摘要
对4.8 m×2.8 m轻型钢木混合楼盖平行及垂直于搁栅方向分别进行了水平往复加载拟静力试验研究,得到了其变形特征、破坏模式、强度、平面内刚度、耗能以及延性。结果显示平行及垂直于搁栅加载时,楼盖变形都以剪切变形为主,主要破坏模式都是两加载点以外的面板钉剪断。垂直于搁栅相比平行于搁栅加载具有更高的强度、平面内刚度、更好的耗能性能和延性。另外将这些参数与FEMA273、ASCE 41-06及NSZEE规范建议值作了比较。结果表明楼盖平面内刚度大大低于FEMA273建议值,高于ASCE41-06及NSZEE,但与ASCE41-06更接近。楼盖强度及延性均高于这些规范建议值。
Horizontal cyclic pseudo-static tests were conducted, respectively in parallel direction and that perpendicular to the joist direction of a light wood-steel hybrid diaphragm of 4.8 m × 2.8 m, its deformation feature, failure mode, strength, in-plane stiffness, energy dissipation and ductility were obtained. The results showed that when the diaphragm is loaded in the directions parallel or perpendicular to the joist, the shear deformation occupies the majority of the total deformation and the panel nails outside the two loading points c11pped is the main failure mode; moreover, when the diaphragm is loaded in the direction perpendicular to the joist, it possesses higher strength and in-plane stiffness, better energy dissipation performance and ductility; in addition, these parameters are compared with the suggested values of codes FEMA273, ASCE 41-06 and NSZEE, the diaphragm＇s in-plane stiffness is significantly lower than the the suggested value of FEMA273 but higher than those of ASCE 41-06 and NSZEE, and more close to that of ASCE 41-06; furthermore, its strength and ductility both exceed the recommended values of these codes.
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第18期90-95,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51378382)
关键词
轻型钢木混合楼盖
平面内刚度
水平荷载分配
剪切变形
light wood-steel hybrid diaphragm
in-plane stiffness
horizontal load distribution
shear deformation
