深圳大学学报（理工版）2017，Vol.34Issue(5)：488-494,7.DOI:10.3724/SP.J.1249.2017.05488
远场地震作用下长周期结构的基底剪重比
Seismic base shear coefficients of long-period structures subjected to far-field ground motions
摘要
Abstract
The paper aims to investigate the effect of far-field ground motions with two amplitude modulation means,i.e.peak ground acceleration (PGA) and peak ground velocity (PGV),on seismic base shear coefficients of long-period structures.Three far-field earthquake records and one typical near-field accelerogram are chosen as input ground motions.Six steel reinforced concrete frame-core wall structures are designed and studied through dynamic time history analyses with a set of four selected ground motions scaled to the fortification earthquake level.Numerical results show that,by scaling PGA,the seismic base shear coefficients under far-field ground motions are significantly larger than those of the near-field ground motion.However,in the way of scaling PGV,the difference between two types of earthquake records is minor.The structural top displacements are more effected by the far-field ground motions in comparison with those of the near-field ground motion under the two scaling methods.It is also found that the two structural responses,the top displacement and the seismic base shear coefficient in the way of scaling PGV are larger than those of scaling PGA,which indicates that the long-period structures is more sensitive to the velocity spectrum than the acceleration spectrum.As a result,the time history analysis is suggested to be used as the PGV amplitude modulation manner for long-period structures.关键词
建筑科学/地下建筑/远场地震动/近场地震动/长周期结构/基底剪重比Key words
building science/substructure/far-field ground motion/near-field ground motion/long-period structure/seismic base shear coefficient分类
建筑与水利引用本文复制引用
管民生,杜宏彪,曾庆立,蔡威,崔杰..远场地震作用下长周期结构的基底剪重比[J].深圳大学学报（理工版）,2017,34(5):488-494,7.基金项目
深圳市科技基础研究资助项目(JCYJ20160331114415945,JCYJ20150324141711689)Intellectual Innovation Program of Shenzhen Science and Technology Innovation Committee (JCYJ20160331114415945,JCYJ20150324141711689) （JCYJ20160331114415945,JCYJ20150324141711689）
