【正文】 C: 以長(zhǎng)期效應(yīng)組合進(jìn)行（用于正常使用極限狀態(tài)）驗(yàn)算時(shí)：最大正彎矩組合下局部承載力時(shí)：（1）1節(jié)點(diǎn)處：1節(jié)點(diǎn)：彎矩= 軸力=28750KN2節(jié)點(diǎn)：彎矩= 軸力=28750KN1. =*295/*=2. =1000(1++)= 3.= 18250/49410= =+*+*^2== =*==*== =1 4.=49410/28750= = =5. 1節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**==28750KN1節(jié)點(diǎn)處局部承載力滿足要求（2）20節(jié)點(diǎn)處：20節(jié)點(diǎn)：彎矩= 軸力=18910KN19節(jié)點(diǎn)：彎矩= 軸力=11260KN1. =*295/*=2. =1000(1++)= 3.=+*+*^2== =*==*== =1 4. =1157/11260= m = =1/(1+*)=5. 20節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=N=18910KN*Ag*f=**295*1000=22節(jié) 點(diǎn)處局部承載力滿足要求（3）39節(jié)點(diǎn)處：38節(jié)點(diǎn)：彎矩= 軸力=68230KN39節(jié)點(diǎn)：彎矩= 軸力=73260KN1.=*295/*=2.=1000(1++)=3.=4891/5509= =+*+*^2== =*==*== =14.=5509/73260= = =1/(1+*)=5. 39節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**= 7326039節(jié)點(diǎn)處局部承載力滿足要求（4）58節(jié)點(diǎn)處：58節(jié)點(diǎn)：彎矩= 軸力=18130KN59節(jié)點(diǎn)：彎矩= 軸力=26630KN1.=*295/*=2.=1000(1++)=3.=1384/2148= =+*+*^2== =*==*== =1 4.=2148/18130= = =1/(1+*)=5. 58節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=1322791813058節(jié)點(diǎn)處局部承載力滿足要求（5）77節(jié)點(diǎn)處：76節(jié)點(diǎn)：彎矩= 軸力=16550KN77節(jié)點(diǎn)：彎矩= 軸力=16510KN1.=*295/*=2.=1000(1++)=3.=12520/28240= =+*+*^2== =*==*== =1 4.=28240/16550= = =5. 77節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=1651077節(jié)點(diǎn)處局部承載力滿足要求 （6）78節(jié)點(diǎn)處：78節(jié)點(diǎn)：彎矩= 軸力=60060KN79節(jié)點(diǎn)：彎矩= 軸力=64000KN1. =*295/*=2. =1000(1++)= 3.=16500/70380= =+*+*^2== =*==*== =1 4. =70380/64000= = =5. 78節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=N=60060KN*Ag*f=**295*1000= 78節(jié)點(diǎn)處局部承載力滿足要求（7）97節(jié)點(diǎn)處：96節(jié)點(diǎn)：彎矩= 軸力=38600KN97節(jié)點(diǎn)：彎矩= 軸力=38480KN1. =*295/*=2. =1000(1++)= 3.=360/1954= =+*+*^2== =*= =*= = =1 4. =1954/38600= = =1/(1+*)=5. 97節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=38480 97節(jié)點(diǎn)處局部承載力滿足要求（8）116節(jié)點(diǎn)處：115節(jié)點(diǎn)：彎矩= 軸力=54780KN116節(jié)點(diǎn)：彎矩= 軸力=45770KN1. =*295/*=2. =1000(1++)= 3.=4887/5524= =+*+*^2== =*= =*= =
