基于等效斜向腹筋桁架-拱模型的小剪跨比剪力墙受剪承载力计算方法  

Calculation of Shear Capacity of Shear Walls with Small Shear-Span Ratio Based on Equivalent Diagonal Web Truss-Arch Model

作　　者：金辰华 吴畅[3] 潘钻峰[4] 孟少平[3] JIN Chenhua;WU Chang;PAN Zuanfeng;MENG Shaoping(School of Architectural Engineering,Jinling Institute of Technology,Nanjing 211169,China;Jiangsu Research Institute of Building Science Co.,Ltd.,Nanjing 210008,China;School of Civil Engineering,Southeast University,Nanjing 210096,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]金陵科技学院建筑工程学院,南京211169 [2]江苏省建筑科学研究院有限公司,南京210008 [3]东南大学土木工程学院,南京210096 [4]同济大学土木工程学院,上海200092

出　　处：《工业建筑》2023年第9期111-118,共8页Industrial Construction

基　　金：江苏省高等学校自然科学研究项目(21KJB560005);江苏省博士后科研资助计划(2021K519C);国家自然科学基金青年基金项目(52108119);江苏省自然科学基金青年基金资助项目(BK20200376);中央高校基本科研业务费专项资金(2242023k30059)。

摘　　要：基于等效斜向腹筋桁架-拱模型,考虑不同破坏模式和变形协调条件,提出了一种计算小剪跨比剪力墙受剪承载力的计算方法。该方法通过单位宽度的钢筋强度的等效原理在桁架作用中同时考虑了腹板水平钢筋和竖向钢筋对受剪承载力的作用,同时提出混凝土受压区高度的经验计算式,用以确定斜压杆的截面高度。在收集整理了359片小剪跨比剪力墙的试验数据的基础上,采用提出的方法对构件的受剪承载力进行计算,并与中、美、欧、日的四种相关规范的计算结果进行比较。结果表明:除日本AIJ规范外,其余规范对小剪跨比剪力墙受剪承载力的计算均偏于保守,而AIJ规范过高地估计了拱杆的高度,使其计算结果偏不安全;而提出的建议式可以较为准确地计算小剪跨比剪力墙的受剪承载力。Based on the equivalent diagonal web truss-arch model and considering different failure modes and deformation coordination conditions,a method for calculating the shear capacity of small shear-span ratio shear walls was proposed.The effects of both horizontal and vertical reinforcements in the web on the shear capacity of the member through the strain equivalence principle in the truss action were considered in the method,and an empirical formula to calculate the height of the compression zone for determining the section height of the concrete diagonal compression strut were also proposed.The test data of 359 small shear-span ratio shear walls were collected,and their shear capacity was calculated by using the method proposed in the paper,and compared with the Chinese,American,European and Japanese codes.The results showed that except for the Japanese AIJ code,the calculation of shear capacity of small shear-span ratio shear walls were conservative,while the AIJ code overestimated the height of the arch bar,which made its calculation results unsafe;while the proposed formula could calculate the shear bearing capacity of small shear-span ratio shear walls more accurately.

关 键 词：钢筋混凝土剪力墙 等效斜向腹筋桁架-拱模型 破坏模式 变形协调 受剪承载力 

分 类 号：TU398.2[建筑科学—结构工程]