摘要
为研究芯管交错排布的不锈钢芯板楼板受竖向荷载作用下的弯曲性能与剪切性能,对五个不同尺寸的不锈钢芯板单向板足尺试件以及一个跨中布置内隔板的不锈钢芯板双向板足尺试件进行试验研究与有限元模拟,对比两者结果验证了有限元模型的准确性,在此基础上对不锈钢芯板楼板的受力机理及弯曲刚度和剪切刚度进行分析,最后对不锈钢芯板楼板性能进行参数分析。试验及分析结果表明:不锈钢芯板楼板具有良好的静力学性能;不锈钢芯板楼板的变形以剪切变形为主,抗剪强度远小于抗弯强度;不锈钢芯板楼板的受力机理类似于空间空腹网架结构,相邻芯管之间面板的中点处可以近似认为面板仅有剪力和轴力而无弯矩,并提出了芯板单元的简化受力模型;芯管交错排布的不锈钢芯板楼板弯曲性能可以认为是正交各向同性的,剪切性能是正交各向异性的;面板厚度是影响剪切刚度的最主要因素;布置隔板可以有效提高不锈钢芯板楼板的承载力且降低挠度。
In order to study the bending performance and shear performance of stainless steel core plate floor with staggered arranged core tubes under vertical load, five unidirectional plates of stainless steel core plate full-scale specimens and a bidirectional plate of stainless steel core plate full-scale specimen with a clapboard in the middle were tested and finite element simulation was carried out. Comparison of the two results verifies the accuracy of the finite element model. On this basis, mechanical principle and the bending stiffness and shear stiffness of the stainless steel core plate floor were analyzed, finally the influence of different parameters on the performance of the stainless steel core plate floor was analyzed. The test and analysis results show that stainless steel core plate floor has good static performance. The deformation of the stainless steel core plate floor is mainly shear deformation and the shear strength is much smaller than the bending strength. The mechanical mechanism of the stainless steel core plate floor is similar to the space truss structure, at the midpoint of the panels between adjacent core tubes, the panels are considered to have only shear and axial forces. A simplified stress model of the core plate unit was proposed. The shear stiffness of the stainless steel core plate is much smaller than the bending stiffness. The bending performance of the stainless steel core plate with staggered arranged core tubes is isotropic and the shear performance is orthotropic. The thickness of the panel is the most important factor affecting the shear stiffness. The arrangement of the partition plate can effectively improve the bearing capacity of the stainless steel core plate floor and reduce the deflection.
作者
舒兴平
黄毅恒
SHU Xingping;HUANG Yiheng(Steel Structural Institute of Civil Engineering College,Hunan University,Changsha 410082,China)
出处
《建筑结构》
CSCD
北大核心
2022年第18期99-107,共9页
Building Structure
基金
国家自然科学基金项目(51778219)。
关键词
不锈钢芯板
夹层板结构
芯管交错排布
三点弯曲试验
受力机理
有限元分析
stainless steel core plate
sandwich plate structure
staggered arranged core tube
three-point bending test
mechanical principle
finite element analysis
