同济大学学报（自然科学版）2024，Vol.52Issue(1)：59-67,9.DOI:10.11908/j.issn.0253-374x.22243
不同界面下梁端直剪型锚栓钢板剪切承载力试验研究
Experimental Study on Shear Capacities of Reinforced Concrete Beams Strengthened by Direct-shear-bolted Side-plates near Beam Ends Under Different Interfacial Conditions
全学友 1罗晨 1刘佳迪 2黄辉辉3
作者信息
- 1. 重庆大学 土木工程学院,重庆 400045||重庆大学 山地城镇建设与新技术教育部重点实验室,重庆 400045
- 2. 四川省建筑科学研究院有限公司,四川 成都 610000
- 3. 广东省建筑设计研究院有限公司,广东 广州 510010
- 折叠
摘要
Abstract
This paper presents a test program of shear capacities of reinforced concrete beam strengthened by direct-shear-bolted side-plates near beam ends.The test program consists of one control shear span and five shear spans strengthened in shear.Test parameters involve interfacial conditions and depth of side-plates.Test results show that all kinds of adhesion interfaces are eventually de-bonded in loading process,without affecting shear capacities whether the adhesion is weak or strong.Shear capacities are effectively improved by increasing the plate depth and the number of corresponding direct-shear bolts.There are two mechanisms in the shear strengthening of direct-shear-bolted side-plates system,i.e.,the constraint mechanism and the composite action mechanism.The constraint mechanism takes effect by constraining the development of diagonal crack width,and in the composite action mechanism the bolted side-plates directly transfer part of the shear force to the support.Steel plates with lower depth are mainly in the constraint mechanism,while steel plates with higher depth work both in the constraint mechanism and composite action mechanism.关键词
结构加固/锚栓钢板加固/直剪型锚栓钢板加固/界面条件/约束机制/组合受力机制Key words
structural strengthening/strengthening with bolted steel plates/strengthening with direct-shear-bolted side-plates/interfacial conditions/constraint mechanism/composite action mechanism分类
建筑与水利引用本文复制引用
全学友,罗晨,刘佳迪,黄辉辉..不同界面下梁端直剪型锚栓钢板剪切承载力试验研究[J].同济大学学报（自然科学版）,2024,52(1):59-67,9.
