期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：304
期号：3
页码：1-8
DOI：10.1088/1755-1315/304/3/032103
出版社：IOP Publishing
摘要：A 40m prestressed concrete simply supported T beam in continuous transformation and reinforcement, because the T beams is thin, and there is no suitable T concrete diaphragm that can share the anchorage force, can not guarantee the reliability of prestressed anchoring system. This paper puts forward a new method to construct the pier top continuous transformation, and analyzes and discusses the rationality of the two construction schemes. Midspan construction loading and bearing pre-top construction reformation have not improved the T beam bearing capacity, which can improve the force of the structure, the calculation results show that the bending moment is close to the bending capacity of the middle span after the continuous transformation., and improve the effect is not obvious. In addition, the continuous structure and a new type of pier top continuous structure can not prevent the cracking of the pier top, and there is a risk of increasing the midspan deflection of T beams in the construction.
