装配式斜支撑钢框架承载力性能试验研究

新型工业化装配式斜支撑钢框架由钢桁架梁、钢立柱、钢斜支撑等构件所组成,该框架的桁架梁和斜支撑不同于传统框架,其传力路径、受力性能、破坏机理未经考证。通过对单榀单跨斜支撑钢框架进行静力试验及有限元模拟分析,旨在研究分析其水平荷载极限承载能力、变形特性、破坏机理及延性性能。试验及分析结果表明:装配式斜支撑钢框架承受水平荷载能力较强,斜支撑将水平荷载传递到桁架梁中部的耗能梁段,传力路径明确合理,破坏位置发生在桁架梁中部腹杆,且破坏时框架柱处于弹性工作状态,满足"强节点,弱构件"及"强柱弱梁"的建筑结构设计要求。

EXPERIMENT STUDIES ON BEARING CAPACITY OF PREFABRICATED STEEL FRAME WITH INCLINED BRACES

New Industrial prefabricated steel frame with diagonal brace is consists of steel truss beam,steel column and steel diagonal brace. The truss beam and diagonal brace are different from the traditional one,whose transferring way of force,mechanical behavior and failure mechanism are not examined. The static test and finite element analysis were done for the single span,single cross and single deck steel frame,aims to study the ultimate bearing capacity of horizontal load,deformation characteristics,failure mechanism and ductility performance. The results of test and analysis show that prefabricated brace frame has strong ability to withstand the horizontal load,the power transmission path is clear,and the damage is located at the mid web member of truss beam. While truss beam is damaged,the frame column and the nodes are in elastic state. The frame can meet the structural requirements of "strong jiont,weak components"and"strong column,weak beam"seismic design requirements.