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Study on Deformation Control of Long-span Continuous Rigid Frame Bridge in Construction Stage

Author: YuanXinHong
Tutor: HuangAnLu
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: Continuous Rigid Frame Bridge Shrinkage and creep Loss of prestress Deform
CLC: U448.23
Type: Master's thesis
Year: 2011
Downloads: 46
Quote: 0
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Abstract


Continuous rigid frame bridge while maintaining the advantages of continuous beam expansion joints smooth driving , maintaining T - Frame advantage of no seat , no system conversion , so the rapid development of modern bridge construction . However, with the large span prestressed concrete continuous rigid frame bridge with large-scale construction of such bridges appear in the process of operation the beam cracking especially across the middle and lower torsion and other diseases , affect the normal use of the bridge . Thesis Xu ditch bridge as the research object , large span continuous rigid frame the bridge operators deformation study . Thesis has access to a large number of documents , elaborated shrinkage and creep mechanism and influencing factors and summarizes the calculation of the creep coefficient and shrinkage strain , deformation and stress of concrete creep and shrinkage and prestress loss of the main beam impact , summarized from various aspects of the design, construction , management measures to reduce Rigid Frame bridge Span Deflection . The results of the long-term monitoring of long span rigid frame bridge , deformation and stress-strain characteristics of the operational phase bridge . Establish a computational model of large span continuous rigid frame bridge , the analysis of different specifications , loading age and the environments relative humidity of concrete creep and shrinkage and loss of prestress deformation . Paper some of the findings in Xu ditch bridge operators monitoring the application , provide the basis for the scientific management of the Bridge Maintenance .

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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Rigid Frame Bridge
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