基于宏观建模方法的胶合木-钢夹板螺栓连接数值模拟  

Numerical simulation of bolted connections with steel plate in glued wood based on the macroscopic modeling method

作　　者：陈爱军[1] 贺国京[1] 王智丰[1] 王解军[1] CHEN Aijun;HE Guojing;WANG Zhifeng;WANG Jiejun(School of Civil Engineering,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]中南林业科技大学土木工程学院,湖南长沙410004

出　　处：《铁道科学与工程学报》2020年第5期1244-1251,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51578554);国家林业公益性行业科研专项经费资助项目(201304504);现代木结构工程材制造及应用技术湖南省工程实验室开放基金资助项目(HELFMTS1705);湖南省教育厅科研基金资助项目(19A526,16C1665)。

摘　　要：为解决胶合木-钢夹板螺栓连接三维有限元模型计算效率低、收敛性差的问题,采用一种有限元宏观建模方法进行胶合木-钢夹板螺栓连接的模拟,该方法通过非线性一维单元的组合,从而简化连接节点性能的有限元计算。同时,结合胶合木-钢夹板螺栓连接件抗剪性能试验,建立各连接节点的宏观模型和传统三维有限元模型。通过对比试验结果与宏观模型的计算结果,来验证该有限元宏观模型的计算效率及计算精度。研究结果表明:胶合木-钢夹板螺栓连接的宏观模型与连接件抗剪性能试验的荷载-滑移曲线是一致的,该宏观模型能够正确反映胶合木-钢夹板螺栓连接节点的剪切性能、滑移特性、滞回性能、刚度退化和失效特性。相比传统三维有限元计算方法,有限元宏观模型的计算成本相对较低,且收敛性较好。有限元宏观建模方法可有效提高具有大量连接的复杂结构非线性分析的计算效率。In order to solve the problems of low efficiency and poor convergence of the 3D finite element model of bolted connections with steel plate in glued wood, a finite element macro modeling method was adopted. This method was used to simulate the bolted connections with steel plate in glued wood through the combination of nonlinear elements, and simplified the finite element calculation of the node performance of bolted connections with steel plate in glued wood. At the same time, the macroscopic model and the traditional 3D finite element model of each connections were established based on the test of the shear behavior of the connection joints of glued laminated timber connections with steel plate. The computational efficiency and precision of the finite element macroscopic model were verified by comparing the results of the macroscopic model with the traditional finite element model and the experimental results of mechanical properties. The traditional finite element model, macro model and mechanical test results of bolted connections with steel plate in glued wood are consistent with each other. The macro model can correctly reflect the shear properties, slip characteristics, hysteretic behaviors, stiffness degradation and failure characteristics of the bolted connections with steel plate in glued wood. Compared with the traditional 3D finite element method, the calculation cost of the macro model is relatively low, and the convergence is good. The finite element macro modeling method can effectively improve the computational efficiency of nonlinear analysis of complex structures with large number of connections.

关 键 词：宏观建模方法 胶合木-钢夹板螺栓连接 宏观模型 数值模拟 剪切性能 

分 类 号：TU311[建筑科学—结构工程]