考虑土与结构接触效应的动力相互作用分析
|
摘要
采用动力有限元时程分析方法,利用大型通用有限元软件MARC,对土-桩基础-框架结构相互作用的接触效应问题进行了数值研究,以野外大比例桩基础框架模型为算例,探讨了在地震荷载作用下土-桩基础-框架结构三维接触效应。结果表明考虑接触效应后,结构柱子上的弯矩、剪力、内力明显减小。对结构附近的土体作用也有一定的影响,影响很小,可以忽略不计。计算表明强震作用下动力时程分析计算时应考虑接触效应。
This article uses the dynamic finite element time interval analysis method, makes use of the large-scale general finite element software MARC ,and the numerical research has been used in the interface effect problem which to the soilpile-frame structure mutually affects. As calculates example, the great proportion box foundation model to the open air is used, it has discussed the soil-pile-frame structure in three dimensional interface effects under the earthquake load. The result indicated that after consideration of interface effect, the structure pillar moment, the shearing force, the axis strength obviously reduces. It also has the certain influence to nearby soil, but the effect is very slightly, so it can be ignored. Under macroseism when dynamic time interval analysis should consider the contact effect.
This article uses the dynamic finite element time interval analysis method, makes use of the large-scale general finite element software MARC ,and the numerical research has been used in the interface effect problem which to the soilpile-frame structure mutually affects. As calculates example, the great proportion box foundation model to the open air is used, it has discussed the soil-pile-frame structure in three dimensional interface effects under the earthquake load. The result indicated that after consideration of interface effect, the structure pillar moment, the shearing force, the axis strength obviously reduces. It also has the certain influence to nearby soil, but the effect is very slightly, so it can be ignored. Under macroseism when dynamic time interval analysis should consider the contact effect.
引文
1 徐礼华,刘祖德.上部结构-桩基础-地基相互作用体系地震反应分析[J].岩石力学与工程学报,2002,21(11) :1720-1723
2 武芸.大比例土-桩基-框架模型动力相互作用试验模拟分析[硕士学位论文][D].长沙:湖南大学,2005
3 吕爱钟,蒋斌松,尤春安.位移反分析有限元网格划分范围的研究[J].土木工程学报,1999,32(1) :26-30
4 陈波,吕西林,李培振.用ANSYS模拟结构-地基动力相互作用振动台试验的建模方法[J].地震工程与工程振动,2002,22(1) :126-131
2 武芸.大比例土-桩基-框架模型动力相互作用试验模拟分析[硕士学位论文][D].长沙:湖南大学,2005
3 吕爱钟,蒋斌松,尤春安.位移反分析有限元网格划分范围的研究[J].土木工程学报,1999,32(1) :26-30
4 陈波,吕西林,李培振.用ANSYS模拟结构-地基动力相互作用振动台试验的建模方法[J].地震工程与工程振动,2002,22(1) :126-131
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心