Seismic performance of reinforced concrete column-steel beam subassemblies considering effect of RC slab

被引：0

作者：

Men J. ^{[1
]}

Xiong L. ^{[1
,2
]}

Lei M. ^{[1
]}

Ren R. ^{[1
]}

Zhou T. ^{[1
]}

Li H. ^{[1
]}

机构：

[1] School of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an

[2] School of Civil Engineering, Chongqing Three Gorges College, Wanzhou

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 12期

关键词：

Concrete slab; Effective flange width; Failure mode; Quasi-static test; Seismic performance; Strain; Three-dimensional composite subassemblies;

D O I：

10.14006/j.jzjgxb.2018.0102

中图分类号：

学科分类号：

摘要：

The effect of RC slab on the seismic performance of reinforced concrete column-steel beam composite subassemblies under reversed cyclic loading is of fundamental importance in developing and validating nonlinear analysis models and conducting performance simulations. In this study, three specimens of the subassemblies between reinforced concrete column and steel beam subassemblies with different widths of the RC slabs were tested under reversed cyclic loading to investigate the influence of different RC slabs on the seismic performance of the mechanical behavior and the characters of failure model. All specimens with excellent ductility and energy dissipation exhibit the first plastic hinge at the bottom of steel beam in the loading process, and eventually fail due to the buckling of steel beam, the weld failure of steel band plate and the crushing of column concrete in the composite connections. Experimental results show that the flexural cracks become the main features in slab concrete. With the increase of the widths of the slab, the number of diagonal and horizontal shear cracks increases. The region of concrete crushed near the corner of slab is gradually enlarging. Additionally, results from this research present that the effect of the RC slab and steel beam composite which constrained the core concrete of the joint may obviously improve the seismic performance of three-dimensional composite subassemblies. Based on analysis of the strains of the slab concrete and the inner longitudinal rebars, the results prove that with the increase of the width of RC slab, the RC slab makes a limited contribution to the strength and stiffness of the composite subassemblies. By analyzing the mechanical behavior of reinforced concrete beam-column-slab subassemblies, the effective flange width for the steel-concrete composite beams is evaluated, which has a significant effect on the moment capacity of beam ends and the equivalent elastic moment of inertia values. © 2019, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：69 / 77and87

页数：7718

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