摘要
大型渡槽槽身采用薄壁杆件结构 ,渡槽支架与槽身采用盆式橡胶支座连接 ,根据此结构特点 ,提出了大型渡槽结构地震响应分析模型。该模型综合考虑了渡槽槽身横向弯扭耦合振动、约束扭转变形、渡槽支架变形和盆式橡胶支座等对渡槽动力响应的影响。采用能量原理给出了渡槽梁段单元的刚度矩阵、质量矩阵和阻尼矩阵的表达式。具体计算了某大型渡槽的地震响应 ,计算结果表明 :本文模型计算渡槽结构的地震时程响应与大型结构分析程序SAP93计算的结果十分接近 ,但本文方法相当简单 ,计算工作量小 ,使用方便 。
A model of the seismic response analysis for a large?scale aqueduct is proposed in the paper.It is based on the thin?walled structural characteristic of an aqueduct body and with its attachments.The influence of dynamic actions on the aqueduct is considered.These are the traversal bend?twisted vibration,restraint twisting deformation,brace deformation,and rubber supports with basin shape.An element stiffness matrix,mass mattrix and damping matrix of a space beam element are derived by the energy principle.The seismic time history response of a large?scale aqueduct is examined.The computing results are agree well with that of other structural analysis program.It is confirmed that the proposed model is simple and feasible
出处
《土木工程学报》
EI
CSCD
北大核心
2001年第3期29-34,共6页
China Civil Engineering Journal
基金
河南省杰出青年科学基金资助项目 [豫科计字 (1 998) 2 8号 ]
