波形钢腹板抗剪性能的研究  

Research on Shear Mechanical Property of Corrugated Steel Webs

作　　者：李立峰[1] 侯立超[1] 孙君翠 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]中铁十局济南勘察设计分公司,山东济南250001

出　　处：《湖南大学学报（自然科学版）》2015年第11期56-63,共8页Journal of Hunan University:Natural Sciences

基　　金：交通部推广应用项目;陕西省交通厅科技项目(12-21K);湖南省交通厅科技项目(201123)

摘　　要：为了研究波形钢腹板的抗剪受力性能,首先设计了4根波形钢腹板H型钢梁并进行屈曲加载试验,掌握了波形钢腹板屈曲的基本特征;统计国内外已建波形钢腹板组合桥的波形钢腹板尺寸参数、并对弹性屈曲强度的计算进行了分析,建议了弹性屈曲强度简化计算公式和适用范围;考虑局部弹性屈曲强度要小于整体弹性屈曲强度等参数范围,合理选取一批试验数据对Yi、聂建国等提出的波形钢板非线性剪切屈曲强度计算公式进行了对比分析,并通过ANSYS有限元程序对本文部分试验结果进行了分析验证.结果表明:波形钢腹板主要承担剪力且剪应力沿高度均匀分布;几何初始缺陷对其剪切屈曲强度的影响较明显;在工程应用范围内,文中建议的弹性屈曲强度和非线性剪切屈曲强度公式与试验值和有限元分析值吻合较好,精确度较高,可供工程设计参考.To study the shear mechanical property of corrugated steel webs, four H-shaped steel beams with trapezoidal corrugated steel webs were designed and tested to obtain the shear behavior of corrugated steel webs. In addition, the elastic bucking strength of the corrugated steel webs was discussed according to statistical data of their dimensions for the as-built PC composite box girders around the world. Then, we proposed the simplified computational formulae and the corresponding scope. Furthermore, considering that the local elastic bucking strength is less than global elastic bucking strength, the formulae for calcu- lating the nonlinear shear strength presented by Yi and NIE were studied on the basis of some test results, and the test results were verified by comparing the analysis results of ANSYS software. It is concluded that the shear force is mainly borne by the corrugated steel webs and the distribution of the shear stress a- long the height of the web is uniform. And the shear capacity of corrugated steel webs will be greatly af- fected by the initial imperfections. What is more, the proposed computational formulae for the elastic buc- king strength and nonlinear shear strength are in perfect accordance with the model test results and the numerical analysis results, so they can provide a reference for practical structural design.

关 键 词：钢腹板 抗剪试验 屈曲 弹性 非线性 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]