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目的研究纤维水泥压力复合外墙板在低周往复荷载下的抗剪力学性能,为其在实际工程中应用提供合理的设计依据.方法通过对3面足尺的FCP复合外墙板进行低周往复试验研究,得到各试件的荷载-转角曲线,承载力骨架曲线,极限承载力,转角延性系数,能量耗散系数,抗剪刚度.结果 FCP复合外墙板试件的破坏模式主要表现为:FCP覆面板角部位置破坏,冷弯薄壁型钢龙骨与自攻螺钉连接失效,两侧边框龙骨节点位置冷弯型钢龙骨连接位置破坏.试件延性系数在1.98~6.56,能量耗散系数在0.56~0.71,并得到了试件在层间位移角达到1/300时,对应的抗剪刚度.结论 FCP复合墙板满足正常使用状态下承载力要求.整个加载过程中,墙板试件没有从主体结构脱落.钢龙骨间距对试件侧向抗剪承载力影响不大,窗洞口削弱了试件的侧向抗剪承载力.
Aim To study the shear-resistant mechanical properties of fiber cement composite wall panels under low cyclic loading, and to provide a reasonable design basis for its application in practical engineering.METHODS The FCP composite exterior wall panels The results of reciprocating tests show that the failure modes of FCP composite exterior wall specimens are mainly as follows: load-rotation curve, bearing capacity skeleton curve, ultimate bearing capacity, angular ductility coefficient, energy dissipation coefficient and shear stiffness.Results: : The corner position of FCP cladding panel is damaged, the connection between cold-formed thin-wall steel keel and self-tapping screw fails, and the connection position of cold-formed steel keel at both sides of the keel node is damaged.The ductility coefficient of specimen is between 1.98 and 6.56, the energy dissipation coefficient is 0.56 ~ 0.71, and the corresponding shear stiffness was obtained when the displacement angle of the specimen reached 1/300. CONCLUSION FCP composite wall panels meet the requirements of bearing capacity under normal use conditions. During the whole loading process, The steel keel spacing had little effect on the lateral shear strength of the specimen, and the window opening weakened the lateral shear strength of the specimen.