摘要
承台是桥梁结构中连接桥梁墩柱与桩基的主要受力与传力构件,一般分析时均假定为刚体。为了研究地震作用下承台的受力性能,首先阐述了在静力条件下承台刚体假定所需满足的条件;通过改变承台的厚度,即承台的自身刚度,建立实体有限元模型与简化刚体假定有限元模型,通过两者之间的比较,分析在静力条件下得出的承台刚体假定条件在地震作用下是否仍具有一定的适用性。结果表明,通过静力方法得出的承台刚体假定的条件在地震作用下具有一定的适用性,但是仍存在一定修正的空间。
As the main force and the force transmission member,the pile caps connect the bridge pier columns and piles foundation in the bridge structure,and is generally assumes to be the rigid body for analyzing.In order to researching the mechanical behavior of pile caps under earthquake,firstly,we introduce the meeting condition when the pile cap assumed as rigid body in static condition.By changing the thickness of the cap,which is also the pile caps under different stiffness,we build solid finite element model and simplified rigid assumption finite element model.Based on the comparison of these two models,we analyze the pile cap in rigid body assumptions condition obtained in static condition whether still has certain applicability under the earthquake.The results show that the assumption condition has certain applicability,however,it is still need to correction.
出处
《地震研究》
CSCD
北大核心
2014年第1期94-98,共5页
Journal of Seismological Research
关键词
桩基承台
刚体假定
静力条件
有限元模型
地震作用
pile-caps
rigid body assumptions
static condition
finite element model
earthquake action
