【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。更多还原

【Abstract】 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.更多还原