Behaviour of a novel stiffener-enhanced steel–concrete–steel sandwich beam subjected to impact loading. (August 2021)

• Record Type: Journal Article
• Authors: Wang, Yonghui; Lu, Jingyi; Liu, Suntao; Zhai, Ximei; Zhi, Xudong; Yan, Jia-Bao
• Is Part Of: Thin-walled structures. Volume 165(2021)
• Publication Date: 2021-08
• Subjects: Steel–concrete–steel beam -- Impact response -- Failure mode -- Analytical model -- Stiffener enhancement; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2021.107989
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: A new stiffener-enhanced steel–concrete–steel (SESCS) sandwich beam was proposed for impact resisting, and the dynamic response of the SESCS sandwich beam under low-velocity impact loading was experimentally, numerically and analytically studied. Drop weight impact loading tests on SESCS sandwich beams were first conducted to obtain their failure modes, impact forces and displacement responses. All the tested beams exhibited flexural failure modes, and the impact resistance was found to be significantly improved for the beam enhanced with stiffeners in the tension plate. The Finite Element (FE) model of the SESCS sandwich beam under impact loading was established and validated against the test data in terms of failure mode, impact force and displacement. In addition, an analytical model was also developed for predicting displacement response of the SESCS sandwich beam under impact loading. The analytical-predicted displacement responses were found to be well matched with the FE-predictions and test results, which demonstrated the accuracy of the proposed analytical model. Highlights: A new stiffener-enhanced steel–concrete–steel (SESCS) sandwich beam was proposed. Drop weight impact tests on the SESCS sandwich beams were conducted. Flexural failure mode was observed for the SESCS sandwich beams under impact load. An analytical model was proposed for predicting displacement response of the SESCS sandwich beam under impact load.