Experimental tests of slender reinforced concrete columns under combined axial load and lateral force
Experimental tests of slender reinforced concrete columns under combined axial load and lateral force
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DOI：
10.1016/j.engstruct.2011.08.003
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发表时间：
2011-12
影响因子：
5.5
通讯作者：
A. Barrera;J. Bonet;M. L. Romero;P. Miguel
中科院分区：
文献类型：
--
作者：
A. Barrera;J. Bonet;M. L. Romero;P. Miguel
高强混凝土(HSC)在柱中的使用已变得更加频繁，因为柱的横截面得到了显著的减小，这意味着在相同的轴向荷载和长度下，长细比增加，产生更高的二阶效应。然而，文献中的钢筋混凝土柱在轴力和水平力作用下的试验主要集中在剪跨比上，根据欧洲规范2(2004年)第5.6.3条，(M/(V⋅h))低于6.5。文献中的这一空白限制了构建这些结构元素的技术开发。本文进行了44个钢筋混凝土柱在恒定轴力和单调侧力作用下的试验研究。这样做的目的是为了更多地了解单元的类型，这也将有助于校准数值模型和验证简化方法。试验参数为混凝土强度(普通混凝土和高强混凝土)、剪跨比、轴压水平、纵向和横向配筋率。对柱的强度和变形进行了研究，对欧洲规范2(2004)和ACI-318(2008)中的简化方法进行了分析，得出结论：这两种方法都非常保守。
The use of high strength concrete (HSC) in columns has become more frequent since a substantial reduction of the cross-section is obtained, meaning that slenderness increases for the same axial load and length, producing higher second order effects. However, the experimental tests in the literature of reinforced concrete columns subjected to axial load and lateral force focus on shear span ratios, according to Eurocode 2 (2004), clause 5.6.3., (M/(V⋅h)) lower than 6.5. This gap in the literature limits technological development for the construction of these structural elements. This paper presents 44 experimental tests on reinforced concrete columns subjected to constant axial load and monotonic lateral force. The aim of this is to gain greater knowledge of the types of elements which will also be of use in calibrating the numerical models and validating the simplified methods. The test parameters are strength of concrete (normal- and high-strength concrete), shear span ratio, axial load level and longitudinal and transversal reinforcement ratios. The strength and deformation of the columns were studied, and an analysis of the simplified methods from Eurocode 2 (2004) and ACI-318 (2008) concluded that both are very conservative.