作者机构：
[刘自由] 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;[江学良] School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410083, China
通讯机构：
School of Civil Engineering, Hunan University of City, China
作者机构：
[邓宗伟] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[邹金锋; 冷伍明] School of Civil Engineering and Architecture, Central South University, Changsha 410075, China;[邓宗伟; 唐葭] School of Civil and Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Resources and Safety Engineering, Central South University, China
摘要：
In order to present basic guidance for system calibration of split Hopkinson pressure bar (SHPB) with the special shape striker, wave characteristics and dynamic responses of SHPB under striker impact were analyzed. Stress generated by the special shape striker tends to have a half-sine waveform and has little wave dispersion during its propagation. Impact velocities of the special shape striker and peak values of generated stress still have linear relation but with a different coefficient from that of cylindrical strikers. From stress histories on the surfaces of the input bar impacted by the special shape striker off-axially and obliquely, it is found that the misalignment impacts usually trigger wave distortion and amplitude decrease, which can be used to identify the poor system adjustment. Finally, the system calibration of SHPB with the special shape striker can be classified into four steps: system adjustment, wave distortion identification, measurement calibration and transmission calibration, where the measurement calibration factor and transmission calibration factor are elaborated and redefined.
作者机构：
[胡天云; 邓运来; 张新明; 唐昌平] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[胡天云] Departments of Civil Engineering, Hunan City University, Yiyang 413000, Hunan, China;[邓运来; 张新明; 唐昌平] The Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Changsha 410083, China
通讯机构：
[Hu, T.-Y.] S;School of Materials Science and Engineering, Central South University, China
作者机构：
[Zeng, Ge] College of Traffic and Transportation, Changsha University of Science and Technology, Changsha 410076, China;[Zeng, Ge; 周志刚] College of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
College of Traffic and Transportation, Changsha University of Science and Technology, China
作者机构：
[熊创贤; 邓运来; 万里] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[邓运来; 万里] Key Laboratory of Nonferrous Metal Materials Science and Engineering, Central South University, Changsha 410083, China;[熊创贤] Department of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Materials Science and Engineering, Central South University, China
期刊：
Proceedings of the 12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Earth and Space 2010,2010年:2821-2828
通讯作者：
Du, T.(tingdu@126.com)
作者机构：
[Du, T.] School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, 430074, Wuhan, China;[Liu, J.] Department of Civil and Environmental Engineering, Wuhan Engineering Institute, 430080, Wuhan, China;[Liu, Z.X.; Lin, H.L.] Commercial Concrete Company of No. 3 Construction Bureau of China, 430070, Wuhan, China;[Wang, W.H.; Du, T.] School of Civil Engineering, Hunan City College, 413000, Yiyang, China
摘要：
The mechanical performance of recycled aggregate concrete (RAC) is investigated. An experiment on the complete stress-strain curve under uniaxial compression loading of RAC is carried out. The experimental results indicate that the peak stress, peak strain, secant modulus of the peak point and original point increase with the strength grade of RAC enhanced. On the contrary, the residual stress of RAC decreases with the strength grade enhancing, and the failure of RAC is often broken at the interface between the recycled aggregate and the mortar matrix. Finally, the constitutive model of stress-strain model of RAC has been constituted, and the results from the constitutive model of stress-strain meet the experiment results very well.
作者机构：
[熊创贤; 邓运来; 张新明; 张劲] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[邓运来; 张新明] Key Laboratory of Nonferrous Materials Science and Engineering, Ministry of Education, Changsha 410012, China;[熊创贤] Department of Civil Engineering, Hunan City Institute, Yiyang 413000, China
通讯机构：
[Xiong, C.-X.] S;School of Materials Science and Engineering, Central South University, China
作者机构：
[刘晓艳; 刘俊生; 李文斌; 何运斌; 梁文杰; 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：
[杨果林; 李昀; 蒋建清; 许桂林; 王亮亮] School of Civil Engineering and Architecture, Central South University, Changsha 410075, China;[蒋建清] School of Civil Engineering, Hunan City University, Yiyang 413000, China
通讯机构：
School of Civil Engineering and Architecture, Central South University, China
作者机构：
[刘晓艳; 刘俊生; 李文斌; 何运斌; 梁文杰; 潘清林] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[李文斌] Department of Civil Engineering, Hunan City University, Yiyang 413000, Hunan, China
通讯机构：
[Pan, Q.-L.] S;School of Materials Science and Engineering, Central South University, China
作者机构：
[杨慧; 陈瑜; 曹平; 马春德] 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：
[李志勇] School of Civil and Architectural Engineering, Central South University, Changsha 410075, China;[邓宗伟] School of Civil Engineering, Hunan City University, Yiyang 413000, China;[李志勇] Hunan Institute of Communications and Transport, Changsha 410007, China
通讯机构：
School of Civil and Architectural Engineering, Central South University, China
作者机构：
[刘自由; 江学良] School of Civil Engineering, Hunan University of City, Yiyang, Hunan 413000, China;[左文贵] School of Geoscience and Environment Engineering, Central South University, Changsha 410083, China
通讯机构：
School of Civil Engineering, Hunan University of City, 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; 杨慧] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[江学良] School of Civil Engineeing, 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：
[Jiang Jian-qing; Yang Guo-lin] Cent S Univ, Sch Civil & Architectural Engn, Changsha 410075, Hunan, Peoples R China.;[Jiang Jian-qing] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Jiang Jian-qing] C;Cent S Univ, Sch Civil & Architectural Engn, Changsha 410075, Hunan, Peoples R China.
关键词：
red-sandstone;large-scale field test;mechanical characteristic;strength parameter
摘要：
Large-scale field shear tests on ten specimens of the red-sandstone embankment at a highway in Hunan, China, were performed to examine mechanical characteristics and parameters of red-sandstone. The curves of thrust-displacement, failure mode, and shear strength parameters for red-sandstone with different water contents, different compactions, and different grain size distributions were obtained from the tests. A practical procedure of in-situ test for red-sandstone embankment was proposed to normalize the test equipment and test steps. Based on three-dimensional thrust-sliding limit equilibrium method, the formulas for calculating strength parameters of red-sandstone considering three-dimensional sliding surface were inferred. The results show that red-sandstone has typical complete curves of stress-strain, strain softening, which are caused by the special structure of red-sandstone; water content and compaction are important factors for strength and failure mode of red-sandstone; The average value of cohesion and internal friction angle of the specimens calculated by three-dimensional technique are 21.56 kPa and 29.29°, respectively, and those by traditional two-dimensional method are 25.52 kPa and 33.76°, respectively.
作者机构：
[熊创贤; 邓运来; 万里; 张新明] School of Materials Science and Engineering, Central South University, Changsha 410083, China;[邓运来; 万里; 张新明] Key Laboratory of Nonferrous Materials Science and Engineering, Changsha 410012, China;[熊创贤] Department 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：
[江学良; 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, Hunan Yiyang 413000, China
通讯机构：
School of Resources and Safety Engineering, Central South University, China
作者机构：
[刘霁] School of Civil Engineering and Mechanics, Central South University of Forestry and Technology, Changsha 410004, China;[周智勇; 陈建宏] School of Resource and Safety Engineering, Central South University, Changsha 410083, China;[李云; 刘霁] College 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
