界限为随机过程的工程结构时变动力可靠度.pdf

＊ 张俊芝 李桂青 (　　330029)　　(　　430070) 　　　:, , ;。 , , 。 　　:　　　 TIME-DEPENDENT DYNAMIC RELIABILITY OF ENGINEERING STRUCTURES BASED ON STOCHASTIC PROCESS BOUNDS Zhang Junzhi (Department of Civil Engineering, Nanchang Water Re ource College 　Nanchang　330029) Li Guiqing (Wuhan Univer ity of Technology 　Wuhan　430070) Abstract :In the paper, a tocha tic proce bound model i prop ed for con idering the in tantaneou deterioration ba ed on tati tical characteri tic of the tructural time-dependent re i tance.Then, the ba ic formula for time-dependent dynamic reliability of a tructure con idering the tocha tic proce bound are propo ed.An efficient numerical method i propo ed for calculation of the fir t cro ing reliability of non-tationary proce linear combination.The re ult of an example howed, con idering the in tantaneou deterioration of tructural re i tance, that the reliability i reduced rapidly with the exten ion of la ting time of dynamic load . Keywords :time-dependent reliability 　non-tationary proce e 　tocha tic proce bound the fir t cro ing problem [2] 　　 :λ1 =R i -S , λ2 =Ri +S , , R i i 。 。, , λ1, , , -λ2 。 , P (S ≤λ Q=q )Z , (t )S λ, [1] 。Vanmarke Coroti , S , , [3] , 。, [2] ;[3]Vanmarke 。 。, , , ( , ), 。 () 。,