Abstract

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Title:: Analysis of Buckling for Prestressed Concrete Multi-beam T-shaped Structure

Author(s):: ZHANG Gang; JIANG Chang-an; LIU Yang; WANG Cui-juan; HE Shuan-hai; School of Highway, Chang’an University

Keywords:: structure engineering; pre-stressed concrete; multibeam Tshaped structure; unilateral fire; buckling; flange plate

Abstract:: In order to study the shape of buckling for pre-stressed concrete multi-beam Tshaped structure exposed to fire, the fire model for pre-stressed concrete multi-beam Tshaped structure exposed to unilateral fire was proposed, and the buckling calculation method was put forward. Moreover, the buckling law for pre-stressed concrete multi-beam Tshaped structure exposed to unilateral fire of girder was analyzed by ANSYS. The study results indicate that when bias girder is exposed to unilateral fire, transverse buckling of girder at quartile is obvious, it presents Wshape along longitudinal bridge span, deck presents a shape of buckling for single flange plate or double flange plates. Transverse buckling of girder presents Vshape when girder exposed to fire between bias and middle girders, its buckling value is high. Transverse buckling of girder presents a reversed Wshape when girder exposed to fire between middle girders, deck presents a convex shape. The obtained conclusion can provide scientific reference for estimating the pre-stressed concrete multi-beam Tshaped structure after fire.