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钢筋混凝土板柱节点受冲切承载力计算方法分析*
史庆轩1,2,3,蒋明月2
摘 要

(1 西部绿色建筑国家重点实验室/西安建筑科技大学, 西安 710055;2 西安建筑科技大学土木工程学院, 西安 710055;3 西安建筑科技大学结构工程与抗震教育部重点实验室, 西安 710055)

[摘要]钢筋混凝土板柱节点受冲切承载力是目前板柱结构存在的突出问题,对确保此类结构的安全性至关重要。在国内外大量研究的基础上,回顾了国内外学者提出的板柱节点受冲切承载力模型理论的发展过程,重点阐述了桁架模型、临界剪切裂缝理论、塑性理论、切向应变理论和临界截面应变理论等。针对板柱节点受冲切承载力的几种典型计算方法,深入分析了混凝土强度、板有效高度、配筋率、纵筋屈服强度和柱边长等参数对板柱节点受冲切承载力的影响,并利用试验数据分析了各种计算方法的适用性及局限性,提出对板柱节点受冲切承载力计算方法的认识并阐述其发展方向。

[关键词]板柱节点; 受冲切承载力; 模型理论; 无梁楼盖

中图分类号:TU375文献标识码:A文章编号:1002-848X(2021)02-0001-08

 

Analysis on calculation methods of punching shear capacity of reinforced concrete slab-column connections

SHI Qingxuan1,2,3, JIANG Mingyue2

(1 State Key Laboratory of Green Building in Western China, Xi′an University of Architecture & Technology,  Xi′an 710055, China; 2 School of Civil Engineering, Xi′an University of Architecture & Technology, Xi′an 710055, China;  3 Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education(XAUAT), Xi′an 710055, China)

Abstract:The punching shear capacity of reinforced concrete(RC)slab-column connections is a prominent problem in the current slab-column structure, which is critical to ensuring the safety of such structures. Based on a large number of researches at home and abroad, the development of punching shear capacity model theory of slab-column connections proposed by domestic and international scholars was reviewed. It focused on the truss model, critical shear crack theory, the theory of plasticity, tangential strain theory and strain-based strength theory. In view of several typical calculation methods for the punching shear capacity of the paramnters such as  slab-column connections, the effects of the parameters such as concrete strength, effective depth, reinforcement ratio, yield strength of flexural reinforcement and the length of the column on the punching shear capacity of the slab-column connections were analyzed in depth,and the applicability and limitations of various calculation methods were analyzed by using experimental data. The understanding of the calculation method of punching shear capacity of slab-column connections was proposed and future development direction was expounded.

Keywords:slab-column connection; punching shear capacity; model theory; griderless floor

 

*国家自然科学基金项目(51878540)。

 

作者简介:史庆轩,博士,教授,博士生导师,Email:shiqx@xauat.edu.cn;通信作者:蒋明月,博士研究生,Email:jiangmingyue_ad@163.com。

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