。（II）以最小負(fù)彎矩組合時(shí)，最不利位置在20,97節(jié)點(diǎn)處（1）20節(jié)點(diǎn)處： 19節(jié)點(diǎn)：彎矩=2022kN .M 軸力=23920KN 20節(jié)點(diǎn)：彎矩= .M 軸力=16230KN1. =*295/*=2. =1000(1++)= 3. = =+*+*^2= = =*= =*= = =1 4. =2022/23920= = =1/(1+*)=5. 20節(jié)點(diǎn)處的承載力設(shè)計(jì)值為 =1**= N=23920KN*Ag*f=**295*1000= 20節(jié)點(diǎn)處局部承載力滿足要求（2）97節(jié)點(diǎn)處： 96節(jié)點(diǎn)：彎矩=2633kN .M 軸力=51980KN 97節(jié)點(diǎn)：彎矩= .M 軸力=51990KN1. =*295/*=2. =1000(1++)= 3. =+*+*^2= = =*= =*= = =1 4. =2633/51980= = =1/(1+*)=5. 97節(jié)點(diǎn)處的承載力設(shè)計(jì)值=1**=161297 51990 97節(jié)點(diǎn)處局部承載力滿足要求 所以在驗(yàn)算節(jié)點(diǎn)處局部承載力是否滿足要求時(shí)，同時(shí)取同桿件上的另一個(gè)點(diǎn)在最不利狀態(tài)下的組合，比單獨(dú)節(jié)點(diǎn)最不利時(shí)更保守（例如取的是20節(jié)點(diǎn)和19節(jié)點(diǎn)同時(shí)在最不利狀態(tài)的組合，這比20節(jié)點(diǎn)最不利時(shí)，19節(jié)點(diǎn)沒達(dá)到最不利時(shí)更保守）因?yàn)樽畲筘?fù)彎矩組合時(shí)，各節(jié)點(diǎn)中，20,97節(jié)點(diǎn)是最不利的，結(jié)合對(duì)最大正彎矩組合的驗(yàn)算，可以推得最不利節(jié)點(diǎn)20,97節(jié)點(diǎn)局部承載力滿足要求，所以可得其它節(jié)點(diǎn)1節(jié)點(diǎn)、39節(jié)點(diǎn)、58節(jié)點(diǎn)、77節(jié)點(diǎn)、78節(jié)點(diǎn),116節(jié)點(diǎn),135節(jié)點(diǎn),154節(jié)點(diǎn)局部承載力也應(yīng)該滿足要求。整體承載力驗(yàn)算：（1）=*2= *= M1=17060+15400=32460 M2=91780+85070=176850 N1=2956068420 =38860kN N2=12670+52660=65330kN= 32460/176850 =所以=+ +*^2==*=（2）=(+^2*)*2==2*(+*)==*(^^2)/cos(40)====（4） =+(1+)==32460/38860===1/(1+2*)=（4）=2*=（5） 整體承載力設(shè)計(jì)值=**== =38860kN 基本組合下整體承載力滿足要求。（用于承載能力極限狀態(tài)）驗(yàn)算，最大正彎矩值下局部承載力時(shí)：（1）1節(jié)點(diǎn)處：1節(jié)點(diǎn)：彎矩= 軸力=38160KN2節(jié)點(diǎn)：彎矩= 軸力=38360KN1. =*295/*=2. =1000(1++)=3. = 24170/65250= =+*+*^2== =*==*== =14. =24170/38160= = =1/(1+*)=5. 1節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**==38160KN1節(jié)點(diǎn)處局部承載力滿足要求（2）20節(jié)點(diǎn)處：20節(jié)點(diǎn)：彎矩= 軸力=12010KN19節(jié)點(diǎn)：彎矩= 軸力=4526KN1. =*295/*=2. =1000(1++)= 3.= =+*+*^2== =*==*== =1 4. =1132/12010= = =1/(1+*)=5. 20節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=N=12010KN*Ag*f=**295*1000=20節(jié) 點(diǎn)處局部承載力滿足要求（3）39節(jié)點(diǎn)處：38節(jié)點(diǎn)：彎矩= 軸力=97320KN39節(jié)點(diǎn)：彎矩= 軸力=10250KN1.=*295/*=2.=1000(1++)=3.=7243/8625= =+*+*^2== =*==*== =14.=8625/10250= = =5. 