板柱节点考虑弯剪相关性的受冲切承载力计算方法  

Calculation method for punching capacity of slab-column connections considering bending shear correlation

作　　者：郑文忠[1,2] 吕盛先 郑博文 王英 ZHENG Wenzhong;LYU Shengxian;ZHENG Bowen;WANG Ying(Key Lab of Structures Dynamic Behavior and Control(Harbin Institute of Technology),Ministry of Education,Harbin 150090,China;Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters(Harbin Institute of Technology),Ministry of Industry and Information Technology,Harbin 150090,China)

机构地区：[1]结构工程灾变与控制教育部重点实验室(哈尔滨工业大学),哈尔滨150090 [2]土木工程智能防灾减灾工业和信息化部重点实验室(哈尔滨工业大学),哈尔滨150090

出　　处：《哈尔滨工业大学学报》2025年第1期65-76,共12页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(52078162)。

摘　　要：对于同时受到竖向荷载和不平衡弯矩作用的板柱节点,目前已有方法大多将不平衡弯矩等效为竖向荷载,从而给出其受冲切承载力计算方法。但该方法所涉及的不平衡弯矩比例系数的计算还存在较大争议,且没有考虑竖向荷载与不平衡弯矩耦合的影响。因此,本文首先通过推导给出仅有竖向荷载作用的板柱节点受冲切承载力计算公式和仅有不平衡弯矩作用的板柱节点受弯承载力计算公式,并与试验结果进行对比,验证了所提公式的合理性。然后基于板柱节点在竖向荷载和不平衡弯矩共同作用下的试验结果,拟合得到板柱节点考虑弯剪相关性的受冲切承载力计算公式。最后对所提计算方法与不同规范计算方法进行对比,结果表明本文计算方法能够更加准确地预测板柱节点受冲切承载力。For slab-column connections subjected to vertical loads and unbalanced bending moments,the unbalanced bending moment is typically equated to vertical loads in most existing methods for calculating their punching capacity.However,there is significant controversy regarding the calculation of the unbalanced bending moment ratio coefficient in existing methods,and the coupling effect between vertical loads and unbalanced bending moments has not been adequately considered.Therefore,this paper first proposes a new equation for calculating the punching capacity of slab-column connections under vertical loads only and validates it through comparison with experimental results.Additionally,a novel equation for calculating the flexural capacity of slabs under unbalanced bending moments is proposed.Based on experimental results and considering the bending-shear correlation,an equation for calculating the punching capacity of slab-column connections under the combined action of vertical loads and unbalanced bending moments is then derived.Finally,the proposed method is compared with various design code methods.The results indicate that the proposed method can more accurately predict the punching capacity of slab-column connections.

关 键 词：板柱节点 竖向荷载 不平衡弯矩 受冲切承载力 计算方法 

分 类 号：TU375[建筑科学—结构工程]