Dynamic characteristics and simulation analysis of bolted joint of skew girder section of steel box girder bridge

doi:10.3969/j.issn.1000-1565.2026.04.003

Abstract

Abstract: The mechanical state of bolted joints in skewed girder sections of steel box girder bridges is complex, posing a key technical challenge in bridge design and construction. Based on the construction project of the prestressed concrete steel box girder bridge over the Beijing-Harbin expressway on the Qinhuangdao section of G102 national highway, simulation analysis and linear monitoring technologies were adopted to obtain the internal stress variation law of high-strength friction bolt groups in skewed girder sections. A mechanical model of high-strength friction bolt groups in skewed girder sections was established using ANSYS finite element software, and the deformation characteristics of skewed girder sections under different connection modes were analyzed, the optimal connection mode was obtained, and the dynamic characteristics of high-strength friction bolt groups were revealed. The dynamic load data show that the most unfavorable positions of the bolt group are the 5th and 15th columns. Under dynamic load, the maximum shear stress of the high-strength friction bolt group presents an approximately saddle-shaped- 引用格式:冯忠居,于明威,张聪,等.冲刷场地地震波形对大直径变截面单桩时程响应的影响［J］.河北大学学报(自然科学版),2026,46(4):337-348.引用格式:杨三强,李成旺,刘琦,等.钢箱梁桥斜交梁段栓接处动力学特性与仿真分析［J］.河北大学学报(自然科学版),2026,46(4):359-366.DOI:10.3969/j.issn.1000-1565.2026.04.003钢箱梁桥斜交梁段栓接处动力学特性与仿真分析杨三强,李成旺,刘琦,高毅松,刘娜(河北大学建筑工程学院,河北省基础设施防灾减灾与智能评估重点实验室,河北保定 071002)摘要:钢箱梁桥斜交梁段栓接处受力状态复杂,是桥梁设计与施工面临的关键技术难题. 依托G102线秦皇岛上跨京哈高速公路预应力混凝土钢箱梁桥建设项目,采用仿真分析技术与线形监测技术,获取了斜交梁段高强度摩擦型螺栓群内应力变化规律;借助ANSYS有限元软件构建了斜交梁段高强度摩擦型螺栓群力学模型,分析了不同连接方式下的斜交梁段变形特征,得到了最优连接方式,揭示了高强度摩擦型螺栓群动力学特性. 动荷载数据显示,螺栓群不利受力位置为第5列、第15列;螺栓群在受到动荷载时,高强度摩擦型螺栓群剪应力最大值近似马鞍形分布,其主要特征是螺栓群两侧剪应力最大、中间剪应力最小、从螺栓群两侧向中间递减. 数值仿真分析结果表明,相同荷载条件下铆接的剪应力最大值约为高强度摩擦型螺栓连接的177%,焊接的应力最大值约为高强度摩擦型螺栓连接的440%,证实了栓接为最优连接方式.研究结果对钢箱梁桥螺栓群结构的设计、施工和监测具有重要的科学依据和工程参考.关键词:钢箱梁;连接方式;高强度摩擦型螺栓群;数值仿真;动力学特性中图分类号:U441 文献标志码:A 文章编号:1000-1565(2026)04-0359-08DOI:10.3969/j.issn.1000-1565.2026.04.003Dynamic characteristics and simulation analysis of bolted joint of skew girder section of steel box girder bridgeYANG Sanqiang, LI Chengwang, LIU Qi, GAO Yisong, LIU Na (Key Laboratory of Infrastructure Disaster Mitigation and Intelligent Assessment of Hebei Province, College of Civil Engineering and Architecture, Hebei University, Baoding 071002, China)Abstract:The mechanical state of bolted joints in skewed girder sections of steel box girder bridges is complex, posing a key technical challenge in bridge design and construction. Based on the construction project of the prestressed concrete steel box girder bridge over the Beijing-Harbin expressway on the Qinhuangdao section of G102 national highway, simulation analysis and linear monitoring technologies were adopted to obtain the internal stress variation law of high-strength friction bolt groups in skewed girder sections. A mechanical model of high-strength friction bolt groups in skewed girder sections was established using ANSYS finite element software, and the deformation characteristics of skewed girder sections under different connection modes were analyzed, the optimal connection mode was obtained, and the dynamic characteristics of high-strength friction bolt groups were revealed. The dynamic load data show that the most unfavorable positions of the bolt group are the 5th and 15th columns. Under dynamic load, the maximum shear stress of the high-strength friction bolt group presents an approximately saddle-shaped- 收稿日期:2025-02-21;修回日期:2026-04-09 基金项目:河北省高等学校科学技术研究项目(CXY2024012);河北省交通运输厅科技项目(202312;202305) 第一作者:杨三强(1980—),男,河北大学教授,博士生导师,主要从事桥梁监控、公路路基和路面材料方向研究.E-mail: ysq0999@163.com 第4期杨三强等:钢箱梁桥斜交梁段栓接处动力学特性与仿真分析河北大学学报(自然科学版) 第46卷distribution, which is mainly characterized by the maximum shear stress at both sides of the bolt group and the minimum shear stress in the middle, decreasing gradually from both sides to the middle of the bolt group. The numerical simulation results show that under the same load conditions, the maximum shear stress of riveted connections is about 177% of that of high-strength friction bolted connections, and the maximum stress of welded connections is about 440% of that of high-strength friction bolted connections, confirming that bolted connection is the optimal connection mode. The research results provide important scientific basis and engineering reference for the design, construction and monitoring of bolt group structures in steel box girder bridges.

Key words: steel box girder, connection mode, high-strength friction bolt group, numerical simulation, dynamic characteristics

CLC Number:

U441

YANG Sanqiang, LI Chengwang, LIU Qi, GAO Yisong, LIU Na. Dynamic characteristics and simulation analysis of bolted joint of skew girder section of steel box girder bridge[J]. Journal of Hebei University(Natural Science Edition), 2026, 46(4): 359-366.

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