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Local contact analysis and improvement measures of continuous steel girder incremental launching(PDF)

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

Issue:
2012年04期
Page:
44-50
Research Field:
Publishing date:

Info

Title:
Local contact analysis and improvement measures of continuous steel girder incremental launching
Author(s):
TIAN Zhong-chu;  CHEN Yao-zhang;  ZHAO Li-ping;  CHENG Yong-zhou
School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410004, Hunan, China
Keywords:
bridge engineering;  steel girder;  incremental launching;  vertical curve of variable curvature;  hybrid finite element model;  face to face contact
PACS:
U443.3
DOI:
-
Abstract:
In order to study local force characters of the large span continuous steel tank girder incremental launching, taking a 6×90 m vertical curve of variable curvature continuous steel girder as the research object, the whole simulation model was set up by the software MIDAS 2006 with “beam remain still and only lower supports reverse move” method. Then based on the analysis results of the whole girder, a “beam-shell-solid-contact” hybrid finite element model was set up with ANSYS APDL and by means of Excel and CAD assistance under the unfavorable condition. The theoretical and measured values show that the steel girder local force meets the requirements at the sliding part, but the angular displacement is too large. According to the actual engineering situation, two effective improvements are suggested to solve a series of problems which are caused by the exaggerated angular displacement, the one is that the steps nose beam is adopted in the first measure, the second measure adopt a combination of steps nose beam, weights and increasing the stiffness of part of the steel beam. 6 tabs, 9 figs, 13 refs.

References:

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Last Update: 2012-08-30