期刊
STRUCTURE AND INFRASTRUCTURE ENGINEERING
卷 12, 期 3, 页码 394-410出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/15732479.2015.1019893
关键词
RC beams; shear; strengthening; post-tensioned stirrups; nonlinear FE analysis; fibre beam model
资金
- Spanish Ministry of Economics and Competitiveness [BIA2012-36848]
- European Funds for Regional Development (FEDER)
- Government of Catalonia [2013 PDJ 00022]
Strengthening reinforced concrete (RC) elements critical to shear with prestressed transversal reinforcement can be an efficient method to increase the shear resistance of structures, allowing the development of the full flexural capacity. However, research on the performance of this technique is very limited, and methods for designing the optimum amount of prestressed transversal reinforcement and assessing the retrofitted structure have not been produced yet. Nonlinear finite element models are an important tool regarding predicting the efficiency of these interventions. In this paper, a shear-sensitive fibre beam formulation is extended in order to account for the effects of unbonded vertical external prestressed reinforcement in the structural response of RC beams. The model is validated with experimental tests available in literature, succeeding in capturing the gain of shear strength brought by different strengthening solutions. A parametric study is performed to find the optimal quantity of transversal reinforcement that ensures flexural failure mechanism in a beam with insufficient internal shear reinforcement. The relative simplicity of the numerical model makes it suitable for engineering practice.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据