Research on seismic performance of shear walls with concrete filled steel tube columns and concealed steel trusses |
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Authors: | Wanlin Cao Jianwei Zhang Hongying Dong Min Wang |
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Institution: | [1]College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China [2]Key Lab of Urban Security and Disaster Engineering, MOE, Beijing 100124, China [3]Patent Examination Cooperation Center, State Intellectual Property Office of the People's Republic of China, Beijing 100190, China |
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Abstract: | In order to further improve the seismic performance of RC shear walls, a new composite shear wall with concrete filled steel
tube (CFT) columns and concealed steel trusses is proposed. This new shear wall is a double composite shear wall; the first
composite being the use of three different force systems, CFT, steel truss and shear wall, and the second the use of two different
materials, steel and concrete. Three 1/5 scaled experimental specimens: a traditional RC shear wall, a shear wall with CFT
columns, and a shear wall with CFT columns and concealed steel trusses, were tested under cyclic loading and the seismic performance
indices of the shear walls were comparatively analyzed. Based on the data from these experiments, a thorough elastic-plastic
finite element analysis and parametric analysis of the new shear walls were carried out using ABAQUS software. The finite
element results of deformation, stress distribution, and the evolution of cracks in each phase were compared with the experimental
results and showed good agreement. A mechanical model was also established for calculating the load-carrying capacity of the
new composite shear walls. The results show that this new type of shear wall has improved seismic performance over the other
two types of shear walls tested. |
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Keywords: | shear wall concrete filled steel tube (CFT) concealed steel truss seismic performance experimental research |
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