双拼缝叠合楼板破坏模式的损伤模型有限元分析  

Finite Element Analysis of Concrete Damage Plastic Model about Failure Modes of Lattice Girder Floor Slabs with Double Close-joints

作　　者：任彧 徐沛韬 REN Yu;XU Peitao(Fujian Construction Engineering Group Co.,Ltd.,Fuzhou 350001;Prefabricated Building Branch,Fujian Provincial Institute of Architectural Design and Research Co.,Ltd.,Fuzhou 350001)

机构地区：[1]福建建工集团有限责任公司,福建福州350001 [2]福建省建筑设计研究院有限公司现代房屋建筑研究设计分院,福建福州350001

出　　处：《福建建筑》2020年第10期38-47,共10页Fujian Architecture & Construction

基　　金：福建省科技重大专项“装配式混凝土建筑绿色建造关键技术与产业化示范应用研究”(项目编号:2019HZ07011)。

摘　　要：采用基于混凝土损伤模型的弹塑性有限元分析模型研究双拼缝构造对叠合楼板全过程受力性能影响。结果表明:双拼缝叠合楼板的刚度和极限承载力较整体板略有降低,但仍可满足承载能力极限状态的要求,并有足够的安全储备。利用拼缝构造附加钢筋的加强作用,可提高双拼缝叠合楼板受力性能。当可能出现非均布可移动的荷载工况时,建议对拼缝处设置必要的抗弯加强钢筋。In this paper,an elastic-plastic finite element analysis based on the concrete damage model was used to study the influence of double close-joint connection disposal on the mechanical properties of the lattice girder floor slabs. The results showed that the stiffness and ultimate bearing capacity of lattice girder floor slabs with double close-joints are slightly lower than the integral cast-in-site slabs.But they can still meet the requirements of the limited state of the carrying capacity and have sufficient safety reserves. The reinforced effect of additional structural reinforcement used at the joints can improve the mechanical performance of the lattice girder floor slabs with double close-joints. When there may be non-uniform and movable load conditions,it is recommended to set the necessary additional steel reinforcement at the joint to enhance the bending resistance of the slabs.

关 键 词：密拼缝叠合楼板 混凝土损伤模型 有限元分析 破坏模式 

分 类 号：TU3[建筑科学—结构工程]