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Shear Capacity of Prestressed Continuous Concrete Beams

机译：预应力连续混凝土梁的抗剪承载力

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摘要

A better part of the existing bridges of the German Federal Highways are built as prestressedrnconcrete continuous beams [1]. Since traffic loads have been rising since their construction, thernshear capacity of some bridges is insufficient according to current standards. However, the shearrncapacity of concrete beams can be increased in different ways, e.g. by using external tendons.rnIn this paper a research programme, funded by the Federal Highway Research Institute of Germanyrn(BASt) and carried out by the Institute of Structural Concrete at RWTH Aachen University, isrnpresented. Six tests on three continuous beams with parabolic tendons and additional externalrnprestressing are performed within this project. This paper presents the testing programme and arnpreliminary numerical analysis of the specimen in comparison with different approaches for therncalculation of the shear capacity.
机译：德国联邦公路现有桥梁中的较好部分是预应力混凝土连续梁[1]。由于自建造以来交通负荷一直在上升，所以根据当前标准，某些桥梁的剪力不足。但是，混凝土梁的抗剪承载力可以通过不同的方法来提高，例如，本文介绍了一项由德国联邦公路研究所（BASt）资助，由亚琛工业大学结构混凝土研究所执行的研究计划。在该项目中，对三个具有抛物线形筋的连续梁和附加的外部预应力进行了六个测试。与剪切强度的不同计算方法相比，本文介绍了试样的测试程序和初步数值分析。

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