(1 中国建筑设计研究院有限公司， 北京 100044；2 北京工业大学工程抗震与结构诊治北京市重点实验室， 北京 100124)

［摘要］无梁楼盖结构体系的板柱节点易发生脆性冲剪破坏，进而导致整体结构的连续倒塌。近年来我国地下室无梁楼盖系统连续倒塌事故多次发生，引发了工程界的广泛关注。针对上述情况，汇总了无梁楼盖结构的典型事故，分析存在的共性问题。总结了无梁楼盖板柱节点研究的主要成果，包括节点性能试验、节点加强措施和子结构抗连续倒塌试验以及规范抗剪强度计算方法。讨论了实际工程设计中常见的问题，并提出了建议，可为相关科学研究和工程实践提供参考。

［关键词］地下室无梁楼盖； 连续倒塌； 事故调查； 研究综述； 设计方法

中图分类号：TU375-2文献标识码：A文章编号：1002-848X(2020)14-0001-09

Design thinking on anti-collapse of beamless floor of the basement

SUN Hailin1, YANG Youzhe2, LI Yi2, SUN Qingtang1

(1 China Architecture Design & Research Group, Beijing 100044, China; 2 Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China)

Abstract:The slab-column joints of the beamless floor structure system are prone to brittle punch-shear failure, which leads to the continuous collapse of the overall structure. In recent years, the continuous collapse of the beamless floor system in the basement of our country has occurred many times, which causes widespread concern in the engineering community. In view of the above situation, the typical accidents of the beamless floor structure were summarized, and the common problems were analyzed. The main results of the research on slab-column joints of the beamless floor were summarized, including performance test of joint, strengthening measures of joint and anti-continuous collapse test of sub-structure, and shear strength calculation method in the code. The common problems in actual engineering design were discussed, and suggestions were put forward, which can provide reference for related scientific research and engineering practice.

Keywords:beamless floor of the basement； continuous collapse； incident investigation； literature review； design method

作者简介：孙海林，博士，教授级高级工程师，副总工程师，Email:sunhailin@cadg.cn。