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| Reasonable Layout of Prestressing Strand |
| GONG Wei1，HU Wen-bin2 |
| 1. The Third Railway Survey & Design Institute Group Corporation, Tianjin 300251，China; 2. Guangzhou Huanan Road & Bridge Industry Group Corporation, Guangzhou, Guangdong 510635，China |
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Abstract Research purposes: In fundamental construction, the use of preatressed concrete continuous beam is more and more popular. Engineering quality, construction costs and service life are influenced by the reasonableness layout place of prestressing strand. Aiming at the characteristics of under press of prestressed concrete continuous beam, a justified location for prestressing strand is designed.
Research conclusions: In statically indeterminate beam, press line of concrete has something with eccentric distance in beam end and the shape in girder span of bundled bars, and has nothing with eccentric distance in middle support. It would static , no matter how to alter eccentric distance in middle support , so long as maintain the location of the two ends and shape of bundled bars.
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Received: 29 February 2008
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[1] 范立础.桥梁工程[M].北京:人民交通出版杜，2001.
[2] 叶见曙.结构设计原理[M].北京:人民交通出版社， 1997.
[3] JTG D62-2004，公路钢筋混凝土及预应力混凝土桥涵设 计规范[S].
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2008, Vol. 25 
