原文传递
Shear Deformations of RC Beams under Service Loads
| 题名： | Shear Deformations of RC Beams under Service Loads |
| 正文语种： | 英文 |
| 作者： | Zhi-Qi He; Zhao Liu; Zhongguo John Ma, F.ASCE |
| 作者单位： | Southeast Univ |
| 关键词： | Reinforced concrete; Shear deformation; Shear stiffness; Truss model; Concrete and masonry structures. |
| 摘要： | Shear deformations of rein forced concrete (RC) beams are not negligible after shear cracking. However, unlike the well-established procedure for calculating bending deformations of cracked beams, the calculation of shear deformations is still ignored in codes of practice due to a lack of practical models. This study aims to develop a practical approach for estimating instantaneous shear deformations of RC beams under service loads. Based on the truss analogy, an explicit equation for evaluating the yield shear stiffness of fully diagonally cracked beams is derived. It is discovered that the shear retention factor (ratio of the yield shear stiffness to the initial elastic shear stiffness) is approximately the cubic root of the shear-reinforcement ratio. An analytical approach for evaluating the degradation of effective shear stiffness and the development of shear deformation is proposed. Two restrained I-beams with thin webs are tested. This test and shear-deformation tests available in the literature are used to validate the analytical approach. DOI: 10.106l/(ASCE)ST.1943-541X.0001641. © 2016 American Society of Civil Engineers. |
| 出版日期： | 2017.01 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.01 |
| 页码： | 04016153 |
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