【正文】
M P aW???? ? ? ? ??m a xm a x 3 3 2 . 2 8 9 1 0 0 0 0 . 4 8 [ ] 22 2 6 0 1 2 0QF M P a M P aA????? ? ? ???36m a x 23 0 1 0 0 .4 1 0 1 .7 51 2 0 2 0 01 2 0 2 0 06PZZFM M P aAW? ???? ? ? ? ? ? ? ???專業(yè)好文檔 解:長細比大,壓桿細長,臨屆壓力小,臨界力也小,桿件容易喪失穩(wěn)定 A桿最先失穩(wěn)! 電大建筑力學(xué)形成性考核答案力學(xué) 4 一、選擇題 二、填空題 桿軸為直線 位移 軸力 荷載 力(力偶) 反 反 位移 未知的結(jié)點角位移和未知的結(jié)點線位移 單跨超靜定梁的組合體 位移法 轉(zhuǎn)動 三,計 算題: 解:在 C 點加豎向單位力, AB 段和 BC 段坐標(biāo)如圖所示 AB 段 BC 段 :用圖乘法計算: ( 1)繪制實際荷載作用的彎矩圖 MP ( 2)作單位力作用下的彎矩圖 ( 3)橫梁中點的豎向位移為: ( 1) 解( 1)選取基本結(jié)構(gòu): ( 2) 建立典型方程: ( 3)計算系數(shù)和自由項: 繪制 圖和 Mp 圖 li??? a c b? ? ???21M ( 0 )82M ( 0 )22PPql x M x x lqx lM x x? ? ? ? ? ? ?? ? ? ? ? ? ?2/200411( ) ( ) ( ) ( )8 2 211 ()384llPCMM q lx x q xd x d x x d xE I E I E IqlEI? ? ? ? ? ? ???? ? ? ?1 1 1 2 1[ ( ) ( ) ]2 4 2 3 2 4 2 3()16PPPl l l lF l F lEIFlEI? ? ? ? ? ? ? ? ???11 1 1 0PX? ?? ?1M專業(yè)好文檔 ( 4)求多余未知力: ( 5) 作內(nèi)力圖: ( 2)解: 其基本未知量為剛結(jié)點 A的未知 角位移 Z1,剛結(jié)點 B的未知角位 移 Z2,剛結(jié)點 C 的未知角位移 Z3。t do that it will go on and go on. We have to stop it。s celebrations said he wanted to meet Ivory Coast international Toure to discuss his plaint. CSKA general director Roman Babaev says the matter has been exaggerated by the Ivorian and the British media. Blatter, 77, said: It has been decided by the Fifa congress that it is a nonsense for racism to be dealt with with fines. You can always find money from somebody to pay them. It is a nonsense to have matches played without spectators because it is against the spirit of football and against the visiting team. It is all nonsense. We can do something better to fight racism and disc