远场地震动作用下泛旗帜型模型的等延性弹塑性位移谱  

Constant-ductility elastoplastic displacement spectra of generalized flag-shaped hysteresis model subjected to far-field ground motions

作　　者：吴宜峰 张国栋 李爱群 张琰[1] Wu Yifeng;Zhang Guodong;Li Aiqun;Zhang Yan(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学未来城市设计高精尖创新中心,北京100044

出　　处：《东南大学学报（自然科学版）》2021年第5期770-775,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51908024,51978003);北京市自然科学基金资助项目(8194057);北京市优秀人才培养项目资助青年骨干人才资助项目(2018000020124G051);北京建筑大学金字塔人才工程培养计划建大英才资助项目(JDYC20200310).

摘　　要：为获得自复位结构泛旗帜型模型的等延性弹塑性位移谱,将269条隶属于3类不同场地的远场地震动分别输入自编的位移谱计算程序中,分析计算结果以获得与标准化周期、延性系数、场地类别、耗能系数相关的单自由度泛旗帜型模型的等延性弹塑性位移谱.研究结果表明,通过周期标准化,位移谱曲线更加平滑,离散性显著减小.当标准化周期在[0.10,0.75]内时,位移谱谱值与延性系数呈正相关关系,当标准化周期在[0.75,3.0]内时,两者呈负相关关系.延性系数大于4时,其对位移谱的影响可忽略.标准化位移谱中,Ⅱ、Ⅲ类场地地震动的位移谱值差异较小,而Ⅰ、Ⅱ类场地地震动的位移谱值在周期较小时差异较大.位移谱谱值随耗能系数的增大而减小,综合考虑耗能能力与效率,耗能系数建议取值为0.5.To obtain the constant-ductility elastoplastic displacement spectra of generalized flag-shaped hysteresis for self-centering structures,269 far-field ground motions belonging to three different types of sites were input into the self-compiled displacement spectra program.The calculation results were analyzed to obtain the displacement spectra of the generalized flag-shaped model for single-degree-of-freedom related to the normalized period,ductility coefficient,site category and energy dissipation coefficient.The results show that after period normalization,the displacement spectra curve is smoother than the original curve,and the dispersion significantly decreases.When the normalized period is in the range from 0.10 to 0.75,the displacement spectra value has a positive correlation with the ductility coefficient,and the correlation between them is opposite when the normalized period is in the range from 0.75 to 3.0.When the ductility coefficient is greater than 4,its influence on the displacement spectra is negligible.In the normalized displacement spectra,the spectra values of the ground motions forⅡandⅢtypes of sites have few differences,while those forⅠandⅡtypes of sites are quite different when the period is small.In addition,the displacement spectra value decreases with the increase of the energy dissipation coefficient.Considering the energy dissipation capacity and efficiency,the energy dissipation coefficient is recommended to be 0.5.

关 键 词：泛旗帜型滞回模型 周期标准化 延性系数 场地类别 耗能系数 等延性位移谱 

分 类 号：TU352.11[建筑科学—结构工程]