|Table of Contents|

Numerical analysis and optimal design for block on pier top of long span beam bridge(PDF)

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

Issue:
2011年04期
Page:
50-57
Research Field:
Publishing date:
2011-08-20

Info

Title:
Numerical analysis and optimal design for block on pier top of long span beam bridge
Author(s):
LI Wen-hua1; 2;  HE Shuan-hai1;  ZHAI Xiao-liang1; 2;  GUO Nan-nan2
1. School of Highway, Chang'an University, Xi'an 710064, Shannxi, China; 2.CCCC First Highway Consultants Co Ltd, Xi'an 710075, Shannxi, China
Keywords:
bridge engineering;  continuous beam;  continuous rigid frame;  block on pier top;  allowable stress intensification factor;  optimal design
PACS:
U443.22
DOI:
-
Abstract:
In order to optimize the analyzing method of block on the pier top of long span continuous beam bridge and continuous rigid frame bridge, the analysis method for size of geometric model, pre-stressing simulation method, loading method, boundary conditions simulation were presented. On the basis of numerical results, the effective practical analysis methods of block on pier top were obtained. Allowable stress intensification factor considering the effect of ratio of ordinary steel area to concrete was presented to further clarify the calculation results. Chamfering optimization design methods and a new form of block on pier top were proposed. The results show that:for the pier top block, the reference value of magnification factor of roof, floor and web stress is 1.05 and diaphragm is 1.10, chamfer is 1.55; as long as the finite element model of the pier top block size is large enough, the impact of calculation on the pier top block under different loading positions can be ignored; for continuous beam of the pier top block, the peak stresses of proposed bulkhead pier tilted top block of the partition part are greatly improved than the ones of vertical pier top block. 11 tabs, 4 figs, 9 refs.

References:

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Last Update: 2011-08-20