设计参数对高层装配式钢结构建筑抗倒塌能力的影响

以某高层装配式钢结构建筑为研究对象，研究设计参数对其抗倒塌能力的影响，通过ABAQUS有限元软件，对装配式混凝土平面框架的低周反复加载试验进行模拟。结果表明，增大框架柱轴压比可提高结构承载力，在荷载峰值达到后会有较快的降低，显著降低了延性。在荷载低周反复作用下，结构延性、承载力、耗能等随着梁柱线刚度比的降低，抗震指标全部呈现增加趋势。随着梁柱线刚度比的增大，层间位移角沿楼层分布均匀性变得越来越差；由于受到荷载作用低周反复后，会大大增加混凝土的强度，并降低耗能和延性指标，同时结构承载力则略微增大。增大轴压比后，如果保持相同的地震动强度，则将会大大提高结构性能极限状态的可能性，而如果结构的轴压比较大，很可能会出现对地震响应性能水平产生破坏等问题。

Influence of Design Parameters on Anti-collapse Capability of High-Rise Fabricated Steel Structure Buildings

In this study, the influence of design parameters on the anti-collapse capability of a high-rise prefabricated steel structure building was studied. By using ABAQUS finite element software, a low-cycle repeated loading test of the prefabricated concrete plane frame was simulated. The results showed that increasing the axial compression ratio of the frame column can improve the bearing capacity of the structure, and the bearing will decrease rapidly after the peak load is reached. Under cyclic loading, the ductility, bearing capacity, and energy consumption of the structure increased with a decrease in the beam-to-column linear stiffness ratio. With increasing beam-to-column linear stiffness ratio, the distribution uniformity of the story drift ratio worsened; moreover, because of the low-cycle repeated load, the concrete strength will greatly increase, and the energy consumption and ductility will reduce, while the structure bearing capacity will slightly increase. Increasing the axial compression ratio will greatly increase the possibility of the limit state of the structure performance under the same ground motion. A large axial compression ratio of the structure is likely to damage the seismic response performance.