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首页> 外文期刊>Journal of bridge engineering >Full-Scale Testing of Shear Key Details for Precast Concrete Box-Beam Bridges
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Full-Scale Testing of Shear Key Details for Precast Concrete Box-Beam Bridges

机译：预制混凝土箱梁桥的剪切关键细节的全面测试

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摘要

Box-beam bridge shear key connection designs are investigated by conducting full-scale structural tests. The authors' evaluation included connection details, which are considered current good practice using high-strength nonshrink grout in combination with transverse posttensioning and novel details using ultra-high-performance concrete (UHPC). The factors that affect shear key performance, including simulated traffic loading, thermal loads, level of transverse posttensioning, and different connection designs, are presented in this paper. A simplified model for calculating the transverse shear is proposed, and the possible transverse tensile force caused by eccentrically placed loads is discussed. The performances of different connection details are presented and compared. The findings of the research can be used to assist bridge owners in the use of this economical bridge type and can provide innovative solutions that advance state-of-the-practice in bridge construction.
机译：通过进行全面的结构测试，研究了箱梁桥的剪力键连接设计。作者的评估包括连接细节，这些细节被认为是当前使用高强度非收缩灌浆结合横向后张法的良好实践，而使用超高性能混凝土（UHPC）的新颖细节被认为是目前的良好做法。本文介绍了影响剪切关键性能的因素，包括模拟交通荷载，热荷载，横向后张应力水平以及不同的连接设计。提出了一种简化的计算横向剪切力的模型，并讨论了偏心载荷引起的可能的横向拉力。呈现并比较了不同连接细节的性能。研究的结果可用于协助桥梁所有者使用这种经济的桥梁类型，并可以提供创新的解决方案，从而促进桥梁建设的最新实践。

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