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按1∶2缩尺模型,设计了一榀用于多层住宅的新型人字支撑复合结构模型试件。根据理论计算结果,确定了该试件在竖向荷载作用下的试验加载方案。通过试验,分析了复合结构在正常使用阶段和承载力极限状态时梁柱及支撑的各控制截面应力、裂缝、变形和破坏形态。结果表明,当荷载达到按“恒载+活荷载”计算的住宅竖向荷载标准值、设计值时,梁的最大裂缝宽度和挠度均远小于规范限值,直至破坏,支撑和柱截面的应力均较小。将计算值和试验结果比较,梁的裂缝宽度、挠度和支撑轴力均符合较好。
According to the 1: 2 scale model, a new model specimen of multi-storey herringbone supporting composite structure was designed. According to the theoretical calculation results, the test loading scheme of the specimen under vertical load was determined. Through experiments, the stress, crack, deformation and failure modes of the control cross-sections of the beam-column and the support during the normal use stage and the ultimate bearing capacity are analyzed. The results show that the maximum crack width and deflection of the beam are far less than the standard limits until the load reaches the standard value and the design value of the vertical load of the house calculated by “dead load + live load ” until the failure, support and column cross section The stress is small. Comparing the calculated value with the experimental result, the crack width, deflection and supporting axial force of the beam are in good agreement.