐dimensional Morgenstern–Price method, which was characterized by analytical formulations and competitive computational efficiency. Incorporation of the presented stability analysis method into response surface methodology led to an effective slope reliability evaluation framework. The applicability and superiority of this framework was examined and validated using a real complicated landslide case reported in practice, and a hypothetical slope example widely adopted in the literature. The impact of correlation coefficients and probability distribution patterns on the slope reliability assessment results was further addressed to derive additional benefits of this framework. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
语种：
英文
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“隧道及地下工程”课程教学改革探索与创新路径研究
作者：
张亮;张胜;邓宗伟;洪亮;付贵海
期刊：
科技风 ,2022年(29):113-115 ISSN：1671-7341
作者机构：
湖南城市学院土木工程学院
关键词：
隧道及地下工程;教学改革;教学理念;创新路径
摘要：
伴随着城市建设的快速发展及地下空间开挖的大量兴起，“隧道及地下工程”课程的重要性越来越得到凸显。本文在阐述了“隧道及地下工程”课程的特点及其重要性的背景下，分析了该课程在传统理论教学模式、实践性教学及学生考评等方面存在的不足与困境，提出从教学理念、虚拟仿真教学等方面对该课程教学实践路径进行探索和创新，旨在为轨道交通方向人才培养提供有益思路。
语种：
中文
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Effects of Stiffener Type on Fatigue Resistance of Steel-UHPC Composite Bridge Decks
作者：
Sun, Xiugui;Hu, Jianhua;Li, Yu;Huang, Guoping
期刊：
Advances in Civil Engineering ,2022年2022 ISSN：1687-8086
通讯作者：
Hu, JH;Huang, GP
作者机构：
[Sun, Xiugui] Hunan Univ, Changsha 410082, Peoples R China.;[Hu, JH; Hu, Jianhua] Hunan Commun & Water Conservancy Grp LTD, Changsha 410000, Peoples R China.;[Li, Yu] Survey & Design Inst Co Ltd, Hunan Prov Commun Planning, Changsha 410000, Peoples R China.;[Huang, Guoping] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Hu, JH ; Huang, GP ] H;Hunan Commun & Water Conservancy Grp LTD, Changsha 410000, Peoples R China.;Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.
摘要：
Recent research showed that ultrahigh-performance concrete (UHPC) and orthotropic steel bridge decks could be integrated to form steel-UHPC composite sections offering superior load-carrying capacity and fatigue resistance. This study investigates the effects of longitudinal stiffener types on the fatigue resistance of steel-UHPC composite sections. Three types of longitudinal stiffeners were compared, including U-ribs, bulb flat ribs, and plate ribs. Finite element analysis and full-scale fatigue tests were performed to investigate the load-carrying capacity and fatigue resistance of the composite bridge decks with different stiffeners. Besides, the proposed steel-UHPC composite bridge decks were compared with conventional orthotropic steel decks. The results show that steel box girders with bulb flat rib composite deck have reasonable fatigue resistance, construction efficiency, and economic benefits. This study is expected to promote the design and evaluation of economic steel-UHPC composite bridge decks to achieve higher mechanical performance and long-term durability. © 2022 Xiugui Sun et al.
语种：
英文
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Research on an optimisation control method of large-scale buildings energy saving based on particle swarm optimisation
作者：
Xiaolong Wen
期刊：
International Journal of Global Energy Issues ,2022年44(2-3):166-181 ISSN：0954-7118
通讯作者：
Wen, X.
作者机构：
[Xiaolong Wen] College of Civil Engineering, Hunan City University, Yiyang, Hunan, 413000, China
通讯机构：
College of Civil Engineering, Hunan City University, Hunan, Yiyang, China
关键词：
BIM technology;large-scale building;automation;energy saving control;multiple linear regression;particle swarm optimisation algorithm
摘要：
Aiming at the problems of high energy consumption and low day-lighting coefficient in traditional building energy-saving control methods, an energy-saving optimisation control method for large-scale buildings based on particle swarm optimisation is proposed. Using Autodesk Revit in BIM modelling software the software constructs the large-scale building model, extracts the characteristics of large-scale building organisation information by SIFT method; uses multiple linear regression analysis method to obtain the large-scale building model wall, external window heat transfer coefficient and other parameters, completes the large-scale building operation state analysis; uses particle swarm optimisation algorithm to optimise the large-scale building energy-saving parameters, and obtains its objective function to obtain the large-scale construction Building the optimal energy consumption parameters to achieve large-scale building automation energy-saving control. The experimental results show that: after the energy-saving control of large-scale buildings, the day-lighting coefficient is higher. Copyright © 2022 Inderscience Enterprises Ltd.
