[工學(xué)]結(jié)構(gòu)力學(xué)試題集_全面-資料下載頁
2025-01-08 20:09本頁面
【正文】 L2+2qL22 c o s αqL2qL2222qL90901 0 080601 0 01 0 0PaPa2m 2m 2m( 3 4 )( 3 3 )(32)( 3 1 )( 3 0)( 2 9 )qqaaaaaLqLL/2L/2qL3m30kN20kN/m3m3m 3m40kN1 0 k N / mP=40kN2m2m2maPaa 44 415 qa221 qa2822qa22qaqa2qa22qa2qa2PLPLPa22Pa2PaPa(40)(39)(38)(37)L(36)(35)三、簡支式剛架aaqq2aqa2a2qaa2qaqaaqq/2a/2qaaaa/2PLPPaaa/2a2Pa2Paqa227 qa4 45 (4 6)2 . 5 9 5 q7qL24qL24223qL345453904806906904P a334P a4P a2qa225qaqa22qa22qa22(4 5)(4 4)(4 3)(4 2)(4 1)3m4m4mqqLqLLL4 0 k N1 0 k N / m3m3m3m3m3m4 P aaaa 2aqaqaa2a2M = q aqa/2a/2a3 qa22 46 MM2Pa2PP2無彎矩N =P/ 222q L2q L2PL PL2qLqL 22(52)(53)(50)(51)(48)(47)aaaaMaa2aPPLLL1.5LLLLqLPPL2LLqLLMPa285qa22qa82qa8 8qa22qa8qqq8qa225qa8q q(49) 47 MM2Pa2PP2無彎矩N =P/ 222q L2q L2PL PL2qLqL22(52)(53)(50)(51)(48)(47)aaaaMaa2aPPLLL1.5LLLLqLPPL2LLqLLMPa2 48 PLMM/2M/2M/2Pa/25qa/29qa/2(58)(57)(56)(55)(54)LL/2 L/2PL/2L/2LML/2q=20kN/m50kN50kN2m4m4ma/2a/2Pa/2a/2a3a3a2aqqa2qaPa/2PLPLPL四、三鉸式剛架 49 22 q a / 32qa2q a / 2PL(65)(64)(63)(62)(61)(60)(59)qaaa aq1.5aaaM1.5aaaq1.5aaaaa1.5aq2aaaPLLq a / 22q a / 222q a / 2MMMMqa2qa2/8MMMM/82qaqa2/82 q a / 322 q a / 3222 q a / 3q a / 22PL2MM Mqa 50 M/43M/4M/2M/2M/2M/22q2q對稱23qa/82qa/82qa/23m(71)(70)(69)(68)(67)(66)aaaaL/2L/2L/2L/23m2m3m12kN2mq2q 2m2m2m2mqa/2a/2 a2aa5m3m60kNqa/22qa/823qa/82M/2M/2 M/2qq2q2q 51 2qa22qa2qa2qL/2PaPa/4Pa/4( 7 7 )( 7 6 )( 7 5 )( 7 4 )( 7 3 )( 7 2 )五、復(fù)雜剛架qa2a2aqa/2aaaqL/2L/2L/2qLLLLaaaPaP Pa/2a/2aaPaPaqL/822qL/322q a /8qa/222qaqa2 52 2q a / 82qaF pa /2PaaaaaFpa aaaqqaa 2a2aaqaqaaaaaP2 k Nq = 1 0 k N / m2m2m2m 2m 4m4m( 7 8)( 7 9)( 8 0)( 8 1)( 8 2)F pa /2對稱qa222 q a2q a / 23 q a24 P a6 P a4P 8 P a1 2 k N . m4 k N . m8 k N . m8 0 k N . m2 4 k N . m5 6 k N . m 53 Pa4PaPa2Pa2qa2 qa/22qa/42(86)(85)(83)2m2m2aaaaaa2aPqa/2aqaaa/210kN1mq=4kN/m1m2m2m(84)5kN5kN 5kN4X3m=12m3m8m 5kN10kN5kN10kN 54 P/2PPP/280 P3P80 60 30 70 10 40 30 2m2m2m2m2m2m2m2m2m 2m( 9 0)(89)(88)(87)P2m2m2m2m20 kN/m40 kN2m2m4m4m22PP2m4m4m2m10 kN/mm40 kN20 kN20 kN10 kN/m10 kN/m20 20 40 80 80 2P 55 MPa/2Pa/2Pa/2Pa/2Pa/2Pa/24P4PPL/22qL/223qL/2(95)(94)(93)(92)(91)aaaaaaaaPaaaaaP2m4m4m2m4m030030PPL/2L/2LLqLLLMMM4P4P4P4P4PPL/2M 56 M2P6P4P2PL3PLPL2Pa2m(100)(99)(98)(97)(96)aaaa/2a/2aPLLLLL10kN/m2mm2m50kN100kN2m 2m2mPaa a2aa60kN mm60kN10kN/m20kN2m2m2m 2m2mM4PL2Pa 57
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