|Table of Contents|

Experiment and FEM Analysis on Long-span Prestressed Beam String Pipes(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2007年04期
Page:
74-81
Research Field:
Publishing date:
2007-12-20

Info

Title:
Experiment and FEM Analysis on Long-span Prestressed Beam String Pipes
Author(s):
XUE Wei-chen1;  LIU Sheng1;  WANG Heng-dong2;  WEI Dan2
1. Department of Architectural Engineering, Tongji University, Shanghai 200092, China; 2. Shanghai Municipal Engineering Design General Institute, Shanghai 200092, China
Keywords:
long-span prestressed beam string pipe;  prestressed string beam;  model test;  nonlinear finite element full-range analysis;  buckling analysis
PACS:
TU393.3
DOI:
-
Abstract:
Based on a 100 m-span beam string pipe as an original type, a 1:15 scaled model was firstly tested to investigate the full-range behaviors of this structure during the stretching phase, normal serviceability phase and ultimate load carrying phase in China. Nonlinear finite element simulation for the test of full-range was conducted by using ANSYS software. In addition, buckling analysis simultaneous considering initial geometrical imperfection and geometrical nonlinear was performed by combining uniform imperfections mode method and cylindrical arc length method. The results show that the whole structural deformations and member stresses increase relatively fast under half-span load, and the half-span load is disadvantaged for prestressed beam string pipe. The beam string pipe is sensitive to the out-plane initial geometrical imperfection; criticalbuckling load of the half-span is a little lower than that of full-span. This structure develops reliable stability and relatively large safety reserve with an ultimate load up to 2.68 times design load. The analytical results by using nonlinear finite element method analysis are in good agreement with the test results, which indicate that the nonlinear finite element method analysis is capable for the full-range simulation of prestressed beam string pipes.

References:

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Last Update: 2007-12-20