Experimental and topology optimization design study of the shear behaviour of reinforced concrete I-beam web with opening. Issue 9 (2nd September 2022)

• Record Type: Journal Article
• Authors: Wang, Leijia; Zhu, Mingqiao; Yue, Wenhui; Dong, Jiarui
• Is Part Of: Engineering optimization. Volume 54:Issue 9(2022)
• Page Start: 1509
• Page End: 1524
• Publication Date: 2022-09-02
• Subjects: Multidisciplinary design -- structural optimization -- strut-and-tie model -- I-beam -- shear behaviour; Engineering design -- Periodicals; Mathematical optimization -- Periodicals; 620.0042
• DOI: 10.1080/0305215X.2021.1947266
• Languages: English
• ISSNs: 0305-215X

Abstract

Abstract : To study the design method of openings on the web of an I-beam, three I-beams with different circular holes were designed using the traditional truss mechanism, and the circular holes were reinforced by ring stirrups. A shear test was performed to study the failure modes of the I-beams and efficiency of the ring stirrups. A new method for establishing the truss mechanism was proposed, which used the windowed evolutionary structural optimization method to calculate the topology optimization solution of the I-beam. From the topology optimization results, the strut-and-tie model (STM) was established, which revealed the stress mechanism of the I-beam. Via the STM, the optimal shape and location for the opening of the I-beam under shear load states were presented. The quantity of reinforcing bars, porosity and ultimate load of the I-beam designed by the STM were, respectively, 0.67, 5.5 and 1.2 times those of the experimental model.