水泥膨胀珍珠岩板抗弯性能试验研究

Experimental Study and Finite Element Analysis on Flexural Behavior of Cement Expanded Perlite Composite Exterior Wall Panels

摘要: 为研究水泥膨胀珍珠岩板的抗弯性能，完成了6个不同配筋形式、厚度的试件抗弯承载力试验。对不同设计参数试件的破坏形态、荷载位移曲线、钢筋应变、变形能力进行了分析，建立了水泥膨胀珍珠岩板正截面抗弯承载力计算公式，研究了其抵抗风荷载、地震作用及楼面均布荷载能力。试验与理论分析结果表明：配置有钢筋或钢丝网架 + 钢筋的水泥膨胀珍珠岩板具有良好的延性性能、塑性变形能力，受弯承载力计算值与试验值吻合较好；具有较好的抵抗风荷载、地震作用及楼面均布荷载能力，满足正常使用极限状态和承载能力极限状态要求，安全储备较高，可应用于装配式建筑工程外墙板、隔墙板及楼板。仅采用镀锌钢丝网架的水泥膨胀珍珠岩板，承载力很低、变形能力差，不适用于外墙板和楼板。

Abstract: To study the flexural behavior of cement expanded perlite slabs, six specimens under bending were tested. The effects of the reinforcement arrangement and the thickness on the failure modes, load-displacement curves, reinforcement strain and deformation capacity of the specimens were analyzed. Calculation formulas of normal section flexural capacity were established. The capacity of resistance to wind load, earthquake action and uniform floor load was researched. Research results indicate that cement expanded perlite slabs with rebars or galvanized steel wire grid plus rebars have favorable ductility, plastic deformation capacity, capacity of resistance to wind load, earthquake action and uniform floor load, and higher safety performance. The theoretical results of flexural capacity agreed well with the experimental results. The flexural behavior of cement expanded perlite slabs could meet the requirements of serviceability limit stage and bearing capacity limit state. They can be applied to exterior wall panels, internal partition walls, and floor slabs of prefabricated construction engineering. Cement expanded perlite slabs with galvanized steel wire grid have lower bearing capacity and deformation capacity, which cannot be applied to exterior wall panels and floor slabs.