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Steel and Composite Structures Volume 34, Number 6, March25 2020 , pages 783-794 DOI: https://doi.org/10.12989/scs.2020.34.6.783 |
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Compressive behavior of rectangular sandwich composite wall with different truss spacings |
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Ying Qin, Xin Chen, Wang Xi, Xing-Yu Zhu and Yuan-Ze Che
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| Abstract | ||
| Steel-concrete-steel sandwich composite wall is composed of two external steel plates and infilled concrete core. Internal mechanical connectors are used to enhance the composite action between the two materials. In this paper, the compressive behavior of a novel sandwich composite wall was studied. The steel trusses were applied to connect the steel plates to the concrete core. Three short specimens with different truss spacings were tested under compressive loading. The boundary columns were not included. It was found that the failure of walls started from the buckling of steel plates and followed by the crushing of concrete. Global instability was not observed. It was also observed that the truss spacing has great influence on ultimate strength, buckling stress, ductility, strength index, lateral deflection, and strain distribution. Three modern codes were introduced to calculate the capacity of walls. The comparisons between test results and code predictions show that AISC 360 provides significant underestimations while Eurocode 4 and CECS 159 offer overestimated predictions. | ||
| Key Words | ||
| truss spacing; sandwich composite wall; compressive behavior; strength | ||
| Address | ||
| Ying Qin, Xin Chen, Wang Xi, Xing-Yu Zhu and Yuan-Ze Che:Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, Nanjing, China | ||