中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2005, Vol. 24 ›› Issue (4): 19-22.

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大跨PC箱梁桥腹板裂缝的控制研究

刘山洪1,钱永久2   

  1. 1.西南交通大学交通运输工程博士后流动站,四川成都610031;2.西南交通大学土木工程学院,四川成都610031
  • 收稿日期:2004-04-08 修回日期:2004-09-02 出版日期:2005-08-15 发布日期:2015-05-18
  • 作者简介:刘山洪(1968一),男,重庆垫江人,副教授,博士后,主要研究方向为高性能预应力砼桥梁结构行为

Research on web cracking control of long span PC box girder bridge

LIU Shah—hong1 , QIAN Yong-jiu2   

  1. 1.Post-Doctoral Research Station of Traffic and Transp. Eng., Southwest Jiaotong University, Chengdu 610031, China;2.School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2004-04-08 Revised:2004-09-02 Online:2005-08-15 Published:2015-05-18

摘要: 本文对大跨预应力砼(Pc)箱梁桥从设计和施工两方面对如何有效地控制腹板裂缝进行了讨论,并给出了在 建的连续刚构桥纵向筋的部分预应力测试结果,现有夹片式预应力群锚张拉工艺和张拉设备存在着亟待改进的地 方,无粘结竖向预应力技术将成为确保竖向短力筋有效预应力的有效措施

关键词: 预应力砼, 箱梁桥, 腹板裂缝, 连续刚构

Abstract: How to control the web cracking of long span prestressed concrete(PC) box girder bridge from two aspects of design and construction effectively is discussed in this paper, and the partial test results of prestressing on longitudinal strands of continuous rigid frame bridge under construction is given out. It is urged to improve the prestressing procedure of jaw vice anchorage and the defects of prestressing facilities. The technique of unbonded tendons on vertical prestressing becomes an effecti

Key words: prestressed reinforced concrete, box girder bridge, cracks of web, continuous rigid frame

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