(华诚博远工程技术集团有限公司， 北京 100052)

［摘要］近年来，采用无梁楼盖体系的地下室顶板破坏事故时有发生。结合工程需要，将中美混凝土规范无梁楼盖抗冲切内容进行对比，分析异同优劣。结果表明：对于梁抗剪计算，美混规考虑了混凝土斜裂缝开裂后增加的剪力转移到抗剪箍筋这一因素，更加合理；对于板抗冲切计算，不设置抗冲切钢筋时，美混规抗冲切承载力略高于混规。之后结合工程案例给出设计建议。 

［关键词］无梁楼盖；板柱体系；冲切；中美规范

中图分类号：TU318 文献标识码：A文章编号：1002-848X(2021)17-0050-04

Comparison of punching resistance design of beamless floors between Chinese and U.S. codes and analysis of beamless floor accidents 

WANG  Lijun 

(Huachengboyuan Engineering Technology Group, Beijing 100052， China) 

Abstract: In recent years, the roof damage accidents of basements using beamless floor systems have occurred from time to time. In accordance with the needs of the project, the content of punching resistance of the beamless floor in the Chinese and U.S. concrete structure design codes was compared, and the similarities and differences were analyzed. The results show that for the calculation of beam shear resistance, the U.S. concrete structure design code takes into account the factor that the increased shear force after the concrete diagonal crack cracks is transferred to the shear stirrup, which is more reasonable; for the calculation of the slab punching resistance, when the punching resistant reinforcement is not set, the punching resistance bearing capacity of U.S. concrete structure design code is slightly higher than that of Chinese concrete structure design code. After that, design suggestions were given based on the engineering case. 

Keywords:beamless floor； slab-column system； punching; Chinese and U.S. code

作者简介：王立军，全国工程勘察设计大师，博士，教授级高级工程师，Email: 13901212966@sina.cn。