摘要
大跨度结构抗震分析时通常忽略桩土相互作用的影响。首先推导出大跨度结构在考虑桩-土-结构相互作用时的不一致运动时程分析方程。其次利用ANSYS软件建立基础固接与考虑桩-土-结构相互作用的两种模型,其中桩-土相互作用利用根据相互作用因子推导出的土弹簧单元实现。然后对比两种模型在地震荷载作用下的响应。结果表明不同模型对不一致运动的敏感度是不同的,考虑桩-土-结构相互作用和不一致输入是符合客观事实的。
The influence of pile-soil interaction was often neglected in seismic analysis of long-span structures.The time history equation of long span structure is derived when the pile-soil-structure interaction is considered.Two models of foundation consolidation and pile-soil-structure interaction are established by using ANSYS software,in which pile-soil interaction is realized by soil spring element derived from interaction factors.The responses of the two models under seismic loads were compared.The results show that the sensitivity of different models to inconsistency is different,and it is consistent with the objective fact to consider the pile-soil-structure interaction and inconsistency input.
作者
熊辉
杨斌
XIONG Hui;YANG Bin(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China)
出处
《公路工程》
北大核心
2020年第5期9-14,共6页
Highway Engineering
基金
国家重点研发计划(2017YFC0703305)
国家自然科学基金(510781132)
教育部新世纪优秀人才支持计划项目(NCET-13-190)。
关键词
大跨度结构
桩土相互作用
动力分析
不一致运动
long-span structure
pile-soil interaction
dynamic analysis
inconsistent motion
