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Experimental Model about Distributed Rule of Effective Prestress

Author: HuangJiang
Tutor: LiuLingJia
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: Model Effective prestressing Detect Power law Static method
CLC: U446.1
Type: Master's thesis
Year: 2008
Downloads: 18
Quote: 1
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Abstract


At present , China 's highways have been built on a lot of prestressed concrete bridge . Many bridges in put into operation as a result of various diseases due to lack of valid values ??for prestressed , such as mid-span deflection of the main beam is too large , the cracking of concrete box girder . Therefore , to carry out to RMS detection method of the existing bridge prestressed research has important practical significance and practical value . Ministry of western issues , a major component of the span concrete bridge prestressed detection technology \an effective way , a large proportion of beam model tendon tension test method : static method and its dynamic method . Model test data were analyzed in order to get the relationship that exists between the measured value and the specified value . Due to the dynamic method and static method in the operation of error , and environmental factors , so there is some difference between them . Power in the case of low tension level influenced by environmental factors , the measured value is unstable , so the measured values ??in the model test access static method test value . The specification values ??are based on the specification proceeds , in tension control known case , steel beam along the longitudinal tension value of each measuring point . Ground beam model test data analysis , found that the specification proceeds along the steel beam longitudinal tension conservative side , the measured value is larger than the standard value , and there is a certain distribution law . Based on the measured values ??of the model test specification values ??comparative analysis to find the relationship that exists between the two , verify that the proposed three scenarios . In the real bridge design and construction , the anchor control based on the actual situation appropriately reduced , to prevent big Tension bridge adverse factors .

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge test observations with the test > Bridge test equipment
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