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Study on Stiffness Model of Cracked Pre-stressed Concrete Beams

Author: ZhouBo
Tutor: SongYiFan
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: Prestressed concrete beam with Effective stiffness Section analysis Effective prestressing Cracks statistical characteristics
CLC: TU378.2
Type: Master's thesis
Year: 2010
Downloads: 126
Quote: 4
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Abstract


With the development of transport , China has built a bridge to ten thousand . These bridges prestressed concrete bridge spanning capacity because of its light weight, durability , etc. has become widely accepted . With the growth of prestressed concrete bridge operation time , a large part of the varying degrees of cracking under the scratch disease . Cause analysis, domestic and foreign scholars and engineering and technical personnel of prestressed concrete beams research focuses on flexible bridge cracking down deflection of the main factors affecting the cracking of the structure and propose appropriate treatment measures . Condition assessment of prestressed concrete bridge in service with the injury , the country is still blank , there is an urgent need research work , how simple and effective assessment of prestressed concrete beam stiffness in Battle is an urgent need to solve the problem . This article from the cracking of prestressed concrete beam measured damage parameters ( measured steel beam prestressed or bending cracks statistical characteristics ) start application - sectional analysis, taking into account the non-linear characteristics of the material , cross - section equilibrium equations are derived based on the measured damage parameters proposed damage of prestressed concrete beam stiffness analysis method based on the measured damage parameter , prestressed concrete bridge after cracking stage stiffness assessment methods to explore . In this paper, the effective stiffness of the prestressed concrete beam cracked expression . T beam , for example , comparison of different constitutive relations section stiffness difference , compared with the existing norms . Change the ordinary reinforcement , prestressed steel beam with beam the steel beam prestressed size and concrete modulus of elasticity , the prestressed concrete beam section stiffness parameter analysis .

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CLC: > Industrial Technology > Building Science > Building structure > Concrete structure,reinforced concrete structure > Prestressed Concrete Structure > Girder
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