|Table of Contents|

Analysis Method of Secondary Internal Forces of PC Continuous Beam(PDF)

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

Issue:
2007年02期
Page:
48-53
Research Field:
Publishing date:
2007-06-20

Info

Title:
Analysis Method of Secondary Internal Forces of PC Continuous Beam
Author(s):
KONG Xiang-fu1; 2;  ZHOU Xu-hong1; 3;  YU Kun3;  DI Jin1
1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Shandong Provincial Communications Planning and Design Institute, Jinan 250031, Shandong, China; 3. School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China
Keywords:
bridge engineering;  PC continuous beam;  prestress;  arrangement of tendon;  secondary internal force
PACS:
TU378.2
DOI:
-
Abstract:
With the prototype of continuous beam, authors analyzed the characteristics of prestress impact of diversified arrangements of tendons in elasticity stage. Firstly, authors studied the reasons that results in the secondary internal force were caused by prestressing force in PC continuous beam. Then, authors simplified the continuous bridge to two basic structural type, side-span and mid-span, and provided the secondary torque and bending moment at fix end expressing in parameters for various common arrangements of tendon including straight-line tendon, local tendon, polygonal prestress tendon and parabola prestress tendon. Meanwhile, authors analyzed the corresponding relationship between the distance from pressure line at beam end to gravity center, and the alignment for polygonal and parabola tendons, and summarized the characteristics of prestress impact of polygonal tendon and parabola tendon. Finally, taking a three-span continuous beam as example, authors compared the effects of secondary internal force caused by polygonal tendon and parabola tendon respectively. The results show that polygonal tendon affects the secondary internal force more than parabola tendons. The research offers reference for engineers to optimize the design of prestressing tendons.

References:

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Memo

Memo:
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Last Update: 2007-06-20