轻型钢木混合楼盖水平荷载转移性能

发布时间：2018-07-24 12:38

【摘要】：通过水平集中荷载作用下一层两跨的钢木混合结构拟静力试验,研究轻型钢木混合楼盖弹性状态下平面内刚度及其对水平荷载的分配.为了量化楼盖平面内刚度对水平荷载分配的影响,定义了楼盖水平荷载转移能力系数β,探讨了楼盖平面内刚度与竖向抗侧力构件抗侧刚度比值α与β的关系,并根据α及β数值大小定义刚性楼盖.试验结果表明,轻型钢木混合楼盖在仅铺设SPF(云杉-松木-冷杉)规格材面板且竖向抗侧力构件仅为钢框架时,α在0.5~1.0之间,β为64.0%左右,楼盖已能较好地分配水平荷载;铺设水泥砂浆面层后,α增至3.0以上,β增至90.0%左右,结构有很强的空间协同作用,楼盖为刚性楼盖;当竖向钢框架间加上轻型木剪力墙后,α下降至1.0~2.0之间,β下降至78.0%左右,楼盖不再为刚性.
[Abstract]:Through the pseudo static test of a two span steel and wood mixed structure under horizontal concentrated load, the internal stiffness and the horizontal load distribution in the elastic state of the light steel wood mixed floor are studied. In order to quantify the influence of the floor stiffness on the horizontal load distribution, the horizontal load transfer capacity coefficient beta of the floor cover is defined, and the building is discussed. The relationship between the lateral stiffness ratio of the lateral stiffness and the vertical side force of the vertical side and the beta is defined, and the rigid floor is defined according to the alpha and beta values. The results show that the light steel wood mixed floor is only a steel frame with only SPF (spruce pine - FIR) panel and the vertical side resistance component is only steel frame, and the beta is about 64% between 0.5~1.0 and beta. The floor has been able to distribute the horizontal load well. After laying the cement mortar layer, the alpha increase to more than 3 and the beta to about 90%. The structure has a strong spatial synergy, the floor is a rigid floor. When the light wood shear wall is added between the vertical steel frames, the alpha drop to 1.0~2.0, the beta drop to about 78%, the floor is no longer rigid.
【作者单位】：同济大学土木工程学院;
【基金】：国家自然科学基金(51378382)
【分类号】：TU398.6

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