Study on shear performance of bolted joints reinforced with welds

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), May.2025, Vol.48 No.5: 713-720

DOI: 10.3969/j.issn.1003-5060.2025.05.021

Authors

LI Xiang $ ^{1} $, WANG Chenggang $ ^{1} $, SHEN Qihan $ ^{1,2} $, CHEN Anying $ ^{1,3} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei 230009, China; 3. Hefei University of Technology Gongda Engineering Inspection and Testing Co., Ltd., Hefei 230051, China)

Abstract and Keywords

Abstract: In order to further study the shear performance and failure mechanism of the bolted joints reinforced with plug-weld, side-weld and end-weld, a static tensile experimental study was carried out by testing eleven single type connection joint specimens and ten weld reinforced bolted joint specimens. The strengthening effect of various welds on the shear performance of the bolted joints was revealed by comparing their deformation and bearing capacities. The results showed that the failure mode of the side-weld reinforced bolted joint was the slipping of bolt rod, which had a good deformation capacity, and it belonged to the ductile failure. The failure mode of the end-weld reinforced bolted joint was the weld fracture, which had a high load bearing capacity, but it belonged to the brittle failure. The failure mode of the plug-weld reinforced bolted joint was the shear failure of the weld, and it belonged to brittle failure as well, while the square plug-weld reinforcement type had the largest utilization rate on the strengths of the two connection types. Therefore, suggestions for different reinforcement methods were given according to various strengthening requirements.

Keywords: weld reinforced bolted joint; shear performance; failure mechanism; bearing capacity; deformation capacity

作者信息

李翔 $ ^{1} $，王成刚 $ ^{1} $，沈奇罕 $ ^{1,2} $，陈安英 $ ^{1,3} $

（1. 合肥工业大学土木与水利工程学院，安徽合肥 230009；2. 土木工程结构与材料安徽省重点实验室，安徽合肥 230009；3. 合肥工大共达工程检测试验有限公司，安徽合肥 230051）

摘要和关键词

摘要: 为研究塞焊缝、侧焊缝、端焊缝3种焊缝补强型栓焊并用连接的受剪性能和破坏机理,文章对11个单一连接试件和10个焊缝补强型栓焊并用连接试件进行静力拉伸试验,通过对变形和承载性能的系统分析,明确不同焊接形式对螺栓连接受剪性能的补强效果。结果表明:侧焊缝补强型连接的破坏模式为栓杆滑移,有较好的变形能力,属延性破坏;端焊缝补强型连接的破坏模式为焊缝断裂,属脆性破坏,但承载性能高;塞焊缝补强型连接的破坏模式为塞焊缝被剪断,属脆性破坏,但方形塞焊缝对2种连接方式承载力利用率最大,因此根据不同加固要求给出了不同补强方式的建议。

关键词: 栓焊补强连接；受剪性能；破坏机理；承载性能；变形能力

Funding

安徽省住房和城乡建设科学技术计划资助项目（2021-YF33）；中央高校基本科研业务费专项资金资助项目（PA2022GDSK0062）

合肥工业大学学报(自然科学版)

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