摘要
在大型水利工程的温度场和应力场仿真计算中,为了简化建模,对于埋设混凝土桩的情况,有时以桩和周围地基组成的长方体作为一个等效体代替桩基,其等效参数往往采用体积等效法取值,但其计算结果与工程实际存在一定的差异。为研究此问题,以某水闸工程作为计算模型,将桩、土基精细建模的计算结果作为精确解,与整体桩基等效后的计算结果进行对比分析,得到等效桩基的热学参数等效系数α和力学参数等效系数β,等效桩基的力学参数等效系数β和土基的弹性模量成线性关系,等效桩基的热学参数等效系数α取值范围为[0. 8,1. 0]。此结果可为实际应用提供参考。
When calculating the temperature field and stress field of large-scale hydraulic engineering,the cuboid formed by the pile and the surrounding foundation is sometimes used as an equivalent body instead of the pile foundation in order to simplify the modeling in the case of burying concrete piles.The equivalent parameters usually adopt the value of volume equivalence,but the calculation results are different from those of engineering.In this paper,taking a sluice engineering as a calculation model,the exact solution of the fine modeling is compared with the result of calculation of the equivalent of integral pile foundation.Through calculating,the equivalent coefficient of thermal parametersαand the mechanical parametersβwere obtained.The results show that the equivalent coefficient of the mechanical parametersβhas a linear relation with the elastic modulus of the foundation,and the value of the equivalent coefficient of thermal parametersαshould be in the range of 0.8~1.0.
作者
张智沛
杨峰
强晟
裘华锋
张南南
ZHANG Zhipei;YANG Feng;QIANG Sheng;QIU Huafeng;ZHANG Nannan(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Chushandian Reservoir Construction Administration Bureau of Henan Province,Zhengzhou 450004,China;Zhejiang Design Institute of Water Conservancy and Hydroelectric Power,Hangzhou 310002,China)
出处
《华北水利水电大学学报（自然科学版）》
2019年第1期79-84,共6页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
国家自然科学基金面上项目(51679074)
关键词
仿真计算
混凝土温度场
混凝土应力场
桩基的热学和力学参数
等效系数
simulating calculation
concrete temperature field
concrete stress field
thermodynamic parameters of the pile foundation
equivalent coefficient
