Work

An experimental investigation of the behaviour of 3D demountable column-beam-slab composite substructures after column removal

Year: 2025

Type: article

Abstract: This paper presents the experimental results of reduced scale (1:3) novel demountable steel-concrete composite structures consisting of columns, beams, and segmented slabs, after corner and edge column removal respectively, to investigate their progressive collapse behaviour. The slab segments were connected together by bent up reinforcement bars along the edges with secondary grouting between the segments. Their dynamic responses, load-displacement behavior, internal force redistribution, and failure mechanisms were systematically analyzed. The experimental results demonstrate that the novel demountable structural system exhibits excellent ductility and robustness performance. Even under very large deflections, the demountable structure using segmented slabs effectively transmitted both compressive and tensile forces, and the slabs behaved as monolithic reinforced slabs with in-situ cast concrete. Therefore, the conventional yield line theory for two-way spanning in-situ cast reinforced concrete slabs can be used for the demountable slabs of this research.

Source: Engineering Structures

DOI: 10.1016/j.engstruct.2025.121197

Authors: Jiejie Long, Yongchang Wang, Tao Yang

Institutions: Guangxi University, University of Manchester

Language: English

Topic: Structural Response to Dynamic Loads

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $4,620