|Table of Contents|

Detection and assessment on existing stress of PC girder bridge based on horizontal tension-increment method(PDF)

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

Issue:
2012年02期
Page:
70-73,81
Research Field:
Publishing date:

Info

Title:
Detection and assessment on existing stress of PC girder bridge based on horizontal tension-increment method
Author(s):
LI Shi-an1;  HE Shuan-hai1;  LOU Cheng2;  SONG Yi-fan1;  ZHANG Gang1
1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Liaoning Province Administration of Freeway, Shenyang 110167, Liaoning, China
Keywords:
bridge engineering;  PC girder bridge;  effective prestress test;  horizontal tension-increment method;  stretching force tester
PACS:
U446.3
DOI:
-
Abstract:
Aimed at the prestress loss on present prestressed concrete bridges, based on the principle of static equilibrium, a real bridge pre-tension was detected by horizontal tension-increment method, the intersecondary incremental way on linear condition was used to eliminate the errors. The existing stress value of target steel beam of service bridge was worked out and compared with the standard theoretical value. The results show that the effective prestress values of 3 beams among 8 positive moment beams in the measured box girder are less than the theoretical values from 13.36% to 23.7%, the measured values of 4 negative moment beams at pier top are bigger than the theoretical values from 16.86% to 24.59%, that indicates the prestress loss of PC girder bridge is more serious, the girder stiffness is declined. 6 tabs, 2 figs, 9 refs.

References:

[1] 张元海,刘世忠.后张法预应力混凝土梁钢束预应力损失研究[J].中国公路学报,2002,15(2):76-78. ZHANG Yuan-hai,LIU Shi-zhong.Study of the loss of pre-stress of tendon in post-tensioned prestressed concrete beams[J].China Journal of Highway and Transport,2002,15(2):76-78.
[2]谢功元.在役混凝土梁永存预应力试验研究[D].西安:长安大学,2004.
[3]Waldron C J.Investigation of long-term prestress losses in pretensioned high performance concrete girders[D].Virginia:The Virginia Polytechnic Institute and State University,2004.
[4]王春生,成 锋.钢桥腹板间隙面外变形疲劳应否力分析[J].建筑科学与工程学板,2010,27(1):65-72. WANG Chun-sheng,CHENG Feng.Out-of-plane distortional fatigue stress analysis at web gaps of steel bridges[J].Journal of Architecture and Civil Engineering,2010,27(1):65-72.
[5]刘龄嘉,贺拴海,赵小星.基于动力性能的PC梁有效预应力预测[J].长安大学学报:自然科学版,2009,29(6):37-40. LIU Ling-jia,HE Shuan-hai,ZHAO Xiao-xing.Effective prestress forecast of PC beam based on dynamic performance[J].Journal of Chang'an University:Natural Science Edition,2009,29(6):37-40.
[6]郑 丹,郭启华.无粘结预应力粗钢筋在斜拉梁桥中的应用[J].筑路机械与施工机械化,2011,28(1):70-72. ZHENG Dan,GUO Qi-hua.Application of unbound prestressed crude steel in cable-stayed bridges[J].Road Machinery & Construction Mechanization,2011,28(1):70-72.
[7]王标才.基于应力释放法的预应力空心板桥现存应力检测的模型试验研究[D].重庆:重庆交通大学,2009.
[8]JTG D62—2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].
[9]JTG/T J21—2011,公路桥梁承载能力检测评定规程[S].

Memo

Memo:
-
Last Update: 2012-04-30