|Table of Contents|

Mechanical properties of strengthening hollow slab bridge based on beam-reduction and rib-addition method(PDF)

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

Issue:
2012年06期
Page:
38-43
Research Field:
Publishing date:

Info

Title:
Mechanical properties of strengthening hollow slab bridge based on beam-reduction and rib-addition method
Author(s):
PU Guang-ning1; 2;  ZHAO Yu1;  SONG Yi-fan1
1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Zhongjiao Tongli Construction Co Ltd, Xi'an 710075, Shaanxi, China
Keywords:
bridge engineering;  beam-reduction and rib-addition method;  strengthening;  hollow slab;  strain;  deflection
PACS:
U445.72
DOI:
-
Abstract:
In order to study the mechanical properties of hollow slab bridges before and after strengthening and verify the strengthening effect, based on a practical example of a 30 m span prestressed hollow slab bridge, the variation and discipline of the main mechanical properties of a hollow slab bridge before and after strengthening with beam-reduction and rib-addition method were discussed through the analysis and comparison of the data from static test before and after strengthening. The results show that the test cross-sectional stress and deflection of the hollow slab bridge after strengthening with beam-reduction and rib-addition method are greatly decreased and the transverse distribution tends to be uniform comparison of strain and deflection measured values before and after strengthening reflects that after strengthening bridge test section measured strain value is 27% to 83% of that before strengthening, measured deflection value after strengthening is 28% to 45% of that before strengthening, and the stress and deflection are reduced significantly, which indicates that the old beam plate stress state is improved apparently and the carrying capacity is improved effectively after strengthening and the strengthening effect is obvious. 1 tab, 18 figs, 10 refs.

References:

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Last Update: 2012-12-30