Method for combination of actions based on stochastic processes in analysis of structural reliability
Xie Yaokui · Jianzhu jiegou xuebao · 2013
The analysis of structural reliability should be based on the probabilistic models describing directly the variety of actions and the method for combination of actions based on stochastic processes.However,the current method for combination of variable actions appearing with their frequent values or quasi-permanent values is actually the one based on random variables by maximum values expression,thus will lead to unreasonable results.According to stochastic model for variable action of equal time interval stationary binomial rectangular wave process,the interval samples corresponding to exceeded rates of frequent value and quasi-permanent value were determined,and the new concepts of frequent sequence values and quasi-permanent sequence values of variable actions were proposed.Consequently,the method for combination of actions based on stochastic process by sequence values expressions and models for reliability analysis were established.The proposed method is based on the theory of stochastic process,with clear and reasonable engineering concepts,thus can reflect accurately the ideas of actions combination,and derive reasonable results of reliability analysis,overcoming essentially the disadvantages of current method for combination of actions based on random variables.