1、 15g7132 g16901g11934g4554g3374g12138g3374g5522g11444g5522g5619g1131g17828g2748g5522g5619g1131g5919g5719g11801g452 2g714g1912g8818g3374g708bg709g5522g5619g1405g13726g726g3zC = 0 5-4 g5852g14322g7857g2567g2251g2554g6234g19858g4714g4648g4018g3374g6256g12138g452g3374g1117g11444g4714g4648g2437g1405g1130
2、mmg452g8818g726g7857g114441g7131g6234g19858g1082Ag451Bg1108g9961g11444g8595g5316g2251g452 g1168g201685-4g3374 g16403g7261. g16849g12743g7857g114441g7131g6234g19858g1082g11444g5471g11801g726 3 1m1 10 N 1m+60N/m 1m 1030N m2M = = 2. g11934g4554g7857g114441g7131g6234g19858g1082Ag451Bg1108g9961g11444g859
3、5g5316g2251g726 Ag9961g726 2( )3363-3 -3150 10 m1030N m 20 10 m2 2.014 10 Pa 2.014MPa( )100 10 m 150 10 m12zAzM yI = = = g729 g6393g5316g2251 Bg9961g726 ( ) 630.150m1030N m 004m2 1.282 10 Pa 1.282MPa0.1m 0.15m12.zBzM yI = = = =(g2491g5316g2251) 5g7136g11801g5522g6234g19858g12720g7007g7857g4018g3374g
4、6256g12138g452g16901g16849g127431-1g6234g19858g1082ag9961g2748bg9961g11444g8595g5316g2251g2748g2103g5316g2251g452g38kN1A B10001200 10001.101504075bag201685-6g3374 g16403g726 1g714g88181-1g6234g19858g1082g11444g2202g2251g2748g5471g11801 0= BM g726 0182.2 =AyF g712 kN 1140=AyF g295 1-1g6234g19858g1082
5、g11444g2202g2251g2748g5471g11801g1130g726 kN 114011Q =F g712 mkN 114011 =M 2g714g88181-1g6234g19858g1082ag451bg1108g9961g11444g5316g2251 46123m 1009.2112 1015075 =zI MPa 03.6Pa1009.211040215010114063311 = = zaa IyM MPa 0.38Pa 1009.21107510240215040751011406393*11Q = = zza bISF MPa 93.12Pa1009.211021
6、5010114063311 = = zbb IyM 0=b g335g71310 Tg5522g6234g19858g19240g19185g7857g11444g17837g14759g2748g6234g19858g4714g4648g4018g3374g6256g12138g452g19240g19185g11444g6343g6393g16872g5316g2251 MPa30=+ g712g6343g2491g16872g5316g2251g1130 MPa160= g452g5154g11797g6234g19858g4649g5522g5619g17828zg11444g5919
7、g5719g11801g1130Iz=763cm4g712g1092 mmy 521 = g452g16901g7761g7784g7857g11444g5482g5334g452 g16403g726g11105g19849g2251g5283g16017g7145g5439g12347g8818g2090g7857g11444g7007g2557g2251g1130RA=2.5kNg712RB=10.5kNg1420g5471g11801g3374g4018g3374g6256g12138g452g7472g3927g8595g5471g11801g3416g6234g19858Cg108
8、2g712MC=2.5kNg1068mg452g7472g3927g17231g5471g11801g3416g6234g19858Bg1082g712MB=g7134kNg1068mg452 g201685-10g3374 T g5522g6234g19858g4649g1117g5719g17828g1085g4649g12320g712g2620g1072g6234g19858g1082g11444g7472g3927g6393g5316g2251g2748g2491g5316g2251g5286g1085g11560g12665g452g16849g12743g7472g3927g53
9、16g2251g7206g712g5316g1301y1g2748y2g2102g2139g1299g1941g5316g2251g16849g12743g1948g5439g452g3416g6234g19858Bg1082g712g5471g11801g7263g17231g11444g712g7472g3927g6393g5316g2251g2561g11087g1214g1082g17897g13640g2612g9961g708g3374cg709g712g1092 A B RA RB E C D1m 1m 1m F1=9kN F2=4kN E 120 20 20 80 x z y1
10、 y2 y Eg252Eg6234g19858 M y2 y1 g6234g19858C g6234g19858B g708ag709 g708bg709 g708cg709 2.5kNm 4kNm A B E C D1m 1m 1m F1=9kN F2=4kN E 120 20 20 80 z y1 y2 y Eg252Eg6234g19858 4 MPaMPaI yMzBt 302.271076310521048631 = + g7472g3927g2491g5316g2251g2561g11087g1214g1083g17897g13640g2612g9961g712g1092 2 21
11、140 52272 46 16052.Bc tzM y y MPa MPaI y = = = g3416g6234g19858Cg1082g712g15533g10086g5471g11801MCg11444g13581g4649g1644g4671g1214MBg712g1398MCg7263g8595g5471g11801g712g7472g3927g6393g5316g2251g2561g11087g1214g6234g19858g11444g1083g17897g13640g2612g9961g712g13884g17929g1227g9961g2144g1117g5719g17828
12、g11444g17421g12267g2468g8708g17843g17932g712g3344g13884g4705g7481g2591g14125g2561g11087g8708g6234g19858 B g17928g16305g3927g11444g6393g5316g2251 MPaMPaI yMzC 308.281076310)52140(105.28332 = + g1278g6256g5575g13571g7628g2591g1301g11579g2090g712g7184g16874g7263g7472g3927g6393g5316g2251g17928g7263g7472
13、g3927g2491g5316g2251g18221g7514g17333g17911g16872g11096g5316g2251g712g5482g5334g7569g1318g7263g9489g17379g11444g452 5-13 g11105No.10g2599g5141g4487g19154g2150g6208g11444ABDg7857g712g5142g12575Ag3892g1130g3370g4554g19232g19246g7007g5335g712Bg9961g3892g11096g19232g19246g1086g19154g2150g3382g6234g19858
14、g7542BCg17934g6613g712BCg7542g3416Cg3892g11096g19232g19246g5852g6450g452g5154g11797g3382g6234g19858g7542g11556g5556dg72920 mmg712g7857g2748g7542g11444g16872g11096g5316g2251g3447g1130 g729160 MPag712g16901g8818:g13571g7604g11444g16872g11096g3447g5171g17837g14759g19702g5334 q g452 g16403g726g11115g547
15、1g11801g3374g4018g3374g6256g12138g726 g4649g1214g7857g726 max 05.M q= maxmax6 6305160 10 49 10 1568 10 N/m=1568kN/m05 05.,. .M qW WWq = = = g4649g1214g7542g726 M(kN.m) x 0.4125 0.5 5 ( )Nmax 2 22-3 6234 4 225 20 10 160 10 2234 10 N/m=2234kN/m4 225 4 225.,. .BF F qA d ddq = = = = g6256g1301g13571g7604g11444g16872g2591g17837g14759g1130 1568kN/m.q =
