混凝土箱梁截面稳态温度场的径向基函数配点法反演  

Radial Basis Function Collocation Method Inversion of Steady-state Temperature Field of Concrete Box Girder Cross-section

作　　者：孙维刚 张筱雨[2] 秦煜[3] 许军才 SUN Weigang;ZHANG Xiaoyu;QIN Yu;XU Juncai(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Highway,Chang'an University,Xi'an 710064,China;CREEC(Chongqing)Survey,Design and Research Co.Ltd.,Chongqing 400023,China;College of Mechanics and Materials,Hohai University,Nanjing 210098,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]长安大学公路学院,西安710064 [3]中铁二院重庆勘察设计研究院有限责任公司,重庆400023 [4]河海大学力学与材料学院,南京210098

出　　处：《北京工业大学学报》2020年第3期275-279,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(51408083);陕西省交通运输厅科技资助项目(17-15K);中铁二院科学技术研究计划资助项目(14126146)。

摘　　要：为了解决混凝土箱梁温度效应分析过程中,对箱梁温度场进行仿真时,边界条件难以确定的问题,采用一种基于节点建模的无网格法数值计算理论,并基于无网格法理论的配点法,建立混凝土箱梁径向基函数配点法模型,对混凝土箱梁截面的稳态温度场反分析进行研究.研究结果表明,径向基函数配点法不仅能有效对混凝土箱梁温度场进行数值分析,而且能对缺失边界条件的混凝土箱梁温度场进行直接计算,无网格计算结果和有限元法结果吻合度较高.To solve the problem that it is difficult to determine the boundary condition when the temperature field of box girder is simulated in the process of temperature effect analysis for concrete box girder,a numerical calculation theory of meshless methods based on node modeling was adopted,a radial basis function collocation method model of concrete box girder was established based on the collocation method of meshlless method theory,and the steady-state temperature field inverse analysis of the cross-section of concrete box girder was studied.The research results show that the radial basis function collocation method can not only be used to conduct the numerical analysis of temperature field of concrete box girder,but also to calculate directly the temperature field of concrete box girder that is absent of boundary conditions,and there is high degree of consistency compared to calculated results of the finite element method.

关 键 词：边界条件 混凝土箱梁温度场 径向基函数配点法 数值分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]