RELIABILITY INDEX-BASED DESIGN FOR BUILDING STRUCTURE

When designing a strurcture according to partial factor specified in the current standard,there are quite great differences between reliability index corresponding to each load effect ratio and target reliability index,and it does not establish the relationships between partial factors and target reliability index.To solve these two problems,the method of determining partial factor was developed in accordance with design value method.The values of sensitive coefficients were optimized and analyzed,thereby establishing the relationships between partial factors and the ratios of the nominal value of the variable load to that of permanent load.The research shows the error of the reliability index obtained and target reliability index reached the minimum as the sensitive coefficients were represented as functions of the ratios of the nominal value of the variable load to that of permanent load;the coefficient of combination of each variable load can be taken as a constant.