An investigation on the bearing capacity of steel girder-concrete abutment joints

IF 4 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Steel and Composite Structures Pub Date : 2021-01-01 DOI:10.12989/SCS.2021.38.3.319

Chen Liang, Yuqing Liu, Changjun Zhao, B. Lei, Jieliang Wu

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引用次数: 1

Abstract

To achieve a rational detail of the girder-abutment joints in composite integral bridges, and validate the performance of the joints with perfobond connectors, this paper proposes two innovative types of I-shaped steel girder-concrete abutment joints with perfobond connectors intended for the most of bearing capacity and the convenience of concrete pouring. The major difference between the two joints is the presence of the top flange inside the abutments. Two scaled models were investigated with tests and finite element method, and the damage mechanism was revealed. Results show that the joints meet design requirements no matter the top flange exists or not. Compared to the joint without top flange, the initial stiffness of the one with top flange is higher by 7%, and the strength is higher by 50%. The moment decreases linearly in both types of the joints. At design loads, perfobond connectors take about 70% and 50% of the external moment with and without top flange respectively, while at ultimate loads, perfobond connectors take 53% and 26% of the external moment respectively. The ultimate strengths of the reduced sections are suggested to be taken as the bending strengths of the joints.

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钢梁-混凝土桥台节点承载力研究

为了合理设计组合整体桥梁的梁-桥台节点，验证组合式桥梁节点的性能，本文提出了两种创新的组合式工字钢梁-混凝土桥台节点，既能最大限度地发挥承载力，又方便混凝土浇筑。两个节点之间的主要区别是顶法兰在基台内部的存在。通过试验和有限元方法对两个比例模型进行了研究，揭示了损伤机理。结果表明，无论是否存在上法兰，接头都满足设计要求。与无上法兰的节点相比，有上法兰的节点初始刚度提高7%，强度提高50%。在两种类型的关节中，力矩线性减小。在设计荷载下，带顶法兰和不带顶法兰时，perfobond连接器分别承担70%和50%的外部弯矩，而在极限荷载下，perfobond连接器分别承担53%和26%的外部弯矩。建议将节理截面的极限强度作为节点的抗弯强度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Steel and Composite Structures 工程技术-材料科学：复合

CiteScore

8.50

自引率

19.60%

发文量

审稿时长

7.5 months

期刊介绍： Steel & Composite Structures, An International Journal, provides and excellent publication channel which reports the up-to-date research developments in the steel structures and steel-concrete composite structures, and FRP plated structures from the international steel community. The research results reported in this journal address all the aspects of theoretical and experimental research, including Buckling/Stability, Fatigue/Fracture, Fire Performance, Connections, Frames/Bridges, Plates/Shells, Composite Structural Components, Hybrid Structures, Fabrication/Maintenance, Design Codes, Dynamics/Vibrations, Nonferrous Metal Structures, Non-metalic plates, Analytical Methods. The Journal specially wishes to bridge the gap between the theoretical developments and practical applications for the benefits of both academic researchers and practicing engineers. In this light, contributions from the practicing engineers are especially welcome.