Analysis of shear and total displacement of composite trough beam with corrugated steel web wrapped with steel plate: Theoretical solutions and the influencing factors

Abstract

Compared with traditional box beams, trough beams have the advantages of low building height, high space utilization, and low cost. The displacement of trough beams is an important indicator of its normal service limit state. Therefore, this study took the Composite Trough Beam with Corrugated steel web wrapped with Steel plate (CTBCS) as the research object, and explored the theoretical solutions of shear and total displacement of CTBCS and the key factors affecting the displacement. The energy method was used to analyze the shear displacement of CTBCS under different loading modes (the entire CTBCS was subjected to uniform loads, part of CTBCS was subjected to uniform loads and under multiple concentrated loads). Through experimental research, the displacement variation law of CTBCS with symmetric double concentrated loads was analyzed, and the experimental results, theoretical results, and simulated results were compared to prove the accuracy of the theoretical derivation formulas. In addition, the influence of different parameters such as waveform, number and thickness of corrugated steel webs on CTBCS displacement was studied, and measures were proposed to reduce the displacement of composite trough beams. This study can provide useful reference value for the development and application of composite trough beams.