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Prestressed concrete box girder strengthened with comsposition of steel plate and concrete(PDF)

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

Issue:
2012年03期
Page:
58-62
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Prestressed concrete box girder strengthened with comsposition of steel plate and concrete
Author(s):
SHI Xiong-wei1; 2;  YUAN Zhuo-ya2;  MA Yu-quan2;  FENG Wei2;  CHEN Li2
1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Xi'an Research Institute of Highway, Xi'an 710054, Shaanxi, China
Keywords:
bridge engineering;  steel plate and concrete;  composite strengthening;  space finite element;  loading test;  bending resistance
PACS:
U441
DOI:
-
Abstract:
In order to study the application of steel plate and concrete composite strengthening(SPCCS)technology in bridge reinforcement, a formulation for calculating ultimate bearing resistance of prestressed concrete box girder was presented. A nonlinear finite element model was established using ANSYS with right material parameters for a prestressed concrete box girder bridge which was damaged in a fire and strengthened with SPCCS. A comparison was made between numerical analysis results and function formula data.A loading test was carried out to verify the effect, the results of SPCCS and steel plate strengthening were compared. The results show that the deviation of numerical analysis results and function formula data is within 5%, the ultimate bending capacity of important section is improved over 30%, the verification coefficient of strain is reduced to the one from 0.57 to 0.70, the bending deflection is decreased significantly, the fundamental frequency of structure is improved by 19%, the ratio of theoretical and observed value of the load distribution coefficient is from 0.93 to 1.05, the strain verification coefficient of beams which is reinforced with SPCCS is reduced to the one from 0.66 to 0.82, it is more reasonable and relatively homogeneous. The collaboration of structure become better than before, it is helpful to improve the structural force performance. 5 tabs, 7 figs, 13 refs.

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Last Update: 2012-08-20