# [1]贺志启,刘钊.小剪跨比RC梁受剪分析的优化拉压杆模型[J].东南大学学报(自然科学版),2014,44(2):345-349.[doi:10.3969/j.issn.1001-0505.2014.02.021] 　He Zhiqi,Liu Zhao.Optimal strut-and-tie model for shear analysis of RC deep beams[J].Journal of Southeast University (Natural Science Edition),2014,44(2):345-349.[doi:10.3969/j.issn.1001-0505.2014.02.021] 点击复制 小剪跨比RC梁受剪分析的优化拉压杆模型() 分享到： var jiathis_config = { data_track_clickback: true };

44

2014年第2期

345-349

2014-03-20

## 文章信息/Info

Title:
Optimal strut-and-tie model for shear analysis of RC deep beams

Author(s):
School of Civil Engineering, Southeast University, Nanjing 210096, China

Keywords:

U378.1
DOI:
10.3969/j.issn.1001-0505.2014.02.021

Abstract:
By means of multi-level analysis toward minimum strain-energy, an optimal approach for configuring strut-and-tie models in disturbed regions(D-regions)of concrete structures is proposed. First, a topology optimization analysis is used to determine the basic configuration, and then the optimal geometric parameters of the model is determined using the principal of minimum strain-energy. Employing the proposed approach, optimal strut-and-tie models are obtained for the shear analysis of RC(reinforced concrete)beams with small shear span-depth ratios. It is observed that in very deep beams(λ of approximately 1.0 or less), a single direct strut between the load point and the reaction is preferred for resisting loads; while in deep beams with λ between 1.0 and 2.0, a truss model with diagonal ties is the optimal load-carrying mechanism. Based on the optimal strut-and-tie models, a simplified equation for shear strength is derived for RC deep beams without web reinforcement, considering that the beams will approach shear failure when the diagonal ties fail in tension. Experimental verification shows that the proposed equation can properly reflect the influence of the shear span-depth ratio on the shear strength.

## 参考文献/References:

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