Bearing capacity of H-section beam wrapped with ceramsite concrete

Xuechun Liu, Kun Meng, Ailin Zhang, Tao Zhu and Cheng Yu

Abstract

In this study, an H-section steel beam with circular holes in a web wrapped with ceramsite concrete (SBWCC) was studied. Static load-bearing capacity tests and finite element analysis were performed on two groups of specimens with different sections. The H-section steel and wrapped ceramsite concrete were well bonded. The load-bearing capacity of the SBWCC was 10% larger than that of the pure H-section steel beam without holes in the web, except for its dead weight. The stiffness of the SBWCC was slightly larger than that of the pure H-section steel beam without holes. The wrapped ceramsite concrete avoided the elastic local instability of the steel beam flange and web. Based on the finite element model verified by experiments, the influences of hole diameter, hole spacing, and U-shaped stirrups on the flexural capacity of the specimens were analyzed. The formulas for the load-bearing capacities and short-term stiffness of the SBWCC were proposed and verified by tests and finite element analysis.

Key Words

ceramsite concrete; flexural performance test; load-bearing capacity; short-term stiffness; steel beam wrapped with concrete

Address

Xuechun Liu and Ailin Zhang: Beijing Engineering Research Center of High-Rise and Large-Span Pre-stressed Steel Structures, Beijing University of Technology, Beijing, 100124, PR China; Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing, 100124, PR China Kun Meng and Tao Zhu: Beijing Engineering Research Center of High-Rise and Large-Span Pre-stressed Steel Structures, Beijing University of Technology, Beijing, 100124, PR China Cheng Yu: Construction Engineering Technology Department of Engineering Technology, University of North Texas, Denton, TX 76207, USA

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