摘要
耗能器和预拉力钢绞线的协同工作性能,是可控摇摆自复位结构的抗震设计主要考虑因素。通过理论分析该结构工作性能提出基于位移的性能化设计方法。在利用已有试验结果验证有限元方法的可行性后,采用Open Sees有限元软件对一个三层自复位结构进行了3组27个试件的时程分析,研究参数自复位率对结构抗震性能的影响。模拟分析结果表明:自复位率的增大能有效减小残余变形,但对峰值变形起放大作用,而这种放大作用与钢板耗能器的强度有关,因此需要将自复位率作为控制指标;将自复位率控制在0.625附近,能有效限制结构的震后残余位移,并使结构的层间侧移角峰值不致过大。
Coordination of the energy consumer and pre-tensioning stranded fuse plays an important role in the seismic design of the controlled-rocking self-centering steel frame. Based on the theoretical analysis of the seis-mic performance of the structure, a displacement-based design is introduced. The open-source software Open Sees is used to conduct the nonlinear time-history analysis of 27 specimens of 3 groups in a 3-layer selfcentering structure after the validation of the result of the experiment, which is used to study the impact of the parameter self-centering ratio on the seismic performance. The results indicate that the increase in the self-cen-tering ratio can significantly reduce the residual uplift ratio, but has an amplification effect on the peak displace-ment under the designed earthquake. The amplification has some relation to the rigidity of the energy consumer,so the self-centering ratio should be taken as a control index. What＇s more, the control of the self-centering ratio around 0.625 will effectively limit the residual deformation below the limit value from the standard after the earthquake, and ensure that the peak value of uplift ratio is not too large.
出处
《苏州科技学院学报（工程技术版）》
CAS
2015年第4期30-36,共7页
Journal of Suzhou University of Science and Technology （Engineering and Technology）
基金
国家自然科学基金项目(51378326)
江苏省结构工程重点实验室开放课题(ZD1204)
关键词
可控摇摆自复位钢框架
性能化设计
柱脚抬升
自复位率
self-centering steel frame with controlled rocking
uplift ratio of the column base
self-centering ratios
