Comparative Study on Compressive and Flexural Properties of Concrete-Filled Steel Tubular Arch Joints

Huibin Sun, Wei Lu, Jiancai Wang, Quangang Ren, Xin Xu, Debin Han, Xu Li, Huixiang Yang, Lianbang Wei and Yan Liu
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Huibin Sun: School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, China
Wei Lu: Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China
Jiancai Wang: Shandong Hi-Speed Construction Management Group Co., Ltd., Jinan 250014, China
Quangang Ren: Shandong Hi-Speed Qilu Construction Group Co., Ltd., Jinan 250021, China
Xin Xu: Shandong Hi-Speed Qilu Construction Group Co., Ltd., Jinan 250021, China
Debin Han: Shandong Hi-Speed Qilu Construction Group Co., Ltd., Jinan 250021, China
Xu Li: Shandong Hi-Speed Qilu Construction Group Co., Ltd., Jinan 250021, China
Huixiang Yang: School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, China
Lianbang Wei: Shandong Hi-Speed Qilu Construction Group Co., Ltd., Jinan 250021, China
Yan Liu: Shandong Hi-Speed Qilu Construction Group Co., Ltd., Jinan 250021, China

Sustainability, 2022, vol. 14, issue 14, 1-16

Abstract: Studying the bearing mechanism of concrete-filled steel tubular (CFST) arch components and constructing the quantitative design method of the CFST arch is an important subject in underground support. In order to clarify the bending and compression properties of CFST arch joints, considering different structural parameters of the joint, bending and compression tests of square CFST components without joints, with tubular joints and with flange joints were carried out. The mechanical properties and failure modes of the bending and compression combinations of each component were analyzed, and the influence of structural parameters of joints on their bearing capacity was clarified. The results show that (1) the failure mode of the component without a joint and the component with a tubular joint present uniform curve deformation, and the flange joint presents typical brittle failure and broken line failure; (2) compared to the specimens without a joint and with a flange joint, the tubular joint has higher yielding strength and ultimate strength due to the strengthening effect of the tubular joint, while the bending bearing capacity is 623.639 KN; (3) the tubular length and flange thickness are the key structural parameters of the two types of joints, which have a significant influence on the bending capacity of the specimens; (4) the tubular joint has a simple structure and high bearing capacity, so it should be used as the preferred joint connection form of the concrete-filled steel tubular support arch in deep mine roadways with complex conditions.

Keywords: square concrete-filled steel tubular arch; tubular joint; flange joint; mechanical properties of compression and bending; parameter influence mechanism (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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