中小学框架结构教学楼抗连续性倒塌分析

Analysis of Resist Progressive Collapse for RC Frame Structure of Primary and Secondary School Buildings

汶川地震和玉树地震造成大量建筑物倒塌和重大人员伤亡,结构的抗连续倒塌分析再次引起工程技术人员的重视。为了研究中小学教学楼在常规设计条件下是否具有抗连续倒塌能力,本文按照现行规范设计了两栋典型的抗震设防烈度分别为7度和8度的中小学框架结构三维模型,依照有关规范中提出的抗连续倒塌的基本规定,采用弹性静力分析方法对拆除柱后剩余构件能否满足承载力要求进行判断。最后还分析了楼板对抗连续倒塌的影响及梁的悬链线机制。结果表明,按现行规范设计的中小学教学楼部分构件仍不能完全保证具有抗连续倒塌能力。

Wenehuan earthquake and Yushu earthquake caused a large number of buildings collapsed and the heavy casualties, the anti- progressive collapse analysis of the academic community structure has once again aroused the attention. In order to study the anti- progressive collapse capabilities of primary and secondary school buildings in the conventional design conditions, the two typical frame structures of primary and secondary school buildings in seismic intensity of 7 degrees and 8 degree are designed according to the existing code. Accordance with related specifications proposed the basic provisions against progressive collapse, the use of static analysis methods for the removal of the linear post-column capacity can meet the requirements of the remaining components to judge. Finally, progressive collapse analysis of the impact against the floor and beam catenary mechanism is carried out. The results show that the current specification does not guarantee continuous primary and secondary school buildings with anti-collapse capabilities.