作者机构：
[熊创贤; 邓运来; 曹盛强; 张新明] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[熊创贤] Department of Civil Engineering, Hunan City University, Yiyang 413000, Hunan, China
通讯机构：
[Cao, S.-Q.] S;School of Materials Science and Engineering, Central South University, China
作者机构：
[肖艳苹; 李文斌; 刘晓艳; 何运斌; 潘清林] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[李文斌] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Materials Science and Engineering, Central South University, China
作者机构：
[刘自由; 江学良] School of Civil Engineering, Hunan University of City, Yiyang 413000, China;[林杭] School of Resources and Safety Engineering, Central South University, Changsha 410083, China
通讯机构：
School of Civil Engineering, Hunan University of City, China
作者：
Li Wen-bin;Pan Qing-lin*;Xiao Yan-ping;He Yun-bin;Liu Xiao-yan
期刊：
中南大学学报(英文版),2011年18(2):279-284 ISSN：2095-2899
通讯作者：
Pan Qing-lin
作者机构：
[Pan Qing-lin; Li Wen-bin; Xiao Yan-ping; Liu Xiao-yan; He Yun-bin] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.;[Li Wen-bin] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Pan Qing-lin] C;Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
关键词：
Al-Zn-Cu-Mg-Sc-Zr alloy;retrogression and re-aging treatment;microstructure;mechanical properties;stress corrosion cracking
摘要：
The mechanical properties and stress corrosion cracking (SCC) resistance of an Al-Zn-Cu-Mg-Sc-Zr alloy under different aging conditions were investigated. The dependence of microstructure and mechanical properties on aging parameters was evaluated by tensile test, hardness test and conductivity measurement. The results show that for the alloys with retrogression and re-aging treatment (RRA), the conductivity increases with the retrogression time and temperature, while the tensile strength decreases. The transmission electron microscopy (TEM) results show that the precipitates η(MgZn2) at grain boundary aggregate apparently with retrogression time and the precipitates inside the matrix exhibit the similar distribution to T6 temper, which comprises fine GP zones, large η′(MgZn2) and η(MgZn2) phases. According to the mechanical properties and microstructure observations, the optimal RRA regime is recommended to be 120 °C, 24 h + 180 °C, 30 min + 120 °C, 24 h. The strength level of the alloy after the optimum RRA treatment is similar to that in T6 condition and the SCC resistance is improved obviously in contrast to T6 condition.
作者机构：
[张可能; 黎永索] School of Geoscience and Info-Physics, Central South University, Changsha 410083, China;[李钟; 黄常波; 邓美龙] China Construction Municipal Construction Corporation Limited, Beijing 100163, China;[黎永索] School of Civil Engineering, Hunan City University, Yiyang, Hunan 413000, China
通讯机构：
School of Geoscience and Info-Physics, Central South University, China
摘要：
Tunnel excavation is often done in underground engineering such as civil tunnel construction and mine excavation. The numerical simulation can output colorful results to interpret the tunnel excavation effect more easier. Among all the numerical simulation methods, fast lagrangian explicit finite difference code of continua (FLAC3D) is widely used to solve practical problems, especially in field of elasto-plastic characteristic and construction procedure. So in the present paper, 3 steps of excavations in a tunnel is modeled by FLAC3D to present the stress and displacement distribution, and give guidance for the real practice.
作者：
Jin, Z. R.;Zhang, D. M.;Wang, Y. H.*;Li, Z. L.
期刊：
Engineering Analysis with Boundary Elements,2011年35(11):1204-1213 ISSN：0955-7997
通讯作者：
Wang, Y. H.
作者机构：
[Jin, Z. R.] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China.;[Zhang, D. M.; Wang, Y. H.; Li, Z. L.] Huazhong Univ Sci & Technol, Sch Civil Engn & Mech, Wuhan 430074, Hubei, Peoples R China.
通讯机构：
[Wang, Y. H.] H;Huazhong Univ Sci & Technol, Sch Civil Engn & Mech, Wuhan 430074, Hubei, Peoples R China.
