作者机构：
[舒兴平] College of Civil Engineering, Hunan Univ., Changsha 410082, China;[王元清] Dept. of Civil Engineering, Tsinghua Univ., Beijing 100084, China;[张再华] College of Civil Engineering, Hunan City Univ., Yiyang 413000, China
通讯机构：
College of Civil Engineering, Hunan Univ., China
作者机构：
[郦世平; 郭健] Design Institute, Hunan Univ., Changsha 410082, China;[田雁新] Department of Civil Engineering, Hunan City Univ., Yiyang 413000, China;[周海兵] General Company, Hunan Provincial Construction Engineering Group, Changsha 410004, China;[何益斌] College of Civil Engineering, Hunan Univ., Changsha 410082, China
作者机构：
[Chen, Bo-Wang; Shen, Pu-Sheng; Wang, Hai-Bo] College of Civil Engineering, Hunan Univ, Changsha 410082, China;[Chen, Bo-Wang] College of Civil Engineering, Hunan City Univ, Yiyang 413000, China
通讯机构：
College of Civil Engineering, Hunan Univ, China
关键词：
Dynamic characteristic;Pseudo dynamic test;Reinforced concrete tube in tube model;Seismic behavior;Static elastic test;Test research
摘要：
The static elastic test of a 14-story 1/10 scale reinforced concrete tube in tube structure model was carried out. The influence of eccentric lateral load and top vertical load on the properties of the structure model was studied under static loads. In pseudo dynamic test, the model was equivalent as two degrees of freedom, and was executed a pseudo dynamic testing with six cases of acceleration earthquake wave. The dynamic characteristic, earthquake response in elastic and elastic-plastic stage, seismic behavior and failure mechanism of the model were studied. The test indicated that the model was in elastic under seismic seldom intensity of 7 degree and that the outer tube cracked seriously but the structure behaved perfect bearing capacity and lateral stiffness under seismic seldom intensity of 9 degree, in which the maximum story drift rotation reached merely 1/148. Hysteretic curve of the structure showed superior performance of ductility and energy dissipation. Finally, a FEM program on the basis of the advantaged non-line-bar element model was developed, and the calculation results of the displacement time-history curve agreed well with those of the tests.
作者机构：
[杨慧; 江学良; 曹平] 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 Resources and Safety Engineering, Central South University, China
作者机构：
[曹国辉; 方志] School of Civil Engineering, Hunan University, Changsha 410082, China;School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Civil Engineering, Hunan University, China
作者机构：
[沈蒲生] College of Civil Engineering, Hunan University, Changsha 410082, China;[陈伯望] Hunan City University, Yiyang 413000, China;[王海波] College of Civil Engineering, Hunan University, Changsha 410082, China<&wdkj&>Hunan City University, Yiyang 413000, China
通讯机构：
[Wang, H.-B.] C;College of Civil Engineering, Hunan University, China
作者机构：
[刘新喜; 夏元友] School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;[宁齐元] Hunan Vocational Institute of Technology, Xiangtan 411100, China;[陈向阳] Institute of Civil Engineering, Hunan City University, Yiyang 413000, China;[刘祖德] School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China
通讯机构：
School of Civil Engineering and Architecture, Wuhan University of Technology, China
作者机构：
[刘新喜; 夏元友] School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;[陈向阳] College of Civil Engineering, Hunan City University, Yiyang 413000, China;[蔡俊杰] Xiangtan Zhaoshan Economy Construction Investment Company, Xiangtan 411100, China;[刘祖德] School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China
通讯机构：
School of Civil Engineering and Architecture, Wuhan University of Technology, China
会议名称：
Nonintrusive Inspection, Structures Monitoring, and Smart Systems for Homeland Security
会议时间：
San Diego, CA, United States
会议论文集名称：
Nonintrusive Inspection, Structures Monitoring, and Smart Systems for Homeland Security
关键词：
acceleration;substructure;identification;neural networks;root mean square of prediction difference vector (RMSPDV);stiffness;damping coefficients
摘要：
A substructural identification methodology by the direct use of acceleration measurements with neural networks is proposed. The rationality of the substructural identification methodology employing a substructural acceleration-based emulator neural network (SAENN) and a substructural parametric evaluation neural network (SPENN) is explained. Based on the discrete time solution of the state space equation of the substructure, the theory basis for the construction of SAENN and SPENN is described. An evaluation index called root mean square of prediction difference vector (RMSPDV) corresponding to acceleration response is presented to evaluate the condition of object structure. The performance of the SAENN for acceleration forecasting and SPENN for parametric identification is examined by numerical simulations with a substructure of a 50-DOFs shear structure involving all stiffness and damping coefficient values unknown. Based on the trained SAENN and the PENN, the inter-storey stiffness and damping coefficients of the substructure are identified. Since the strategy does not require structural modes or frequencies extraction, it is computationally efficient, thus providing a possibly viable tool for structural identification and damage detection of large-scale infrastructures.
作者机构：
[陈伯望; 王海波; 沈蒲生] School of Civil Engineering, Hunan University, Changsha 410082, China;[王海波] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Civil Engineering, Hunan University, China
作者机构：
[Jiang, Xue-Liang; Cao, Ping] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[Jiang, Xue-Liang] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Resources and Safety Engineering, Central South University, China
关键词：
Elastoplastic finite elements;Rock slope;Simulation of stage excavation;Stability analysis;Strength reduction FEM
摘要：
The simulation of stage excavation of the high slope of Chang-Zhang Expressway is carried out by using two-dimensional elastoplastic finite element method, considering the influence of blasting and rock joint. The rock mass's deformation, stresses and yielding state in the excavation process are analyzed respectively. The integral safety of the high slope is discussed by using the method of lowing material's strength safety factor and in light of the yielding rate of the slope's rock mass element and variation of displacements of the key parts. Through researching the important slope K123, a conclusion that the slopes are stable in construction process, is drawn.
关键词：
Recycled aggregates;Recycled aggregates concrete;Ultrafine mineral powder
摘要：
Modified recycled aggregates were prepared with three different cement-admixture grouts. The physical properties, such as water absorption, apparent density, crushing index, slump and compressive strength of the recycled aggregate and the recycled concretes were tested, and the tests for the compression-deformation behavior of the concretes were also performed. The experimental results show that the cement-Kim powder grout is satisfied for enhancing the recycled concrete, and the modification of the recycled aggregate with the grouts can improve the toughness and the deformation ability of the concretes.
作者机构：
[王海波; 陈伯望; 沈蒲生] College of Civil Engineering, Hunan University, Changsha 410082, China;[陈伯望; 王海波] College of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
[Chen, B.-W.] C;College of Civil Engineering, Hunan University, China
作者机构：
[陈健美] Dept. of Civil Eng., Hu'nan City Coll., Yiyang 413000, China;[周卓夫] Dept. of Math., Coll. of Career Commun. Technol., Changsha 410015, China;[张新明; 陈健美; 唐建国] Sch. of Mat. Sci. and Eng., Central South Univ., Changsha 410083, China
通讯机构：
[Chen, J.-M.] D;Dept. of Civil Eng., Hu'nan City Coll., China
