Shaking table test on seismic response of frame structures across the ground fissure
Chen Xuan1,2,3 Xiong Zhongming1,2,3 Zhang Chao1,2,3 Huo Xiaopeng1,2,3 Cheng Pan1,2,3
1. School of Civil Engineering, Xian University of Architecture and Technology, Xian 710055, China;2. Key Lab of Structural
Engineering and Earthquake Resistance of Ministry of Education, Xian University of Architecture and Technology, Xian 710055, China;
3. Shaanxi Key Lab of Geotechnical and Underground Space Engineering, Xian University of Architecture and Technology, Xian 710055, China
Abstract：To study the dynamic response of structure in ground fissure environment, shaking table tests were firstly conducted for the comparison of structure across the ground fissure and structure on the unfissured ground. Some analyses were performed on the structure across the ground fissure under earthquake for its failure pattern, dynamic properties, acceleration responses, displacement responses and strain responses. The results are as follows: intensity, peak time, frequency and phase of the seismic waves reaching the ground surfaces of hanging wall and footwall were different, forming the non-uniform seismic excitations. Moreover, the site with ground fissure had an amplification effect on acceleration of soil layer, and the maximum acceleration of the same soil layer occurred at the hanging wall near the ground fissure. For the structure across the ground fissure, structural components on the hanging wall suffered more damage than those on the footwall. Under the same seismic wave input, the seismic response of the structure across the ground fissure was more significant than that in the site without ground fissures. In addition, the maximum lateral displacement of the structure across the ground fissure may not appear at the top floor, which is due to the combination of the uneven settlement caused by the ground fissure and the additional deformation of the foundation. The strain amplitude distribution of the column reinforcement in the structure across the ground fissure showed the hanging wall/footwall effect, that is, the strain amplitude of the column reinforcement on the hanging wall shall be significantly greater than that on the footwall. The research results can provide reference for structural design under the ground fissure environment.
陈轩 熊仲明 张朝 霍晓鹏 程攀 . 跨地裂缝框架结构地震响应振动台试验研究[J]. 土木工程学报, 2021, 54(4): 26-35.
Chen Xuan Xiong Zhongming Zhang Chao Huo Xiaopeng Cheng Pan. Shaking table test on seismic response of frame structures across the ground fissure. 土木工程学报, 2021, 54(4): 26-35.
