动载下冻土区温度变化对桩基受力影响数值分析  

Numerical simulation analysis of influence of temperature variations on the pile force in permafrost zone under dynamic loads

作　　者：周云东[1] 刘云波[1] 杨德[1] 

机构地区：[1]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《河北工程大学学报（自然科学版）》2016年第1期11-15,23,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(50808067)

摘　　要：为了研究温度变化对冻土区桩基础在地震荷载下特性的影响本文运用MIDAS/GTS有限元数值分析软件讨论了地震作用下不同温度对单桩基础受力性能的影响,并通过数值计算得出不同模型状况下的特征值、相对位移和弯矩曲线,并与实际值进行对比分析。结果表明,地震下温度升高会使桩基础反应变大,桩基础更容易失稳破坏。In order to study the influence of the temperature change on load characteristics of pile foundation in permafrost region,this paper analyze the effects of different temperatures on the mechanical behavior of pile foundation under earthquake by using MIDAS / GTS finite element analysis software. The characteristic values,the relative displacement and bending moment curve under the condition of different models were obtained through numerical calculations. Combining with the actual value of comparative analysis,the results showed that increase of temperature has great effect on pile foundation during earthquake,pile foundation is easy to be broken.

关 键 词：冻土区 地震荷载 温度变化 桩基础受力响应分析 MIDAS/GTS数值模拟 

分 类 号：TU475[建筑科学—结构工程]