摘要
为了探究大跨空间结构需考虑行波效应的临界视波速,采用时程分析法对不同结构形式、不同几何尺寸的双层柱面网壳进行多视波速多点输入与一致输入的对比分析,研究结构间的地震响应规律。结果表明:任何视波速下的行波效应对横杆及腹杆无明显不利影响,对纵杆不利影响较大,且下弦纵杆内力普遍极小而上弦纵杆内力较大;支座间距的改变对行波效应有较小影响,而视波速对行波效应的影响与结构形式、结构几何尺寸等变量有关。可见,分析此类结构行波效应仅需针对上弦纵杆,而任一结构需考虑行波效应的临界视波速皆需单独分析。
In order to research the critical apparent wave velocity of long-span spatial structures considering traveling wave effect,the time-history method was used to investigate the seismic response of double-layer cylindrical latticed shells with different structural styles and geometric sizes under multiple-support excitation with kinds of apparent wave velocities and single excitation.The results showed that the traveling wave effect with any apparent wave velocity had no obviously disadvantaged effect on transverse and web members,but had a great disadvantaged effect on longitudinal members,in which the internal force was small at the bottom chord and large at the top chord.Changing the spacing of supports had little effect on the traveling wave effect,while the effect of apparent wave velocity on the traveling wave effect was related to the structural style and geometric sizes and so on.It was concluded that only the longitudinal members at the top chord were needed for the research of the traveling wave effect,and the critical apparent wave velocity of any structure considering traveling wave effect should be analyzed separately.
作者
周小龙
贾吉龙
周占学
郝勇
刘宏波
陈洪运
胡建林
ZHOU Xiaolong;JIA Jilong;ZHOU Zhanxue;HAO Yong;LIU Hongbo;CHEN Hongyun;HU Jianlin(Hebei University of Architecture,Zhangjiakou 075000,China;Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-Disaster of Civil Engineering,Zhangjiakou 075000,China)
出处
《工业建筑》
北大核心
2023年第2期129-132,50,共5页
Industrial Construction
基金
国家自然科学基金项目(51878242)
河北省省属高等学校基本科研业务费研究项目(2022QNJS06,2021QNJS02,2021QNJS07)
河北省高等学校青年拔尖人才计划(BJ2020010)
张家口重点研发计划项目(2221210D)
关键词
双层柱面网壳
地震响应规律
几何尺寸
行波效应
视波速
double-layer cylindrical latticed shell
seismic response law
geometric size
traveling wave effect
apparent wave velocity
作者简介
第一作者:周小龙,男,1988年出生,硕士,讲师。电子信箱:819061818@qq.com
