Curved Continuous Rigid-Frame Bridge Reliability Analysis On Response Surface Method

Curved continuous rigid frame bridge has been widely applied for its adaptability to the highway route as well as beautiful appearance At the same time,The changing of internal force and deformation is caused by many uncertainty factors,so the construction supervision in the process of construction must be carried out Based on the reliability theory, the lateral displacement of curve continuous rigid frame bridge carried out reliability analysis during the construction.To get the error value in the lateral displacement of different construction stage,The results of the sensitivity analysis of the reliability parameters can determine the greatest impact on the structural factors.Based on the No.1 Bridge on Gulin River, the.reliability of its construction was analyzed, and the specific contents are as follows:Established finite element model of the No.1 Bridge on Gulin River,using the response surface method to get the function of the implicit function, to lateral displacement of the bridge during the construction of reliability are analyzed.And the results showed that under the different construction stages, thereliability and failure probability of the lateral displacement for the key sections can be calculated with the change of lateral displacement allowing different values, and hence the allowable errors of the construction phase were determined. And the exceeding of the measured lateral displacement error over the allowable error value illustrated that there were problems about construction quality or construction monitoring, and quality control should be strengthened.. The sensitivity of each parameter’s reliability was analysed,The results showed that the effect size of lateral displacement of curved continuous rigid frame bridge was obtained in the following orders: the concrete density, prestressed tension values, the elastic modulus of concrete and twisted steel elastic modulus. It also indicated that the results analysis of parameters’sensitivity provides reference value to parameter identification and linear control.