Reliability Evaluation On The Bearing Capacity Of Existing Bridge Based On The Analysis Of Operating Load

As the time increase, part of the servicing bridges appear deficiency of load carryingcapacity during operation。This is mainly due to two aspects：On one hand， It is earlyunderestimated on the development of highway bridge design，On the other hand，it is becausethat under many years using servicing bridges appear Various diseases that lead to thedeficiency of load carrying capacity。So，there are two aspects must be considered whenevaluate the load carrying capacity servicing bridges：the present situation of vehicle load andthe resistance degradation of structures。In order to understand the situation of the operation of vehicle load in our country inrecent years，as the same time Provide the basis for reliability assessment of servicingbridges，This paper based on the west traffic construction science and technology projects《The load of bridge design and the load of safety appraisal research》，This paper carry outthe research Based on vehicle load data provided by the relevant departments，Using the resultof load analysis， evaluate the reliability of carrying capacity of Bridges in service。At first the paper uses the method of mathematical statistics in jiangsu province vehicleload survey data for statistical analysis. Monte-Carlo method is used to simulate randomvehicle weight and random vehicle distance，use matlab programming simulate randomvehicle random fleet loader，and Choose three different types of common bridge vehicle loadeffect to calculate，set up operate load effect probability model in Jiangsu province；Secondly,from the bridge structure reliability theory, introduces there liability calculation methods andprocedures of the serving bridge system, analyze the bridge resistance and load effects andobtain the corresponding probability model，Analysis of factors that affect bridge structureresistance, summed up resistance attenuation model。Finally， based on Operating load，usingresistance attenuation model when calculate reliable indicator。calculate the during capacityreliability of a servicing T-shaped rigid frame bridge，through reliability indicators to assessthe bridge structure during capacity。This paper put forward the Grade of operation load levels of Bridge，Bridge duringcapacity reliability index， etc，this paper can provides the basic data and technical reservesfor the servicing bridge of Reliability， durability， whole life design and bridge operationload control。...