|Table of Contents|

High temperature deformation of reinforcement concrete beam bridges exposed to fire(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年01期
Page:
54-58
Research Field:
Publishing date:
2009-01-20

Info

Title:
High temperature deformation of reinforcement concrete beam bridges exposed to fire
Author(s):
ZHANG Gang1;  HE Shuanhai1;  GUO Qi2;  SONG Yifan1
1. Key Laboratory for Bridge and Tunnel of Shaanxi Province, Changan University, Xian 710064, Shaanxi, China; 2. School of Civil Engineering, Xian University of Architecture and Technology, Xian 710055, Shaanxi, China
Keywords:
bridge engineering;  reinforcement concrete(RC);  simply supported beam;  high temperature deformation;  nonlinear FEM
PACS:
TU375.1； TU352.5
DOI:
-
Abstract:
The temperature field distributions of rectangle section for RC simply supported beams exposed to the ISO834 standard fire are studied by numerical simulation program, and the influence laws of the covering layer thickness and load grades on the timeindependent deformation of RC beams at high temperature are presented. Based on mechanical balance principle and influence parameters, the model of inner force integration is proposed, and the nonlinear acceleration iteration equation is deduced with geometric progression. The simulation results indicate that the covering layer thickness has a great contribution to the deflection of RC simple beams, the timedependent curves for defleetion presents a nonlinear increase tendency with the raise of load grades; and its increase degree decrease with the increase of covering layer thickness; the increment of covering layer thickness is effective to fire resistance and control of deformation for RC simple beams. 8 figs, 10 refs.

References:

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Last Update: 2009-01-20