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Influence of axial tension on the shear strength of RC beams without stirrups
Structural Concrete ( IF 3.2 ) Pub Date : 2020-08-04 , DOI: 10.1002/suco.202000077
Duc Toan Pham 1 , Bernard Fouré 2 , Nicolas Pinoteau 1 , Salim Abouri 3 , Romain Mège 1
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This contribution is addressing the investigation on the effect of axial tension on the shear strength of reinforced concrete beam elements without stirrups. The paper presents the results of a test program of 15 beams without stirrups that differed from each other mainly by the intensity of the axial tensile force N. During the tests, cracking was measured by Digital Image Correlation technique to identify the crack evolution mechanisms. After some consideration on the resisting mechanisms, the experimental results are compared with several code formulas to predict the shear strength VRc. Then an empirical formula is proposed for the variation of VRc between its two limits: the values for N = 0 and for VRc = 0 at the ultimate limit state of axial tension. This formula makes it possible to easily design for shear and tension.

中文翻译:

轴向张力对无箍筋RC梁抗剪强度的影响

这一贡献致力于解决轴向张力对无箍筋的钢筋混凝土梁单元抗剪强度影响的研究。本文介绍了15条不带箍筋的梁的测试程序的结果,这些梁的主要区别在于轴向拉力N的大小。在测试过程中,通过数字图像相关技术测量了裂纹,以确定裂纹的发展机理。在考虑了抵抗机理之后,将实验结果与几个编码公式进行比较,以预测抗剪强度V Rc。然后为V Rc在其两个极限之间的变化提出了经验公式:N = 0的值和在轴向张力的极限状态下,V Rc = 0。该公式可以轻松设计剪切力和张力。
更新日期:2020-08-04
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