39節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=1025039節(jié)點(diǎn)處局部承載力滿足要求（4）58節(jié)點(diǎn)處：58節(jié)點(diǎn)：彎矩= 軸力=31540KN59節(jié)點(diǎn)：彎矩= 軸力=39980KN1.=*295/*=2.=1000(1++)=3.=3138/3669= =+*+*^2== =*==*== =1 4.=3669/31540= = =1/(1+*)=5. 58節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=3154058節(jié)點(diǎn)處局部承載力滿足要求（5）77節(jié)點(diǎn)處：76節(jié)點(diǎn)：彎矩= 軸力=21990KN77節(jié)點(diǎn)：彎矩= 軸力=21810KN1.=*295/*=2.=1000(1++)=3.=16470/37070= =+*+*^2== =*==*== =1 4.=37070/21990= = =5. 77節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=2181077節(jié)點(diǎn)處局部承載力滿足要求（6）78節(jié)點(diǎn)處：78節(jié)點(diǎn)：彎矩= 軸力=75030KN79節(jié)點(diǎn)：彎矩= 軸力=83730KN1. =*295/*=2. =1000(1++)= 3.=21850/93040= =+*+*^2== =*==*== =1 4. =93040/83730= = =5. 78節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=N=75030KN*Ag*f=**295*1000=78節(jié) 點(diǎn)處局部承載力滿足要求（7）97節(jié)點(diǎn)處：96節(jié)點(diǎn)：彎矩= 軸力=36360KN97節(jié)點(diǎn)：彎矩= 軸力=36020KN1. =*295/*=2. =1000(1++)= 3.=1007/1607= =+*+*^2== =*= =*= = =1 4. =1607/36020= = =1/(1+*)=5. 97節(jié)點(diǎn)處的承載力設(shè)計(jì)值為=1**=16438436020 97節(jié)點(diǎn)處局部承載力滿足要求（8）116節(jié)點(diǎn)處：115節(jié)點(diǎn)：彎矩= 軸力=76050KN116節(jié)點(diǎn)：彎矩= 軸力=66300KN1. =*295/*=2. =1000(1++)= 3.=7759/8597= =+*+*^2== =*= =*= = =1 4. =8597/6630= = =5. 116節(jié)點(diǎn)處的承載力設(shè)計(jì)值為 =1**= N=66300KN*Ag*f=**295*1000= 116節(jié)點(diǎn)點(diǎn)處局部承載力滿足要求（9）135節(jié)點(diǎn)處：135節(jié)點(diǎn)：彎矩= 軸力=5291KN136節(jié)點(diǎn)：彎矩= 軸力=2486KN1. =*295/*=2. =1000(1++)= 3. =1857/4266= =+*+*^2= = =*= =*= = =1 4. =4266/5291= = =5. 135節(jié)點(diǎn)處的承載力設(shè)計(jì)值為 =1**= N=5291KN*Ag*f=**295*1000= 135節(jié)點(diǎn)點(diǎn)處局部承載力滿足要求（10）154節(jié)點(diǎn)處：153節(jié)點(diǎn)：彎矩= 軸力=29140KN154節(jié)點(diǎn)：彎矩= 軸力=34850KN1. =*295/*=2. =1000(1++)= 3. =14800/55950= =+*+*^2= = =*= =*= = =1 4. =55950/29140= = =5. 154節(jié)點(diǎn)處的承載力設(shè)計(jì)值為 =1**= 34850154節(jié) 點(diǎn)點(diǎn)處局部承載力滿足要求整體承載力驗(yàn)算：（1）=*2= *= M1=24170+21850=46020 M2=16470+14800=31270 N1=38160+75030=113190kN N2=21810+34850=56660kN= 31270/46020 = 所以=+ +*^2==*=（2）=(+^2*)*2==2*(+*)==*(^^2)/cos(40)====（3） =+(1+)==46020/113190===1/(1