摘要
以整体结构在风荷载下侧移超过规范容许值和连接件发生破坏作为判断标准,对蒙皮(墙板)的抗剪性能进行了研究。首先以一单层冷成型钢排架为研究对象,考查其在面内荷载作用下可能出现的破坏模式。在此基础上以5层冷成型钢框架结构为例,分析其在控制荷载(风荷载)作用下的受力情况。通过比较传统柱间支撑和蒙皮这两种构造的框架整体侧移刚度,发现在螺钉连接方式和间距合理的前提下,蒙皮完全可以取代支撑。通过改变螺钉的间距和螺钉的连接方式(每波连接、隔波连接)以及板的厚度,对该5层框架的受力和侧移进行参数分析,给出了在不同板厚条件下获得理想蒙皮抗剪效果的连接方式:对于0.6mm板,螺钉与框架柱只能采用每波连接方式,并且跨度方向螺钉间距不能大于250mm;对于1.0mm板,跨度方向螺钉间距小于等于500mm,而且可以采用每波或隔波连接方式。建议在实际工程中螺钉应尽量采用每波连接方式。
The effects of skin diaphragm in panels, such as floor, wall and roof, have to be considered thoroughly. Based on the barrier, i.e., whether the fastener is failure or the lateral displacements under wind is exceed the code, the shear resistance of diaphragm is analyzed by finite element method. A single-storey cold-formed steel bent is selected to reveal the failure mode under in-plane load. Then a five-storey cold-formed steel framework is designed to analysis its mechanical behavior under wind load. By comparing lateral displacements of framework under two different construction measures, i.e., traditional inter-column brace or skin diaphragm, the conclusion is drawn that traditional brace can be substituted by skin diaphragm, if the distance and connection way (every corrugation and alternate corrugation) of screw is reasonable. By changing distance, connection way of screw and thickness of panels, stresses and lateral displacements of the five-storey cold-formed steel framework are investigated. Furthermore, proper connection ways with different thickness of panels are presented, by which the ideal skin diaphragm effects can be gained, i.e. for the panel with 0.6 mm in thickness,every corrugation connection within 250 mm separation of the screws in span is only available; while for the panel with 1.0 mm in thickness,either every corrugation or alternate corrugation connections within 500 mm separations of the screws are available. In practice engineering, the connection with every corrugation is better than that with alternate corrugation.
出处
《应用力学学报》
CAS
CSCD
北大核心
2009年第3期594-599,共6页
Chinese Journal of Applied Mechanics
基金
江苏省自然科学基金(BK2006103)
关键词
冷成型钢
蒙皮效应
数值模拟
连接方式
cold-form steel, diaphragm action, numerical simulation, connection way.
