不同桥梁结构多尺度建模方法比选  

Comparison and Selection of Multi-Scale Modeling Methods for Different Bridge Structures

作　　者：张凡[1] 贾明晓[1] 刘祖军[1] 马帅[2] ZHANG Fan;JIA Ming-xiao;LIU Zu-jun;MA Shuai(North China University of Water Resources and Electric Power,Zhengzhou,Henan,450045,China;Nanyang Sewage Purification Center,Nanyang,Henan,473000,China)

机构地区：[1]华北水利水电大学,河南郑州450045 [2]南阳市污水净化中心,河南南阳473000

出　　处：《建材技术与应用》2021年第1期7-12,共6页Research and Application of Building Materials

基　　金：国家自然科学基金(51508190);堤防安全与病害防治工程技术研究中心开放基金项目(201502)。

摘　　要：基于有限元软件ANSYS建立一四跨连续箱梁桥的精细模型和多尺度模型,分别利用MPC多点约束法、RBE3表面约束法、CERIG表面约束法、建立约束方程法连接多尺度模型,对五种模型在自重、桥面铺装两种工况下进行静力分析和模态分析,验证各方法的精度和合理性。分析结果表明,在静力分析中MPC法对不同单元之间的位移变形协调的模拟与实际最为相符,CERIG法和MPC法能对不同单元之间的应力协调的模拟与实际最为相符,并且均能很好地模拟结构的震动特性。Using the finite element software ANSYS,this paper establishes the fine model and multi-scale model of a four-span continuous box girder bridge,and connects the multi-scale models by using MPC multi-point constraint method,RBE3 surface constraint method,CERIG surface constraint method,and establishing constraint equation method respectively.It carries out the static analysis and modal analysis of the five models under two working conditions of self weight and deck pavement,and verifies the accuracy and rationality of each method.The results show that,in the static analysis,the MPC Method for the simulation of displacement and deformation coordination between different elements is the most consistent with the reality,and the CERIG method and MPC Method for the simulation of stress coordination between different elements are the most consistent with the reality,and both can well simulate the vibration characteristics of the structure.

关 键 词：多尺度 界面连接 有限元 

分 类 号：U446.2[建筑科学—桥梁与隧道工程]