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Sectional stiffness and bending normal stress of oblique pier(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:
63-67
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Sectional stiffness and bending normal stress of oblique pier
Author(s):
LI Chuan-xi;  TAO Wei;  DONG Chuang-wen
School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha 410076, Hunan, China
Keywords:
bridge engineering;  oblique pier;  skew angle;  sectional stiffness;  bending normal stress
PACS:
U443.22
DOI:
-
Abstract:
The differences between oblique pier's stress and orthogonal pier's stress are mainly embodied in the sectional stiffness and bending normal stress. The enlarge of the oblique pier sectional stiffness along the direction of the bridge relative to the orthogonal pier was found through theoretical analysis. The formula of the oblique pier's bending normal stress which is expressed by the principal moment of inertia, skew angle, point coordinate of principal axis coordinate system was deduced. The relation of the section neutral axis's location and the skew angle under the action of bending moment which is along the direction of the bridge was got. Through the calculation of section moment of inertia of a real bridge's oblique pier, and the establishment of the finite element models for the calculation of bending normal stress, the conclusions were verified.The results show that the bending normal stress of one point in principal axis coordinate system changes with the change of skew angle, and there is an extreme value. The skew angle of this point corresponding to the maximum stress is only relation with the ratio of the x-coordinate to y-coordinate of the point in principal axis coordinate system. The apex of maximum bending stress of rectangular oblique pier(including hollow pier)has the most adverse oblique angle, the angle's analytical expression of rectangular solid pier and hollow pier are respectively obtained. 1 tab, 7 figs, 10 refs.

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Last Update: 2012-08-20