语种：
英文
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氯盐环境与荷载耦合作用下加载龄期对钢筋混凝土柱徐变影响
作者：
曹国辉;王礼彬;张展维
期刊：
建筑结构学报 ,2022年43(6):275-283 ISSN：1000-6869
作者机构：
[曹国辉] 湖南城市学院土木工程学院;[王礼彬] 长沙理工大学土木工程学院;[张展维] 湘潭大学土木工程与力学学院
关键词：
RC柱;早龄期混凝土;钢筋不均匀锈蚀;静力试验;徐变
摘要：
为探究氯盐环境与荷载耦合作用下钢筋混凝土柱的徐变效应，在持荷与氯盐腐蚀环境下，对早龄期与标准龄期钢筋混凝土柱进行了202d的长期试验，测试了早龄期混凝土柱在轴压、小偏压、大偏压三种受力状态下的徐变行为，并与相同条件下标准龄期混凝土柱的徐变行为进行了对比。结果表明：钢筋锈蚀率为10%时，锈蚀构件的徐变系数略低于未锈蚀构件；钢筋锈蚀率为20%时，锈蚀构件的早期徐变系数偏低，而后期徐变系数出现较快且持续的增长。与标准龄期构件相比，早龄期构件的徐变系数偏低于理论值，主要原因是：（1）荷载作用下试件压区混凝土胶凝体发生粘性流动挤压钢筋引起粘结力增强；（2）钢筋锈蚀引起粘结力变化。根据钢筋实际锈蚀状况，拟合出钢筋锈蚀率分布函数，并通过粘结退化系数得出对应的徐变折减系数，提出了修正的ACI209R徐变模型。该修正徐变模型的预测效果较好，可用于氯盐环境下钢筋混凝土柱的徐变预测。当构件锈蚀率为10%时，模型可靠性高；当构件锈蚀率为20%时，在持载早期，模型计算值较实测值偏高，但后期两者的差值越来越小。
语种：
中文
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Interface creep behavior of tensioned GFRP tendons embedded in cemented soils
作者：
Chen, C.;Zhu, S.;Zhang, G.;Morsy, A. M.;Zornberg, J. G.;...
期刊：
Geosynthetics International ,2022年29(3):241-253 ISSN：1072-6349
通讯作者：
Zhang, G
作者机构：
[Zhu, S.; Chen, C.; Huang, J.] Hunan Univ, Minist Educ, Key Lab Bldg Safety & Energy Efficiency, Changsha, Peoples R China.;[Zhu, S.; Chen, C.; Huang, J.] Hunan Univ, Coll Civil Engn, Changsha, Hunan, Peoples R China.;[Zhang, G.] Hunan City Univ, Coll Civil Engn, Yiyang, Hunan, Peoples R China.;[Morsy, A. M.] Loughborough Univ, Sch Architecture Bldg & Civil Engn, Loughborough, Leics, England.;[Morsy, A. M.] Cairo Univ, Dept Civil Engn, Giza 12613, Egypt.
通讯机构：
[Zhang, G ] H;Hunan City Univ, Coll Civil Engn, Yiyang, Hunan, Peoples R China.
关键词：
Geosynthetics;Glass fiber-reinforced polymer;Cemented soils;Interface creep behavior;Burgers model
摘要：
This paper presents an experimental investigation and modeling of interface creep behavior of glass fiber-reinforced polymer (GRFP) tendons embedded in cemented soils. Rapid and creep pullout tests were carried out on GRFP tendons embedded in cemented soils using a specially developed pullout setup. Interface creep displacement responses for specimens with two different water-cement ratios were derived under various interface shear stress conditions. A modified Burgers model was developed to characterize the interface creep behavior by incorporating a time-dependent viscosity coefficient. This viscosity coefficient was calibrated using creep rate variation obtained experimentally. Regression fittings on a part of interface creep measurements were conducted to determine the value of the parameters of the interface creep model. Additional interface creep measurements were used to validate the applicability of the presented creep testing protocol and the effectiveness of the rheological modeling was validated. © 2021 Thomas Telford Ltd.
