摘要
本文对某大型渡槽在多点地震输入激振时的动力反应进行了详细研究 .渡槽槽身采用薄壁梁段有限单元模型 ,考虑了渡槽槽身开口薄壁结构的横向弯扭耦合振动、约束扭转变形等结构自身特性 ;渡槽支架采用空间梁单元进行离散 .文中给出了大型渡槽在多点地震输入激振时动力反应的计算公式 ,并对某 1 0跨大型渡槽进行了具体数值计算 .研究表明 :考虑多点地震输入激振时 ,虽然该大型渡槽各输出点的横向位移最大值较同步地震输入激振时有所减少 ,但是各伸缩缝的横向相对折角最大值却普遍增大 ;该大型渡槽各输出点的竖向位移最大值和各伸缩缝的竖向相对折角最大值普遍减小 .
In this paper, the dynamic response of large aqueduct to multi\|site earthquake input is studied in detail. Shell\|beam element model is applied to simulate the aqueduct body and the characteristics of transverse bending\|twisting vibration of an open\|shell as well as the restraint\|twisting deformation are being considered. The formula for computation of dynamic response is esablished The calculation result of a large aqueduct with 10 spans is given as an example.
出处
《水利学报》
EI
CSCD
北大核心
2000年第9期55-60,共6页
Journal of Hydraulic Engineering
关键词
大型渡槽
多点输入
地震响应
large aqueduct
earthquake
dynamic response
multi\|site
