【摘要】 根据两组钢桁架连梁在反复荷载作用下的试验结果,对该新型连梁的破坏形态、滞回性能、耗能能力和累积损伤模型等进行了分析,探讨了钢桁架连梁累积损伤的发展过程和损伤发育规律,通过损伤模型计算的破损结果与试件实际破坏特征对比,讨论了跨高比对连梁损伤发展的影响。结果表明:有交叉腹杆的连梁,跨高比越大,其耗能能力、承载力以及变形均较大,但其损伤发展相对较快。更多还原

【Abstract】 In this paper,failure pattern,hysteretic behavior,energy dissipation and seismic damage models were analyzed based on experimental results of two groups of steel truss coupling beams under monotonic horizontal and low cyclic loadings.And then development laws of cumulative damage were investigated.At last by comparing the calculated damage indexes with the observed real damage to the steel truss coupling beam,influences of span-height ratio on damage development of steel truss coupling beam were studied.The results show that the increase of span-height ratio makes steel truss coupling beam behave better in energy dissipation and bearing capacity but develop damage faster.更多还原