Experimental investigation on shear behavior of steel beam-to-CFST column connections with irregular panel zone

A fractal Boussinesq equation for nonlinear transverse vibration of a nanofiber-reinforced concrete pillar

Experimental study of flush end plate beam-to-CFST column composite joints with deconstructable bolted shear connectors

Research on special-shaped concrete-filled steel tubular columns under axial compression

Reinforced concrete structures and structural members used in strategic infrastructures such as highway bridges, high-rise buildings, etc. are inherently subjected to lateral impact loads arising from the collision of vehicles, vessels, falling rocks, and rigid objects having different impact geometries, weights, and velocities. Due to the brittle nature of concrete materials, both localized and overall failure modes are very likely to occur in concrete structures under dynamic and impulsive loads. Hence, many attempts have been carried out in the literature to recognize the failure behaviors and to assess the vulnerability of concrete structure under lateral impact loads. This paper presents a comprehensive state-of-the-art review on the responses and failure behaviors of various types of concrete structures and structural members subjected to lateral impact loads based on analytical, numerical, and experimental studies carried out by the previous research works. In addition, the influences of various structural- and load-related parameters on the impact resistance and failure behaviors of different concrete structures under lateral impact loads are reviewed.

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State-of-the-Art Review on Responses of RC Structures Subjected to Lateral Impact Loads

Axial load behavior of L-shaped CFT stub columns with binding bars

Eccentric load behavior of L-shaped CFT stub columns with binding bars

Seismic behaviour of a through-beam connection between concrete-filled steel tubular columns and reinforced concrete beams

This paper investigates the axial compressive behaviour of T-shaped concrete-filled steel tube (CFST) stub columns with blinding bars. In this column system, binding bars are applied cross-through the section and produce confinement effects. Eleven specimens with binding bars and five ones without binding bars were tested under axial compressive loading. The experimental results demonstrate that, by setting binding bars, the local buckling failure modes are changed and the occurrence of local buckling is delayed, and the global outward bulge of the steel tube at the concave corners can be effectively restrained. The ultimate strength and ductility of the columns with binding bars can achieve up to 1.53 and 7.5 times higher than those of the columns without binding bars, respectively. Taking into consideration the contribution of binding bars, the confinement effects of steel tube and the other sectional characteristics, a method for predicting the ultimate axial compressive strength of the columns with or without blinding bars is established. The accuracy of the method is validated through comparisons of the experimental results reported in this paper and in other available open literatures.

Performance of T-shaped CFST stub columns with binding bars under axial compression

The current methods for calculating the inter-story harmful drift are evaluated, and new concepts of the inter-story average shear drift and the inter-story average rotation are proposed in this paper. The definitions and contents of the inter-story harmful and harmless drift are introduced. Four existing methods for calculating the harmful and harmless drift, including the secant method, tangent method, fixing floor method, and generalized shear deformation of region method are revisited, and the advantages as well as shortcomings of these methods are compared. Meanwhile, the misunderstanding in calculating the floor rotation is clarified. The inter-story average shear drift and the inter-story average rotation are proposed. In addition, the relationships among these proposed drifts and the harmful drift are derived, and are examined by the static and dynamic analysis of a simplified structural model. It demonstrates that the proposed drifts are effective in both static as well as dynamic analysis, and c...

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Zuo Zhiliang

Papers

Axial load behavior of L-shaped CFT stub columns with binding bars

Eccentric load behavior of L-shaped CFT stub columns with binding bars

Seismic behaviour of a through-beam connection between concrete-filled steel tubular columns and reinforced concrete beams

Performance of T-shaped CFST stub columns with binding bars under axial compression

Calculation Methods for Inter-Story Drifts of Building Structures