预应力连续钢梁抗剪性能分析  

ANALYSIS OF SHEAR PERFORMANCE OF PRESTRESSED CONTINUOUS STEEL BEAMS

作　　者：王瑞 贾艳敏[1] 赵赟 王佳伟[1,2] WANG Rui;JIAYanmin;ZHAO Yun;WANG Jiawei(School of Civil Engineering,Northeast Forestry University,Harbin 150000,China;Liaoning Transportation Planning and Design Institute,Shenyang 110101,China)

机构地区：[1]东北林业大学土木工程学院,哈尔滨150000 [2]辽宁省交通规划设计院有限责任公司公路养护技术研究中心,沈阳110101

出　　处：《钢结构》2018年第10期47-50,54,共5页Steel Construction

基　　金：辽宁省交通科技项目(201512;201513)

摘　　要：介绍了有限元软件ANSYS的基本计算原理,并建立了普通连续钢梁和预应力连续钢梁仿真模型,通过普通连续钢梁试验和预应力连续钢梁试验证实了模型的合理性,再通过有限元模型分析了在不同张拉力作用下连续梁的切应力和抗剪刚度,得出了预应力对连续钢梁切应力状态有一定的改善,对连续梁的抗剪刚度有所提升,随着张拉力的增大,抗剪刚度大小基本不变。连续梁的腹板厚度和布索方式对抗剪性能有不同的影响,相比于腹板厚度,预应力钢束对连续梁的抗弯刚度影响较大对抗剪刚度影响较小,双折点布索有利于本跨内刚度的提高,单折点布索有利于邻跨刚度,增大钢束在中支座处的弯起角度有利于腹板的抗剪但不利于跨中抗弯。The basic calculation principle of the finite element software ANSYS was introduced, and the simulation model of the ordinary continuous steel beam and the prestressed continuous steel beam was established. The rationality of the model was confirmed by the ordinary continuous steel beam test and the prestressed continuous steel beam test. Then the shear stress of the continuous beam under the action of different tensile forces was analyzed. The shear stiffness of the continuous beam was improved and the shear stiffness of continuous beam was improved. With the increase of tensile force, the size of shear stiffness does not change basically. The thickness of the continuous beam and the cable mode have different influence on the shear performance. Compared with the thickness of the web, the prestressed steel beam had less influence on the flexural rigidity of the continuous beam. The double fold point cable was beneficial to the increase of the internal rigidity, and the single point cable was favorable to the adjacent span stiffness and the steel beam was in the middle support. The bending angle was conducive to the shear resistance of the web, but it was not conducive to the mid span bending resistance.

关 键 词：预应力 连续钢梁 ANSYS 挠度 切应力 抗剪刚度 

分 类 号：TU394[建筑科学—结构工程]