Effects of Interface Roughness on Shear Performance of Composite Beams

WANG Ruwei; ZHANG Xinjiang; WANG Jingxian; HUANG Xuanming; GUO Xiaowei; JIANG Guoyong

doi:10.3724/j.gyjzG22122003

Volume 55 Issue 9

Sep. 2025

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2025 > 55(9): 185-192

WANG Ruwei, ZHANG Xinjiang, WANG Jingxian, HUANG Xuanming, GUO Xiaowei, JIANG Guoyong. Effects of Interface Roughness on Shear Performance of Composite Beams[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(9): 185-192. doi: 10.3724/j.gyjzG22122003

Citation:

WANG Ruwei, ZHANG Xinjiang, WANG Jingxian, HUANG Xuanming, GUO Xiaowei, JIANG Guoyong. Effects of Interface Roughness on Shear Performance of Composite Beams[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(9): 185-192. doi: 10.3724/j.gyjzG22122003

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Effects of Interface Roughness on Shear Performance of Composite Beams

doi: 10.3724/j.gyjzG22122003

1. CABR Testing Center Co., Ltd., Beijing 100013, China;
2. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;
3. Tianjin Fengqiao Construction and Residential Industry Corporation, Tianjin 300000, China

Received Date: 2022-12-20
Available Online: 2025-11-05

Abstract

Abstract

To study the effects of the roughness of the composite beam joint surface and the position of the joint surface on the shear performance of the composite beam， shear tests were conducted on five composite beam specimens and one monolithic beam specimen. The failure characteristics， damage evolution process， load-deflection curve， bearing capacity， and load-longitudinal strain curve of each specimen were compared and analyzed. The test results showed that the roughness of the joint surface had little influence on the initial crack development of composite beam specimens but a significant influence on the appearance and development of joint surface cracks. The coarser joint surface led to shorter misaligned cracks， less damage， and a higher peak load in the composite beam specimens. When the joint surface was closer to the compression zone， it led to a smaller cracking displacement and lower cracking load at the joint surface， as well as longer misaligned cracks. These factors significantly influenced the integrity of the specimens， and the peak bearing capacity of the specimens decreased significantly. The shear bearing capacity of the composite beam specimens with rough treatment of the joint surface was calculated according to the current Chinese and American codes. The calculated shear bearing capacity for the composite beam specimens with rough treatment was relatively conservative. However， when the construction state of the composite beam joint surface was poor—such as when the joint surface was smooth or lacked rough treatment—the design could not be carried out in accordance with the code， as the calculation results would be unsafe.
- composite beam,
- joint surface,
- roughness,
- shear performance,
- shear bearing capacity

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References(23)

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