中文摘要：

采用拟静力试验方法进行了钢筋混凝土空间框架的连续倒塌试验。试验模型按非抗震要求设计,用机械千斤顶替换底层长边中柱以模拟其初始失效,用电液伺服千斤顶作用在模型顶层以模拟上部结构重力荷载。对底层长边中柱进行分级卸载,模拟其初始失效后钢筋混凝土框架结构连续倒塌全过程,观测并分析了抗力-位移曲线及结构塑性铰出现位置、顺序,结构受力机制的转换过程。试验结果表明,纵向框架抗倒塌机制包括梁机制、复合机制和悬链线机制,而横向框架抗倒塌机制仅包括梁机制。

英文摘要：

The pseudostatic experiment was finished to investigate progressive collapse performance of a rein forced concrete spatial frame structure, which was designed without seismic demand. The middleside colunm of the bottom floor was replaced by mechanical jacks to simulate its failure. Based on the experimental results, resistance displacement curve, plastic hinge development history and load transferring mechanism of the model frame were ana lyzed. It is concluded that beam mechanism, compound mechanism and catenary mechanism all work to resist pro gressive collapse as for the longitudinal frame, while only beam mechanism plays a part as for the transverse frame.