Research on web cracking control of long span PC box girder bridge
LIU Shan-hong~1,QIAN Yong-jiu~2(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)
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 effective method of retaining prestressing in short tendons.
【CateGory Index】： U448.215