冷弯薄壁型钢与结构用OSB板自攻螺钉连接性能试验研究

发布时间：2019-01-09 07:06

【摘要】：龙骨式复合墙体是冷弯薄壁型钢龙骨体系结构的主要抗侧力构件,其抗震性能与覆面板和龙骨骨架间自攻螺钉连接的性能密切相关。通过对受单调和低周往复受剪荷载的冷弯薄壁型钢龙骨与结构用OSB板自攻螺钉连接受力性能的试验研究,分析了加载速率、面板布置方向、螺钉端距以及龙骨壁厚等因素对其抗震性能的影响。研究结果表明:试验加载速率和OSB板布置方向对其受剪性能均无明显影响;随着螺钉端距在试验钉距范围内增大,荷载及变形能力均有大幅提高;随着龙骨壁厚由0.8 mm增大至1.0 mm,峰值荷载提高了约10%,而变形能力则无明显变化规律。最后,在试验结果基础上,采用改进的"Foschi"指数型骨架曲线和定点指向型滞回规则建立了钢龙骨与结构用OSB板自攻螺钉连接的恢复力模型,为龙骨式复合墙体及房屋整体的抗震性能数值模拟研究提供了基本参数。
[Abstract]:The keel composite wall is the main lateral force resistant member of cold-formed thin-walled steel keel structure. Its seismic performance is closely related to the performance of self-tapping screw connection between the overlay panel and the keel frame. Based on the experimental study on the mechanical behavior of cold-formed thin-walled steel keels subjected to monotone and low-cycle reciprocating shear loads with OSB plate tapping screws, the loading rate and the direction of panel arrangement are analyzed. The effect of screw end distance and keel wall thickness on seismic performance. The results show that the loading rate and the direction of the OSB plate arrangement have no obvious influence on the shear performance, and the load and deformation capacity increase greatly with the increase of the screw end distance in the range of the test nail spacing. With the increase of the wall thickness of the keel from 0. 8 mm to 1. 0 mm, the peak load increases about 10%, but the deformation capacity does not change obviously. Finally, based on the experimental results, the restoring force model of the connection between steel keel and self-tapping screw with OSB plate is established by using the improved "Foschi" exponential skeleton curve and the fixed point pointing hysteretic rule. It provides the basic parameters for the numerical simulation of seismic performance of the composite wall and the whole building.
【作者单位】：同济大学建筑工程系;上海钢之杰(集团)公司;
【基金】：国家十二五科技支撑计划(2012BAJ13B02)
【分类号】：TU392;TU317

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