工字型夹层板弱方向抗弯性能研究  

Research on flexural behavior ofⅠ-core sandwich panels in weak direction

作　　者：朱木锋 陆铁坚[2] 宋宁[2] 王鹏皓 杨诗龙 

机构地区：[1]江西省交通工程质量监督站,江西南昌330009 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2014年第6期30-37,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51078354);湖南省自然科学基金重点资助项目(10JJ2034)

摘　　要：工字型夹层板是由上下两块表层板和它们之间按照单方向排列的腹板组成,这种类型的夹层板在夹层板方向有较强的抗弯和抗剪能力,在垂直于腹板长度方向上夹层板的刚度较弱,因此该方向称为弱方向。考虑到工字型夹层板的表层板和钢芯之间的相互作用,给出了在弱方向上腹板夹层板静力抗弯下挠度计算方法,通过Abaqus软件,建立有限元模型,进行实例分析。研究结果表明:工字钢的翼缘宽度与高度的变化对夹层板受跨中集中荷载在弱方向的挠度的变化的影响不大,该挠度计算方法在1.25<t3/t2<2.0,0.7<t1/t3<1.6,0.3<l/h<0.8,1.4<s/h<6时可以应用。An I-core sandwich panel is consisted of two facing plates and a I-core stiffener which is placed in a single direction.This type sandwich plate has high bending performance and shear stiffness in the direction of the core placement,while the stiffness of the I-core sandwich plate on the direction perpendicular to the core placement is weak,which is called weak direction.Taking the contact interaction between the facing plates and the flanges of the I-core stiffener into account,the method for calculating the deflection of the I-core sandwich plate under bending in its weak direction was presented.Using software ABAQUS,the finite element model of this sandwich plate was built for case study.The computational results demonstrate that changes of the width and the height of the flange plates have little impact on deflection of the I-core sandwich plate under midspan con-centrated load in its weak direction,and the proposed method can be applied to actual projects under the condi-tion of 1.25 〈t3/t2 〈2.0,0.7〈t1/t3 〈1.6,0.3〈l/h〈0.8,1.4〈s/h〈6.

关 键 词：工字型夹层板 抗弯性能 弱方向 理论公式 适用范围 

分 类 号：TU311.1[建筑科学—结构工程]