1005 =0.00568 bh1000×117 B E, A,h. 1.15+0.2+6aEp 2×103×1005×177 5.79×102N.mm 1.15×0.574+0.2+6×667×0.00568 (4)求长期刚度B8 M B, M(⊙-1)+M 38.25×10 ×579×10 12 3825×10×(2-1)+3825×10 2.9×102Nmm20 1005 0.00568 1000 117 A s bh  = = =  2 0 5 2 12 2 1.15 0.2 6 2 10 1005 177 5.79 10 N mm 1.15 0.574 0.2 6 6.67 0.00568 s s s E E A h B    = + +    = =    + +   （4）求长期刚度Bl ( ) 6 12 6 6 12 2 ( 1) 38.25 10 5.79 10 38.25 10 2 1 38.25 10 2.9 10 N mm s l s l s M B B M M  = − +  =     − +  =  目录