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Steel and Composite Structures Volume 48, Number 3, August 2023 , pages 321-333 DOI: https://doi.org/10.12989/scs.2023.48.3.321 |
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Lateral stiffness of corner-supported steel modular frame with splice connection |
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Yi-Fan Lyu, Guo-Qiang Li, Ke Cao, Si-Yuan Zhai, De-Yang Kong, Xuan-Yi Xue and Heng Li
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| Abstract | ||
| This paper proposes a comprehensive investigation on lateral stiffness of corner-supported steel modular frame using splice connection. A full-scale modular frame with two stacked steel modules under lateral load is tested. Ductile pattern in the transfer of lateral load is found in the final failure mode. Two types of lateral stiffness, including tangent stiffness and secant stiffness, are defined from the load-displacement due to the observed nonlinearity. The difference between these two types of stiffness is found around 20%. The comparisons between the experimental lateral stiffness and the predictions of classical methods are also conducted. The D-value method using hypothesis of independent case is a conservative option for predicting lateral stiffness, which is more recommended than method of contraflexural bending moment. Analyses on two classical shortrod models, including fix-rod model and pin-rod model, are further conducted. Results indicate that fix-rod model is more recommended than pin-rod model to simplify splice connection for simulation on lateral stiffness of modular frame in elastic design stage. | ||
| Key Words | ||
| d-value method; lateral stiffness; modular frame; parametric study; short-rod model | ||
| Address | ||
| Yi-Fan Lyu"Department of Civil and Environmental Engineering, National University of Singapore, Singapore 119077 Guo-Qiang Li:College of Civil Engineering, Tongji University, Shanghai, China, 200001 Ke Cao:1)School of management science and real estate, Chongqing University, Chongqing, China, 400044 2)6Research Center for Construction Economics and Management, Chongqing University, Chongqing, China, 400044 Si-Yuan Zhai:College of Civil Engineering, Chongqing University, Chongqing, China, 400044 De-Yang Kong:Department of Civil and Environmental Engineering, National University of Singapore, Singapore 119077 Xuan-Yi Xue:College of Civil Engineering, Chongqing University, Chongqing, China, 400044 Heng Li:Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong | ||