摘要
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.
In order to study the mechanical properties of fiber cement pressure composite exterior wall board（ referred to as FCP composite exterior wall board） under cyclic loading,full scale model test was carried out for 3 pieces of FCP composite exterior wall board under cyclic horizontal load. The size of specimen was 2 800 mm × 2 400 mm,and the stud spacing and windowhole were set as the main parameters in this research. From the test,load-rotation curves,skeleton curves,bearing capacity,ductility factor of rotation,energy dissipation coefficient and shearing rigidity were got. The test results showed that： the failure mode of FCP composite exterior wall board mainly involved the destruction of FCP board at the corner position,the failure of connectionbetween cold-formed steel stud and self-tapping screws,and the local damage of steel studs at the position of the connections on both sides. The ductility coefficient of the specimen was 1. 98 ~6. 56,the energy dissipation coefficient was 0. 56 ~ 0. 71,and the shear rigidity of the specimen according to the story drift of 1/300 was also obtained. Finally,the influence factors analysis was carried out,and the results showed that： steel stud spacing has little effect on the lateral shear capacity of the specimen,but the windowopening weakened the lateral shear capacity of the specimen.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2017年第6期994-1003,共10页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51408373)
国家重点研发技术课题(2016YFC0701402)
关键词
复合墙板
龙骨
循环荷载
抗剪性能
抗震性能
composite wall board
studs
cyclic loading
shear resistance
seismic performance
