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通过对日本3·11大地震的震后现场调查,发现既有大跨空间结构梁柱连接节点的设计假定与真实情况不符。本次地震造成了这类建筑钢屋架与混凝土柱的连接部位普遍存在不同程度的损坏,在同类建筑中,作为灾民临时避难安置场所的500余座体育馆建筑,存在极大的安全隐患。为了探究这类损伤的原因,建立了某一体育馆的结构整体模型和连接部位的精细化弹塑性模型,并有针对性地提出了在连接处安装橡胶垫的加固方法,通过数值模拟计算和现场实测证明这是一种有效易行的节点连接加固方法。
After the post-earthquake field survey of the 3.11 earthquake in Japan, it was found that the design assumption of the existing connections of beam-column connections with large-span space structures did not accord with the real situation. The quake caused widespread damage to the joints between such steel truss girders and concrete columns. In the same category of buildings, over 500 gymnasiums as temporary refuge shelters for victims have a huge potential safety hazard. In order to explore the causes of such damage, the overall structural model of a gymnasium and the elaborate elasto-plastic model of the joint were established. The reinforcement method of installing the rubber mat at the connection was put forward in a targeted way. Through the numerical simulation and on-site Measured to prove that this is an effective and easy node connection reinforcement method.