填充轻质浆料的预制冷弯型钢组合墙板轴压性能试验和承载力计算方法

EXPERIMENTS AND CALCULATION METHODS ON PERFORMANCE OF PREFABRICATED COLD-FORMED STEEL(CFS)COMPOSITE WALLS FILLED WITH LIGHT MORTAR UNDER AXIAL COMPRESSION

近年来我国大力推动绿色装配式农房发展,传统冷弯型钢墙板在农房中存在隔声差、承载力低、保温隔热弱等问题。为提高组合墙板性能和装配化程度,研发了一种填充轻质浆料的预制冷弯型钢组合墙板,进行了6片足尺组合墙板的轴压性能试验,对其破坏特征、轴压力-轴向位移关系曲线、轴压力-应变关系曲线、轴压承载力等进行分析,揭示了有无覆板、浆料类型、墙板厚度、钢丝网层数等参数的影响规律。试验结果表明:有无覆板、浆料类型、浆料厚度对组合墙板的轴压性能有较大影响;钢丝网层数对墙板轴压性能没有明显影响。同时提出了填充轻质浆料的预制冷弯型钢组合墙板轴压承载力计算方法,并验证了其准确性。

With the development of green prefabricated rural building in decades,the traditional cold-formed steel(CFS)wall reveals some shortcomings,such as poor sound insulation,low bearing capacity and weak thermal insulation.In order to improve the performance of walls and the degree of assembly,a novel type of prefabricated light mortar-filled CFS composite walls was developed.A total of six composite walls were tested under axial loading.The failure modes,load-displacement relations,load-strain relations,bearing capacities were studied comprehensively.The parameters including sheathing,filling type,wall thickness,and the number of steel mesh layers were studied.The test results showed that the sheathing,filling type and the thickness of wall panel had great effect on the performance of composite wall panels under axial compression.The number of steel mesh layers appeared no obvious influence on the bearing capacity.Additionally,the calculation method of bearing capacity of the wall panels under axial compression was proposed,and its accuracy was verified by experimental data.