1、单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,第四章 超静定结构的解法,Methods of Analysis of Statically Indeterminate Structures,-,57.1,固定状态,:,二,.,多结点力矩分配,-,28.6,-,42.9,28.6,21.4,-9.2,-12.2,-6.1,6.1,6.1,3.5,2.6,1.8,1.8,.,放松结点,2(,结点,1,固定,):,放松结点,1(,结点,2,固定,):,-,57.1,-,28.6,-,42.9,28.6,21.4,-9.2,-12.2,-6.1,6.1,6.1
2、,3.5,2.6,1.8,1.8,.,分配传递,0.571,0.429,0.571,0.429,0,150,-100,100,0,0,-57.1,-42.9,0,-28.6,-12.2,-9.2,0,-6.1,3.5,2.6,0,1.8,-0.8,-1.0,0,140,-140,40.3,-40.3,0,140,40.3,M,作剪力图,求反力,140,Q,46,74,69.97,50.03,4.03,69.97,74,40.3,M,140,例:试求作图示连续梁的,M,图。,EI,等于常数,,l,1,=6 m,l,2,=5,m,,,P=1000kN,。(,只计算二轮),1721,1922,656
3、,595,3279,-2500,-1500,1500,-2500,-938 -562,1765 735,883,-735,-281,-469,-301,-301,-151,-151,94 57,47,29,107,44,54,-42,-42,-44,-1922,656,-656,-595,594,1721,-1721,-3279,超静定结构内力的概念分析,内力的概念分析:利用已知的力学概念及基本理论对内力、反力进行简便计算的方法。,超静定结构内力的概念分析除用到的静定结构的相,关概念及理论如:荷载与内力的微分关系;叠加法作内,力图;荷载的静力等效变换等外,还有独自特性。,1,、,利用传递系数的概念。,2,、,利用分配系数的概念,。,3,、利用等截面单跨超静定梁载常数表。,作业:力矩分配法计算图示连续梁,作弯矩图。,