Analysis Of The Early Performance Of High Strength Concrete In Continuous Beam Bridge Construction Linear Control Effect

Concrete in the hardening process, the mechanical properties change with time in constant, in the design and construction process of engineering structure, parameters of concrete Engineer consider value is mainly based on the standard test results in standard curing condition on the statistical parameters, and in the actual engineering construction, due to the lack of consideration of concrete especially is the early effect of high performance concrete, in the construction process, the actual parameters of related parameters of concrete value deviation and theoretical parameter values, and these deviations will lead to practical structure stress and strain values and calculated deviation.In order to consider the deviation, on the basis of former studies, for high strength concrete early age elastic modulus and early strain, are measured and analyzed and the data changes over time. By the test of early age elastic modulus of concrete, analyzed the construction site conditions and natural conditions of the two kinds of indoor standard environment, gives two kinds of conditions of early age elastic modulus variation with time and the difference of strain; early also analyzed two kinds of different conditions of contrast, differences are given under different environmental conditions of strain; at the same time, through the field test, gives the concrete practice of early strain. The measured value and the test block test early values are compared and analyzed, further defined the early changes of strain of concrete, and analyze its influence factors, and then gives some suggestions on design and construction of concrete bridge.Using the above analysis results, this paper uses the analysis software of Midas/Civil, the maximum cantilever bridge construction stage and the two stage in the middle span closure stage, bridge linear variation analysis, results were compared with measured value analysis, determine the effect of the early performance of concrete in the construction process in the actual structure, put forward the relevant suggestions in the process of design with the construction of the project.The test research to achieve the desired requirements, to provide the reference data for the linear control of cantilever bridge construction effect analysis of follow-up study.