- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | LI Yongzhen, ZENG Han, LIU Hao, PAN Yi. Experimental Study on Flexural Behavior of Box-Shape Profiled Steel Sheet Integrating with System Effect[J]. Journal of Southwest Jiaotong University, 2023, 58(5): 1009-1016. doi: 10.3969/j.issn.0258-2724.20210670
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Box-shape profiled steel sheet is usually used as the bearing element, with external claddings and spacers together, they constitute a double-layer profiled steel sheet wall system. In order to study the influence of external cladding and spacers on the flexural behavior of box-shape profiled steel sheet, 8 double-layer profiled steel sheet composite specimens and 2 box-shape profiled steel sheet standard specimens were tested for both pressure and suction loading conditions. The influences of the stiffness of external cladding and the height of spacers on the bending capacity and flexural stiffness of the double-layer profiled steel sheet were analyzed. The test results showed that when the spacer height is 100 mm, compared with the standard specimen, the bending capacity can be increased by 27.6% and 111.3%, and the flexural stiffness by 17.3% and 56.7% for the composite specimens with external cladding type I and Ⅱ, respectively, under wind pressure loading condition; and the bending capacity can be increased by 32.1% and 77.6%, and the flexural stiffness can be increased by 29.4% and 48.1% respectively for wind suction case. When the external cladding is type Ⅱ, compared with the standard specimen, the bending capacity can be increased by 66.9% and 111.3%, and the flexural stiffness by 39.9% and 56.7% for the composite specimens with spacer height 200 mm and 100 mm, respectively, under wind pressure loading condition; and the bending capacity can be increased by 59.1% and 77.6%, and the flexural stiffness can be increased by 33.5% and 48.1% respectively for wind suction case. Thus considering the system effect of the external cladding and spacers, the bending capacity and flexural stiffness of the inner box-shape profiled steel sheet can be significantly improved, and greater stiffness of the external cladding can bring better performance. Based on theoretical analysis and Eurocode, combining with the influence of the stiffness of external cladding and the height of spacers, the global design formula of the box-shape profiled steel sheet is proposed, including system effect. The analytical results obtained using this formula coincide well with the experimental ones.
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