摘要
为了探究双层柱面网壳需考虑行波效应的临界视波速,采用时程分析法对不同几何尺寸简化结构模型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,下弦纵杆内力普遍极小而上弦纵杆内力较大;视波速达到3000~4000 m·s^(-1)后继续增大视波速对行波效应几乎没有影响;结构支座间距变化会导致行波效应影响范围变化。可见,分析此类结构行波效应仅需针对上弦纵杆,需考虑行波效应的临界视波速可视为4000 m·s^(-1),而结构刚度分布变化会改变行波效应影响范围。
In order to research the maximum apparent wave velocity of considering double-layer cylindrical latticed shells about traveling wave effect,the time-history method was used to investigate seismic response of simplified structural model with different geometry sizes under multiple-support excitation with kinds of apparent wave velocities and single excitation.The results show that the traveling wave effect with any apparent wave velocity has no obviously disadvantaged effect on transverse and web members and greatly disadvantaged effect on longitudinal members,which internal force is small at the bottom chord and large at the top chord.The increase of apparent wave velocity has no effect on traveling wave effect when it reaches 3000 m·s^(-1)~4000 m·s^(-1).The change of distances between the supports will lead to the change of range the traveling wave effect affects.It is concluded that only the longitudinal members at the top chord are needed for the research of the traveling wave effect,and the maximum apparent wave velocity of considering about traveling wave effect is 4000 m·s^(-1),and the change of distribution of structural stiffness will lead to the change of range the traveling wave effect affects.
作者
周小龙
贾吉龙
郝勇
张玉栋
胡建林
王佳琪
ZHOU Xiao-long;JIA Ji-long;HAO Yong;ZHANG Yu-dong;HU Jian-lin;WANG Jia-qi(School of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000,China;Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Zhangjiakou 075000,China)
出处
《河北建筑工程学院学报》
CAS
2022年第4期9-14,共6页
Journal of Hebei Institute of Architecture and Civil Engineering
基金
河北省省属高等学校基本科研业务费研究项目(2022QNJS06)
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
geometry size
traveling wave effect
apparent wave velocity
作者简介
周小龙(1988-),男,讲师,研究方向:大跨空间结构抗震设计。
