体外预应力钢-混凝土组合梁非线性有限元分析  

Finite-element menthod research on nonlinear analysis of externally prestressed steel-concrete composite beams

作　　者：郑则群[1] 房贞政[1] 

机构地区：[1]福州大学结构工程研究所,福建福州350108

出　　处：《福州大学学报（自然科学版）》2009年第6期879-888,共10页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(2009J5123)

摘　　要：为了研究体外预应力钢—混凝土组合梁受力非线性力学性能,在已开展的预应力组合梁试验系统研究基础上,应用ABAQUS有限元程序考虑了剪力连接件界面传力机制和材料非线性及几何非线性,建立了非线性有限元模型模拟预应力钢-混凝土组合梁加载软化段的全过程加载历程.有限元分析进行了算例比较、试验结果对比,并且开展了正负弯矩区预应力钢-混凝土组合梁配筋率、预加力、剪力连接程度等参数分析.所得结果为体外预应力钢-混凝土组合梁非线性研究提供借鉴及参考.In order to investigate of the nonlinear behaviors, based on completed systematical experiments of externally prestressed steel - concrete beams, by ABAQUS program the accurate nonlinear finite- dement models are erected to simulate static behaviors through all the loading range including soften loading stage, taking account about the shear connectors mechanical characteristic, material nonlinearity and geometrical nonlinearity. The static behaviors such as the prestress increment, the ultimate flexural strength are predicted and analyzed by the program. Verifications by typical example and tests are carried out. In the nonlinear finite - element model the parameters of prestress steel - concrete beam at positive or negative moment region are considered such as rebar ratio, prestressing load, shear connection degree ect. It shows that the results are valuable for nonlinearity research of externally prestressed steel- concrete beam.

关 键 词：体外预应力 钢 混凝土 组合梁 非线性 有限元 

分 类 号：TU398.9[建筑科学—结构工程]