|Table of Contents|

Mechanical behaviors of prestressed concrete beams after stress corrosion of prestressed reinforcement

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2014年06期
Page:
811-
Research Field:
Publishing date:

Info

Title:
Mechanical behaviors of prestressed concrete beams after stress corrosion of prestressed reinforcement
Author(s):
Li Congqi12Ge Wenjie13Cao Dafu1
1.College of Civil Science and Engineering,Yangzhou University,Yangzhou 225127,China; 2.Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China; 3.Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of
Keywords:
prestressed reinforcement stress corrosion prestressed concrete beams pit corrosion static cracking load ultimate load stiffness
PACS:
TU375.1
DOI:
-
Abstract:
In order to study the influences of stress corrosion of prestressed reinforcement on the bearing capacity and durability of prestressed concrete beams,7 prestressed concrete beams undergone simulated stress corrosion,i.e.pit corrosion,are tested by static flexural experiments.The experimental results show that the cracking load and ultimate load of prestressed concrete beams after stress corrosion of prestressed reinforcement are less than those of normal prestressed concrete beams and decrease with the increase of corrosion depth.Cracking load increases with the increase of prestress degree.Cracking load and ultimate load increase with the increase of non-prestressed reinforcement ratio.Stiffness decreases rapidly with the increase of corrosion depth.The decrease of the stiffness is slow down with the increase of prestress degree while non-prestressed reinforcement ratio has no obvious influence.The ultimate load calculation formulae of prestressed concrete beams after stress corrosion of prestressed reinforcement is given,and verified by experimental value,which can be used in practical engineering.

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Last Update: 2014-12-31