Open AccessRationality Analysis of Continual Improvement of a Simply Supported T Beam Bridge
Author(s) -
Yang Ya-lin,
Dai Li,
Jiang Xiang-lin
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/304/3/032103
Subject(s) - pier , structural engineering , deflection (physics) , cracking , bearing capacity , beam (structure) , beam bridge , prestressed concrete , bending moment , engineering , span (engineering) , materials science , physics , optics , composite material
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