关键词：
Boundary element method;Dynamic element discretization method;Isoparametric elements;Traction boundary integral equation
作者机构：
[Pan, Qing-Lin; Li, Wen-Bin; He, Yun-Bin; Xiao, Yan-Ping; Liu, Xiao-Yan] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.;[Pan, Qing-Lin] Minist Educ, Key Lab Nonferrous Mat Sci & Engn, Changsha 410083, Peoples R China.;[Li, Wen-Bin] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Xiao, Yan-Ping] C;Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
关键词：
A. Non-ferrous metals and alloys;E. Corrosion;F. Microstructure
摘要：
Influence of retrogression and re-aging treatment on the microstructure, strength, exfoliation corrosion, inter-granular corrosion and stress corrosion cracking of an Al-Zn-Mg-Cu alloy has been investigated by means of optical microscope (OM), transmission electron microscope (TEM) and electrochemical impedance spectroscopy (EIS). The results show that retrogression and re-aging treatment can increase the size and the distribution discontinuity of the grain boundary precipitates, and lead to the increase of the corrosion resistance without the loss of strength and ductility. In addition, the analysis of electrochemical impedance spectroscopy shows that retrogression and re-aging treatment can enhance the resistance to exfoliation corrosion. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
作者机构：
[钟新谷; 沈明燕; 杨滔] Civil Engineering Construction Quality and Safety Control Laboratory, Hunan University of Science and Technology, Xiangtan 411201, China;[杨滔] Civil Engineering Testing Center, Hunan City University, Yiyang 413000, China
通讯机构：
Civil Engineering Construction Quality and Safety Control Laboratory, Hunan University of Science and Technology, China
作者机构：
[杨慧; 江学良] School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China;[曹平] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[杨慧; 江学良] School of Civil Engineering, Hunan City University, Yiyang, Hunan 413000, China
通讯机构：
School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, China
摘要：
By means of axial compressive and eccentric compressive tests of four Four-tube Concrete-filled Steel Tubular Laced Columns, to research the mechanical properties and failure modes of this structural without yield point. Research shows that, the failure modes of this model, as well as axial compressive short columns, have the same trend of oblique shear failure, and presenting overall bending failure under eccentric compression. The linear eccentricity takes a biggish influence on mechanical properties of laced columns.
期刊：
Applied Mechanics and Materials,2011年94-96:1176-1179 ISSN：1660-9336
通讯作者：
Chen, Bowang
作者机构：
[Chen, Bowang] Hunan City Univ, Civil Engn Coll, Yiyang, Peoples R China.;[Yang Oyang; Tan, Jianguo] Hunan Sci & Technol Univ, Coll Civil Engn, Xiangtan, Peoples R China.
通讯机构：
[Chen, Bowang] H;Hunan City Univ, Civil Engn Coll, Yiyang, Peoples R China.
会议名称：
International Conference on Civil Engineering and Transportation (ICCET 2011)
会议时间：
OCT 14-16, 2011
会议地点：
Jinan, PEOPLES R CHINA
会议主办单位：
[Chen, Bowang] Hunan City Univ, Civil Engn Coll, Yiyang, Peoples R China.^[Yang Oyang;Tan, Jianguo] Hunan Sci & Technol Univ, Coll Civil Engn, Xiangtan, Peoples R China.
会议论文集名称：
Applied Mechanics and Materials
关键词：
Anti-seismic property;Concrete filled steel tube;Pseudo-dynamic test
摘要：
A pseudo-dynamic test has been finished to a CFST tube structure model. The model with 13 floors and a scale of 1:10 consists of an outer-tube and an inner-tube, the former is a framed-tube supported on CFST frames and the latter is an RC tube. A series of pseudo-dynamic tests on acceleration earthquake waves in four cases (peak acceleration equal to 0.22g, 0.4g, 0.62g and 1.0g) have been fulfilled by taking to the model. Some behavior of model is researched under earthquake, such as displacement time-history cure, force time-history cure and so on. The experiment has illustrated that the CFST tube structure is an outstanding structural style with excellent anti-seismic behavior.
摘要：
To simulate shear wall of tall building structures, some kinds of calculation methods towards Multi-Vertical-Line-Element Model are discussed in detail. A more reasonable element stiffness matrix and a improved Multi-Vertical-Line-Element Model are given. Combined with hysteretic axial model and hysteretic shear model, nonlinear analysis of a shear wall is put through. The calculation result indicates that the improved model has relatively well accuracy compared with test result.
