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首页> 外文期刊>Magazine of Concrete Research >Experiments on the collapse response of flat slab structures subjected to column loss
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Experiments on the collapse response of flat slab structures subjected to column loss

机译：平板结构受柱损失的倒塌响应试验

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Flat slab structures are prone to progressive collapse due to their relatively heavy self-weight and susceptibility to punching shear failure. In this study, three one-third scaled slab-column sub-assemblages were statically and dynamically tested to examine the collapse behaviour of such structures when either an edge or a penultimate column is removed. In the static tests, the development of an alternative load path bridging over the removed column was investigated with two specimens that were loaded to failure by a load-control procedure using concrete weights. In the dynamic test, a specimen that had been loaded by concrete weight up to 80% of the yield-line capacity was subjected to a sudden column removal, which was simulated by a quick-release mechanism. Based on the experimental observations, the potential failure modes of flat slab structures, the development of tensile membrane action as an alternative load path, and the dynamic effects resulting from sudden column removal are discussed.
机译：平板结构由于其相对较重的自重和对冲剪破坏的敏感性而易于逐渐塌陷。在这项研究中，静态和动态地测试了三个三分之一比例的平板-柱子组合件，以检查当移除边缘或倒数第二根柱子时此类结构的倒塌行为。在静态测试中，研究了使用两个试样通过混凝土控制的荷载控制程序将其加载至破坏状态，从而研究了跨接在已拆除柱上的替代荷载路径的发展。在动态测试中，对已经承受混凝土重量达屈服线能力的80％的试样进行突然的柱移除，这是通过快速释放机制模拟的。在实验观察的基础上，讨论了平板结构的潜​​在破坏模式，作为替代荷载路径的拉伸膜作用的发展以及突然拆除立柱所产生的动力效应。

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