论文部分内容阅读
提出用端部加强方法制作组合热轧角钢防屈曲支撑的钢芯。设计、制作并测试了7个试件,其中热轧角钢防屈曲支撑试件4个、对比热轧钢板试件3个。端部加强型角钢钢芯采用了两种截面(错十字形和T形)、两种组合方式(工作段焊接与非焊接),用端部焊接加强板的方法形成弱化工作段,主要优点是加工方便、降低造价。热轧钢板试件采用钢板焊接并切削成型。试验中设计改进了加载装置,采用静力反复加载方法加载。研究了包括轴向荷载-轴向变形滞回曲线、累计塑性变形、极限变形能力、刚度退化以及等效阻尼比等抗震性能。研究表明,用这种成型方法制作的组合热轧角钢防屈曲支撑构造简单,耗能能力、延性等抗震性能可满足建筑结构消能减震设计的需求。
It is proposed that the steel core with anti-buckling support for hot-rolled angle steel be produced by the method of end reinforcement. Seven specimens were designed, fabricated and tested, including 4 hot-rolled angle buckling-supported specimens and 3 hot-rolled steel specimens. End reinforced angle steel core with two cross-section (the wrong cross and T-shaped), two combinations (work section welding and non-welding), with the end of the plate welding method to strengthen the weakening of the work section, the main advantage is Easy processing, reduce costs. Hot-rolled steel plate specimens welded and cut forming. In the experiment, the design of loading device was improved and loaded by static repeated loading method. The seismic performance including axial load-axial deformation hysteresis curve, cumulative plastic deformation, ultimate deformation capacity, stiffness degradation and equivalent damping ratio were studied. The results show that the anti-buckling brace made by this method has the advantages of simple structure, energy-dissipating ability and ductility and so on. The anti-buckling support can meet the demand of energy dissipation and damping design of building structure.