预制超高性能组合式夹心墙板受压承载力研究

Research on Compressive Bearing Capacity of Precast Ultra-high Performance Composite Sandwich Wallboard

对一种新型预制超高性能组合式夹心保温墙板受压性能进行数值模拟并对现有计算公式进行了改进,采用ABAQUS软件分析了墙板的高厚比、边界条件、面层材料、夹心层材料及连接形式等参数对受压性能的影响,分析结果表明:面层材料对墙板的受压极限承载力影响较大,使用超高性能混凝土(UHPC)的墙板极限承载力较采用C30混凝土的墙板极限承载力平均提升了228%;当墙板厚度一定时,高厚比对墙板的受压极限承载力影响较小,当墙板高度一定时,降低高厚比会显著提升墙板的受压极限承载力;边界条件对墙板的受压极限承载力影响较大,而夹心层材料及连接件形式对墙板受压极限承载力的影响几乎可以忽略。同时拟合了墙板高厚比和稳定系数之间的函数关系,改进了墙板的受压承载力计算公式,为工程实践提供理论参考。

The numerical simulation and theoretical derivation of the compression performance of a new type of prefabricated ultra-high performance composite sandwich insulation wall plate are carried out in this paper. The ABAQUS software is used to analyze the influence of the wall plate height-thickness ratio, boundary conditions, surface material, sandwich material and connection form on the compression performance. The analysis results show that the surface material has a great influence on the ultimate bearing capacity of the wall panel, and the ultimate bearing capacity of the wall panel using ultra-high performance concrete is 228% higher than that of the wall panel using C30 concrete on average;When the thickness of the wallboard is constant, the compression ultimate bearing capacity of the wallboard with the height-thickness ratio is small. When the height of the wallboard is constant, reducing the height-thickness ratio will significantly improve the compression ultimate bearing capacity of the wallboard;The boundary conditions, sandwich layer materials and connector forms can almost be ignored for the compressive ultimate bearing capacity of wall panels. At the same time, the function relationship between the height-thickness ratio and the stability coefficient of the wall plate is fitted, and the calculation formula of the compressive bearing capacity of the wall plate is obtained, which provides a theoretical reference for engineering practice.