江蘇科技大学jiangsu universityof sclence and technology载常数由荷载求固端内力（弯矩）三种基本杆件（1）两端固定的梁；（2）一端固定、另一端简支的梁；（3）一端固定、另一端滑动支承的梁。载常数：荷载作用下的固端弯矩和固端剪力。SchoolofCivilEngineeringandArchitecture
School of Civil Engine School of Civil Engineering and Architecture ring and Architecture ■载常数：荷载作用下的固端弯矩和固端剪力。 二．由荷载求固端内力（弯矩）——载常数 ■三种基本杆件 （1）两端固定的梁； （2）一端固定、另一端简支的梁； （3）一端固定、另一端滑动支承的梁
江蘇科技大学jiangsu university of sclence and technologyqti4MARFas12ILITITIXTLELBEdSiNFERAMEAS12q3qlMABFU13020qt7qtRMiuFou =2020两jFpabF,b((1+学)FOAAMAR端13RFpa'b周Fpu1+26M2-3FQRA12乐F,!FpMARFAR "B2Fp!FrMu=FOHA十号82ElaAtMAS-1EFon=0威AElaAtFaM-0MuArmt,-t2iSchool of Civil Engineering and Architecture
School of Civil Engine School of Civil Engineering and Architecture ring and Architecture
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School of Civil Engine School of Civil Engineering and Architecture ring and Architecture
江蘇科技大学qt"9MA=3FUAt Qf端固定另BYA12Fant-0HMA-6一端润动支承FylFra(21-a)MAR=1AFos= FpB21Fpa?Fgm=04Mr21FplFlou- FrF,1Fon"F.MuMH14AA2FBA=0TElaA!Mut.NFW-0hB6-815t2Flaa!Fan0MMIfLtt,-12School of Civil Engineering and Architecture
School of Civil Engine School of Civil Engineering and Architecture ring and Architecture
江蘇科技大学jiangsu university of sclence and technology如果等截面杆件既有已知荷载作用，又有已知的端点位移，根据叠加原理，杆端弯矩及剪力的一般公式为：MAB = 4i0, +2i0g-6i=+ MFAHMBa = 2i0, + 4i0g -6i=+ MBBA12i6i6i4+ FFH9HQAB12QAB112i6i61A+FFQBA12QBASchoolofCivil EngineeringandArchitecture
School of Civil Engine School of Civil Engineering and Architecture ring and Architecture 如果等截面杆件既有已知荷载作用，又有已知的端点 位移，根据叠加原理，杆端弯矩及剪力的一般公式为： F F 426 246 AB A B AB BA A B BA M i i iM l M i i iM l Q Q F Q 2 F Q 2 6 6 12 6 6 12 AB BA AB A B BA A B ii i F F l l l ii i F F l l l