Reliability Analysis Method Study Of The Large Diameter Reinforced Concrete Squat Silo Wall

Large diameter shallow silo is a silo type introduced and built in our country, and has been widely promote and applied in China because of its outstanding advantages. After years of development, the relevant calculation and design theory have been promoted, and the relative mature theory and design method are introduced with principles. Although a lot of research work has been done by many scholars on silo design theory, it still needs to be further researched and improved.This article adopts probability statistics and reliability theory to perform summary and analysis over the probability characteristics on the lateral pressure of silos, while normalizing the actual lateral pressure of silos by introducing dimensionless random variables statistics ratio of test data to design data. By performing statistical analysis over the factors of mean value, deviation and variation coefficient ratio of test data to design data, probability distributions of lateral pressure and its mean value, deviation and variation coefficient have also been arrived. Resistance uncertainty of reinforced concrete(RC) component for silos has also been analyzed. With the usage of design value formula of hoop force generated by the lateral pressure of grains on the walls of circular silos, functions of load bearing capacity at extreme conditions can be established. On the basis of research above, by taking the No. 29 shallow silo in Henan State Grain Reserve as an engineering example, verifications on the reliable strength of this silo with the use of first-order second-moment(FOSM) method have been performed. Results show that reliability requirement of large-diameter RC shallow silo is satisfied.