作者机构：
[Chen, Qiang] Cent S Univ Forestry & Technol, Coll Civil Construct & Mech, Changsha 410004, Hunan, Peoples R China.;[Chen, Qiang; Liu, Lingyong] Hunan City Univ, Coll Civil Engn, Yiyang, Peoples R China.
通讯机构：
[Chen, Qiang] C;Cent S Univ Forestry & Technol, Coll Civil Construct & Mech, Changsha 410004, Hunan, Peoples R China.
会议名称：
International Conference on Civil Engineering and Building Materials (CEBM)
会议时间：
JUL 29-31, 2011
会议地点：
Kunming, PEOPLES R CHINA
会议主办单位：
[Chen, Qiang] Cent S Univ Forestry & Technol, Coll Civil Construct & Mech, Changsha 410004, Hunan, Peoples R China.^[Chen, Qiang;Liu, Lingyong] Hunan City Univ, Coll Civil Engn, Yiyang, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Model Experiment;Hanger;Carbon Fiber Reinforced Polymer/Plastic (CFRP);Steel Box Arch Bridge
摘要：
This paper was combined with a real bridge to construct a carbon fiber arch bridge scale test model according to similar principles, thereby testing and researching on its mechanical properties. Space finite element analysis software Midas / Civil was adopted for space simulation study of all working conditions in each use stage of the model bridge. The test results showed that: CFRP hanger tension and load in all working conditions of the model experience were basically changed in a linear mode, its working conditions were normal, all working conditions were basically matched with the theoretical calculation values except the hanger whose specific anchors were provided with slight slip, which indicates that it is feasible to allocate CFRP hanger in bowstring arch bridge while indicating that calculation and analysis results of finite element program can be used to guide loading work, measuring point selection and other work of the model bridge, and the experimental data and analysis results are correct.
作者机构：
[杨慧] School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China;[曹平; 杨慧] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[江学良] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, China
作者机构：
[蒋建清; 李丽民] School of Civil Engineering, Hunan City University, Yiyang 413000, China;[杨果林; 蒋建清] School of Civil Engineering and Architecture, Central South University, Changsha 410075, China
通讯机构：
School of Civil Engineering, Hunan City University, China
期刊：
Geotechnical Special Publication,2011年(221 GSP):170-177 ISSN：0895-0563
通讯作者：
Mao, G.(gxm.mao@126.com)
作者机构：
[Xia, Yuanyou; Liu, Lingwei] Institute of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;Institute of Civil Engineering, Hunan City University, Yiyang 413000, China;[Mao, Guangxiang] Institute of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China<&wdkj&>Institute of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Mao, G.] I;Institute of Civil Engineering and Architecture, Wuhan University of Technology, China
会议名称：
2011 GeoHunan International Conference - Tunnel Management, Emerging Technologies, and Innovation
会议时间：
June 9, 2011 - June 11, 2011
会议地点：
Hunan, China
会议论文集名称：
Tunnel Management, Emerging Technologies, and Innovation
作者机构：
[肖艳苹; 李文斌; 刘晓艳; 何运斌; 潘清林] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[李文斌] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Li, W.-B.] S;School of Materials Science and Engineering, Central South University, China
作者机构：
[Pan Qing-lin; Li Wen-bin; Xiao Yan-ping; Liu Xiao-yan; He Yun-bin] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China.;[Li Wen-bin] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Pan Qing-lin] C;Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China.
摘要：
The microstructural evolution and composition distribution of an Al-Zn-Cu-Mg-Sc-Zr alloy during homogenization were investigated by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The results show that severe dendritic segregation exists in Al-Zn-Cu-Mg-Sc-Zr alloy ingot. There are a lot of eutectic phases at grain boundary and the distribution of the main elements varies periodically along interdendritic region. The main eutectic phases at grain boundary are Al7Cu2Fe phase and T (Al2Mg3Zn3). The residual phases are dissolved into the matrix gradually during homogenization with increasing temperature and prolonging holding time, which can be described by a constitutive equation in exponential function. The overburnt temperature of the alloy is 473.9 °C. The optimum parameters of homogenization are 470 °C and 24 h, which is consistent with the result of homogenization kinetic analysis.
