等截面超静定杆的杆端弯矩和剪力.pdf

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1、等截面超静定杆的杆端弯矩和剪力编弯矩剪力梁的简图号MABMBAFQABFQBA4EI2EI6EIi6EIi1=4i=2i−=−6−=−622llllll6EIi6EIi12EIi12EIi2−=−6−=−6=12=12223232llllllll2FPab2−222FPa(l+2b)lFPabFPb(l+2a)−3lFl23Pll3−8FPlFPFPl−（当a=b=）82221212114−qlqlql−ql1212221212735−qlqlql−ql20302020b(3a−l)a(3b−l)6ab6ab6MM−M−M2233llll

2、3EI3EIi3EIi7=3i0−=−3−=−322lllll3EIi3EIi3EIi8−=−30=3=323232llllllFab(l+b)P−22222lFPb(3l−b)FPa(2l+b)−32l32l39−Fl0P16115lFP−FP（当a=b=）16162125310−ql0ql−ql888124111−ql0ql−ql1510107291112−ql0ql−ql1204040222222l−3b3(l−b)3(l−b)M−M−M2l202l32l313Ml（a

3、i00llFa(l+b)P2−FaP2l−2lFP3Fl15P0−8FPlFPl−（当a=b=）82121216−ql−qlql0361212117−ql−qlql082425212118−ql−qlql02482b−Mla−MMl19−002M−l2（当a=b=）2