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首页> 外文会议>SP-228; International Symposium on Utilization of High-Strength/High-Performance Concrete vol.1; 20050620-24; Washington,DC(US) >Shear Capacity of Beams Made of High-Performance Concrete
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Shear Capacity of Beams Made of High-Performance Concrete

机译：高性能混凝土梁的抗剪承载力

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摘要

The shear capacity of stirrup-reinforced concrete elements consists generally of a portion modeled by a truss V_(truss) and an exceeding concrete contribution V_c. Recent research results assign a portion of the concrete contribution to the effect of aggregate interlock. After shear cracking, a relative displacement of the crack edges occurs activating friction forces upon the rough crack edges with increasing load. In such a model the concrete contribution is considered solely by a more flat strut inclination θ, and accordingly a truss model can describe the whole shear-capacity. In addition, the shear behavior of high strength concrete is different than ordinary concrete, presumable due to the different shear transfer mechanisms across the shear cracks. However, the experimental and theoretical investigations conducted show that the truss model only describes a part of the whole shear capacity. There is an exceeding remaining load-bearing system. Based on the research results a design model for shear is developed which is applicable for high performance as well as ordinary concrete.
机译：箍筋混凝土构件的抗剪承载力通常由以桁架V_（truss）建模的部分和超出混凝土的分量V_c组成。最近的研究结果将部分具体贡献归因于骨料互锁的作用。在剪切裂纹之后，裂纹边缘会发生相对位移，从而随着载荷的增加而在粗糙裂纹边缘上产生摩擦力。在这样的模型中，仅通过更平坦的支柱倾角θ来考虑混凝土的贡献，因此桁架模型可以描述整个剪切能力。另外，推测高强度混凝土的剪切性能与普通混凝土不同，这可能是由于跨剪切裂缝的剪切传递机制不同所致。但是，进行的实验和理论研究表明，桁架模型仅描述了整个剪切能力的一部分。有一个超出的剩余承载系统。根据研究结果，开发了适用于高性能混凝土和普通混凝土的剪切设计模型。

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