语种：
英文
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膨胀剂对钢管混凝土圆柱轴压承载能力试验研究
作者：
陈咏明;曹国辉
期刊：
建筑结构 ,2022年52(S1):1355-1359 ISSN：1002-848X
作者机构：
湖南城市学院土木工程学院
关键词：
圆柱;轴心受压;承载能力;膨胀剂;养护龄期
摘要：
通过8根素混凝土、钢筋混凝土、钢管混凝土和钢管膨胀混凝土圆柱体在各级荷载等级下轴压力学性能试验，研究了不同养护龄期、膨胀剂对上述构件轴压极限承载能力的影响。结果表明：钢管混凝土圆柱在弹性变形阶段轴力主要由核心混凝土承压，钢管膨胀混凝土由钢管和核心混凝土共同承压，钢管膨胀混凝土圆柱持荷全过程表现出明显弹塑性阶段。钢管膨胀混凝土极限承载能力大于钢管混凝土和钢筋混凝土极限承载能力，掺合膨胀剂可有效改善钢管混凝土受力性能。养护龄期和膨胀剂成为素混凝土圆柱极限承载能力两个非常关键因素，且对素混凝土圆柱极限承载能力均起到加强作用，膨胀剂在钢管混凝土圆柱极限轴压力学性能中起主导作用，养护龄期对钢管混凝土圆柱轴压承载能力影响不大。
语种：
中文
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K-S函数集成局部性能约束的结构拓扑优化二阶逼近解法
作者：
彭细荣;隋允康;叶红玲;铁军
期刊：
固体力学学报 ,2022年43(3):307-317 ISSN：0254-7805
通讯作者：
Sui, Y.
作者机构：
[彭细荣] School of Civil Engineering, Hunan City University, Yiyang, 413000, China;[叶红玲; 隋允康] Numerical Simulation Center for Engineering, Beijing University of Technology, Beijing, 100022, China;[铁军] Tianjin University of Finance and Economics, Institute of Technology, Tianjin, 300222, China
通讯机构：
[Sui, Y.] N;Numerical Simulation Center for Engineering, China
关键词：
局部性能;结构拓扑优化;K-S函数;优化模型的二阶逼近;ICM方法
摘要：
应用K-S （Kreisselmeier–Steinhauser）函数，对结构拓扑优化问题中的局部性能如应力、疲劳寿命等进行集成然后求解。首先针对互逆规划的单目标多约束模型（称为s方模型）及多目标单约束模型（称为m方模型），应用结构拓扑优化ICM方法，分别建立了基于K-S函数集成处理的优化模型，推导了集成化的约束（对s方模型）或目标（对m方模型）函数的一阶及二阶导数，采用序列二次规划模型对所建立的优化模型进行迭代求解，依据K-T条件给出了二次规划模型的迭代求解公式。然后基于K-S函数阐述了s方模型的集成迭代解法，亦即集成方法。最后，阐述了基于K-S函数的s方模型和m方模型交替融合的迭代解法，亦即集成-集成方法。结果表明集成-集成方法比单纯的集成方法收敛更快。
语种：
中文
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Theoretical and experimental investigations of anchoring force loss behavior for prestressed ground anchors
作者：
Zhu, Shimin;Chen, Changfu;Zhang, Genbao;Du, Cheng
期刊：
Canadian Geotechnical Journal ,2022年59(9):1587-1601 ISSN：0008-3674
通讯作者：
Chen, Changfu(cfchen@hnu.edu.cn)
作者机构：
[Du, Cheng; Zhu, Shimin; Chen, Changfu] Hunan Univ, Key Lab Bldg Safety & Energy Efficiency, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Du, Cheng; Zhu, Shimin; Chen, Changfu] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.;[Zhang, Genbao] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Hunan, Peoples R China.
通讯机构：
[Chen, C.] K;Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education, Hunan, China
关键词：
anchoring force loss;load transfer;prestressed ground anchor;relaxation
摘要：
Anchoring force loss is critically concerned for the in-service performance of prestressed ground anchors. This time-dependent loss of pretension exerted at the anchor head is caused primarily by stress relaxation, which integrally manifests the rheological properties of the anchor and the geomaterial in which the anchor is embedded. A load-transfer modeling framework was established to derive the time-dependent anchoring force response. The modeling parameters were directly calibrated via element-scale pullout stress relaxation test using a specially developed setup. The applicability and effectiveness of this analytical modeling framework were verified via large-scale laboratory model tests and in situ tests of prestressed an-chors. The predictions derived using the presented modeling framework were in good agreement with measurements in both laboratory model tests and in situ tests, particularly for evolutions of anchoring force over time. Sensitivity evaluation of the model parameters was performed to study their respective impact on the anchoring force loss response. This work can provide insights into the understanding of the anchoring force loss behavior of prestressed ground anchors and facilitate their design practice for in-service performance. © 2022 The Author(s).
语种：
英文
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长株潭城市群绿色城镇化的水平测度及路径研究
作者：
余方
期刊：
山西农经 ,2022年(12):21-23 ISSN：1004-7026
作者机构：
湖南城市学院土木工程学院
关键词：
长株潭城市群;绿色城镇化;协同发展
摘要：
随着我国社会主义经济蓬勃发展,不同地区经济发展的协同作用已成为进一步提高我国经济发展速度和质量的关键因素。对长株潭城市群绿色城镇化的水平测度及路径进行深入研究,分析了国内外城市群体绿色城镇化经验,提出了长株潭城市群绿色城镇化发展路径。
语种：
中文
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