内聚力模型在钢-竹组合梁变形分析中的应用  

The Application of Cohesive-Zone Models in Deformation Analysis of Steel Bamboo Composite Beams

作　　者：许达 李玉顺[1] 张振文[1] 翟佳磊 解其铁[1] XU Da;LI Yu-shun;ZHANG Zhen-wen;ZHAI Jia-lei;XIE Qi-tie(Department of Civil Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学

出　　处：《林产工业》2018年第8期42-47,共6页China Forest Products Industry

基　　金：国家自然科学基金项目(51678310);宁波市自然科学基金(2017A610305)

摘　　要：钢-竹组合结构的界面是由竹胶板和冷弯薄壁型钢通过结构胶粘接形成的,为解决有限元分析中界面处理的问题,采用内聚力单元,以此为基础建立钢-竹组合双搭接试件及工字形梁的有限元模型对其进行数值分析,同时制作3个不同搭接长度作为参数的双搭接试件和5根不同规格的组合梁进行静力加载试验,绘制荷载-位移曲线与模拟结果进行对比。研究结果表明:组合梁界面破坏主要发生在翼缘部分,其变形曲线主要由两部分组成且均呈线性分布,界面损伤后梁的刚度下降明显;两种试件的试验结果与有限元结果均吻合良好,误差均在10%以内;组合梁界面胶层的破坏过程与试验观察到的结果相同;内聚力模型模拟钢-竹界面具有一定的可靠性。The interface of the steel-bamboo composite structure is formed by the bonding of bamboo plywood and thin-wall steel through structural adhesive. In order to solve the problem of interface treatment in finite element analysis, the cohesive-zone models is adopted, based on this, a finite element model of steel-bamboo composite double-lap-shear specimen and I-section beam is established and numerical analysis of it. At the same time, 3 double-lap specimens with different lap lengths as parameters and 5 composite beams with different specifications were subjected to static loading. The load displacement curves were plotted and compared with the simulation results. The results show that the two kinds of specimens with the finite element results and test results are in good agreement; composite beam interface layer failure process and test results are similar; The interface failure of the composite beam occurs mainly in the part of flange; The deformation curves of composite beams are mainly composed of two parts both are linear; The stiffness of the beam is decreased obviously when interface damaged; The cohesive-zone models has a certain reliability in simulating the steel-bamboo interface.

关 键 词：内聚力模型 界面 有限元分析 组合梁 变形分析 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]