Reliability Analysis and Numerical Simulation on Time-dependence of RC Free Beams
Load effects and resistance are supposed to constant in traditional reliability theory. In fact, load effects and resistances change with time because some influent factors of structures change in long working life. Thus, only structures are safe at every moment in working life are structures safe. A synthetical method of qualitative and quantitative analysis is proposed in this paper to study the time-dependence problem of a RC free beam. Firstly, the timedependence character of a free beam is simulated by ANSYS program. Then, a time-dependent reliability model of the free beam is established, and a program is edited to get values of resistance and index of reliability in different years, thus, the timedependent reliability of the RC free beam is assessed. The results showed that the value of the resistance decreased 20 percent and the reliability index cut half down after 50 years, so timedependence should be considered to achieve correct results when the reliability of in-service structures is estimated and new structures are designed.
Time-dependence RC free beam Numerical simulation Reliability analysis ANSYS
Wenhui Tan Yonggang Pei Da Li
School of Civil and Environmental Engineering, University of Science and Technology Beijing,100083, Center of Water Resources & Hydroelectric Technology Beijing, 100073 Beijing, China
国际会议
上海
英文
823-826
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）