qe= Apg qn=A2+Am=A/2(1+ B1 静载 动载:加速度为a上升 q M q d max st max 8 A pg st max d max st max 8 8 5.l q 5Apgl 5A g st max 384E384EI max 384E gq A g st =  FAy FBy 静载 (1 ) g a q A g A a A g st =  +  =  + FdAy 动载：加速度为a上升 8 2 max q l M st st = 8 2 max q l M d d = W A gl W M st st 8 2 max max   = = (1 ) 8 2 max g a W A gl d = +   EI A gl EI q l st st 384 5 384 5 4 4 max   = = (1 ) 384 5 4 max g a EI A gl d = +  