腹板开孔形状影响耗能支撑滞回性能试验研究

腹板开孔耗能支撑有效地避免了传统中心支撑斜杆的失稳破坏,具有较强的耗能能力.为研究腹板开孔形状对支撑滞回性能的影响,对腹板开菱形孔、椭圆孔及长圆孔耗能支撑试件进行了低周往复加载试验,分析了试件在循环荷载作用下的破坏机理、滞回性能、承载能力、刚度退化及耗能能力.试验结果表明:耗能支撑试件滞回曲线饱满,耗能性能优越.耗能支...

Experimental research on hysteretic behavior of energy-dissipating brace influenced by the shape of web openings

Energy-dissipating brace can effectively avoid the instability failure of traditional center brace and it has good hysteretic behavior.In order to study the hysteretic behavior of the brace influenced by shape of web openings,the low cycle loading tests were carried out on the specimens with the web open diamond opening,elliptical opening and slotted opening.The failure modes,hysteretic performance,load bearing capacity,stiffness degradation and energy dissipation capacity of specimens under cyclic loading were analyzed.The test results show that the hysteretic curve of braces is full and energy dissipation capacity of brace is excellent.The energy dissipation brace can dissipate energy through the perforated webs.In the whole loading process,the I-beam remains elastic,and theenergy dissipation web damage leads to the failure of the brace.Under the cyclic loading of the same level,the strength can be kept basically unchanged.The diamond opening web specimen has higher bearing capacity and stiffness but its deformation capacity is weak.The bearing capacity of the elliptical opening web specimen is similar to the slotted opening web specimen.