中空内模钢丝网水泥墙板轴压性能试验

Axial compression performance test of hollow inner mold steel wire mesh cement wallboard

为研究中空内模钢丝网水泥墙板的轴压承载力和破坏模式,进行了4块中空内模钢丝网水泥墙板的轴压性能试验。其中1块水泥墙板作为对比试件,其余3块分别改变砂浆面层厚度和水泥墙板高厚比参数,研究其对水泥墙板轴压性能的影响。结果表明:水泥墙板的轴压破坏模式分为局部受压破坏和中轴面劈裂破坏,呈现明显的脆性破坏现象,在墙板达到峰值承载力之前破坏特征并不明显,破坏后承载力下降较快且变形较大;增加水泥墙板的面层厚度能显著提高墙板的轴压承载能力,但不能明显改变水泥墙板的延性性能,其中厚度为130mm墙板的极限荷载是120mm墙板的1.32倍;降低水泥墙板高厚比能够提高墙体的极限承载能力和延性性能,其中高度为2100mm和1500mm墙板的极限荷载分别是2700mm墙板的1.36倍和1.26倍。

In order to study the axial compression capacity and failure mode of hollow inner mold steel wire mesh cement wallboard,the axial compression performance tests of four hollow inner mold steel wire mesh cement wallboards were carried out.One cement wallboard was used as a comparison specimen,and the other three were changed respectively in mortar surface layer thickness and cement wallboard height-thickness ratio,The influence of this method on the axial compression performance of cement wallboard was studied.The results show that the axial compression failure modes of cement wallboard are divided into local compression failure and axial plane splitting failure,showing obvious brittle failure phenomenon.The failure characteristics of wallboard are not obvious before reaching the peak bearing capacity,and the bearing capacity declines rapidly and the deformation is large after failure;Increasing the surface thickness of cement wallboard can significantly improve the axial compressive bearing capacity of cement wallboard,but can not change the ductility of cement wallboard,The ultimate load of 130mm wall plate is 1.32 times that of 120mm wall plate;Reducing the ratio of height to thickness of cement wallboard can improve the ultimate bearing capacity and ductility of the wall,The ultimate load of 2100mm and 1500mm wall panels is 1.36 times and 1.26 times of that of 2700mm wall panels respectively.