Time-Dependent Reliability Assessment Methods Of Theexisting Concrete Beam Bridge Based On Long-Term Monitoring Data

Reliability of the change at the existing concrete bridge has become a hot topic in the international field of structural engineering extensively studied,especially with the widespread use of the world under the bridge real-time health monitoring system in the background,when carried out in a structured variable reliability theory,select the appropriate method of analysis will study when and bridge health monitoring system dependent reliability theory com bines the great theo retical significance and socio-economic benefits.Objective To carry out this type of research is to bridge real-time monitoring data can be transfor med into m ass for bridge maintenance,dismantling scientific basis f or decision-making becomes reliability index f or this article for the small concrete simply supported beam bridge span features carry based on the work Dependent reliability assessm ent of long-term m onitoring data in the existing concrete beam bridge,the main contents are as follows:1.Describes the current reliability of the basic theory and common calculation methods,and analyzes the advantages and di sadvantages of such a scope and second order moment method and Monte Carlo m ethod,based on this specification also describes the reliability of the re spective target reliability index an d the lowest reliability reliable indicators.2.We analyzed considering the performance degradation of the material are two ways to calculate statistical parameters of the corresponding variable resistance that is dependent resistance error propagation probab ility distribution types and associated statistical parameters,and summarizes the current impact resistance attenuation factors of the m athematical model,in troduced at the sam e time theory and Monte Carlo sampling.3.Based on reliability for health m onitoring data analysis of this topic,the paper with the election of a suitable computing system based on r eliable indicators monitoring data through space simply supporte d beam bridge corrosion stiffness,the upper structure to m onitor strain Backcalculation into bridge Real-time load internal force effects.4.By engineering example,obtained ba sed bridge m onitoring data becom es a reliable indicator of the use of JC method and Monte Carlo im portance sampling method.Calculate the rem aining service life of the bridge at the time of use of the minimum target reliability index derived in principle on the basis of varying reliability index.5.Finally,the use of Fortran language prep ared to consider resistance when load effect visualization reliability ind ex calculation program denatured and analyzed the applicability of the p rogram of each m odule,and the prog ram should be extended capabilities direction.