【文章內(nèi)容簡介】 ( )。 專業(yè)好文檔 第 26 頁 共 32 頁 A． 2 B． 3 C． 4 D． 5 3．靜定結(jié)構(gòu)產(chǎn)生內(nèi)力的原因有（ ）。 A． 荷載作用 B． 支座位移 C． 溫度變化 D． 制造誤差 4．超靜定結(jié)構(gòu)產(chǎn)生內(nèi)力的原因有 ( )。 A．荷載作用與溫度變化 B．支座位移 C．制造誤差 D． 以上四 種原因 5．結(jié)構(gòu)位移計(jì)算公式利用什么原理推導(dǎo)的 ( )。 A．位移互等原理 B．虛位移原理 C．虛功原理 D．反力互等原理 6．機(jī)動(dòng)法作靜定梁影響線的理論依據(jù)是 ( )。 A．虛力原理 B．虛位移原理 C．位移互等定理 D．疊加原理 7．在圖示結(jié)構(gòu)中，為使體系自振頻率 ? 增大，可以 ( )。 A．增大 PF B．增大 m C．增大 EI D．增大 l 8．圖示簡支梁中間截面的彎矩為 ( )。 A． 82ql B． 42ql C． 22ql D． 2ql 9．一般 情況下結(jié)點(diǎn)的不平衡力矩等于 ( )。 A．固端彎矩 B．傳遞彎矩 專業(yè)好文檔 第 27 頁 共 32 頁 C．分配彎矩 D．附加剛臂中的約束反力矩 10．超靜定結(jié)構(gòu)的超靜定次數(shù)等于結(jié)構(gòu)中 ( )。 A．約束的數(shù)目 B．多余約束的數(shù)目 C．結(jié)點(diǎn)數(shù) D．桿件數(shù) 三（ 10分） 作圖示靜定梁的彎矩圖。 四、（ 16分） 用力 法計(jì)算圖示結(jié)構(gòu)，作彎矩圖。 EI=常數(shù)。 五 、（ 14分） 用位移法計(jì)算圖示剛架，列出典型方程，求出系數(shù)項(xiàng)及自由項(xiàng)。 EI=常數(shù)。 參考答案 一、判斷題（以 √ 表示正確，以表示錯(cuò)誤 。 每小題 3 分，共 30 分） 1． 2． √ 3． 4． √ 5． √ 6． 7． √ 8． 9． 10． 二、 單項(xiàng) 選擇題（ 每小題 3 分，共 30 分。在所列備選項(xiàng)中，選一項(xiàng)正確的或最好的作為答案，將選專業(yè)好文檔 第 28 頁 共 32 頁 項(xiàng)號(hào)填入各題的括號(hào)中 ） 1． A 2． B 3． A 4． D 5． C 6． B 7． C 8． A 9． D 10． B 三（ 10分） 四、（ 16分） 解：（ 1）一次超靜定，基本體系和基本未知量，如圖 (a)所示。 （ 2）列力法 方程 11111 ???? px ? （ 3）作 1M 圖，見圖 (b) 作 PM 圖，見圖 (c) （ 4）計(jì)算 11? 、 P1? EIEIEIdEIM s 325 6444138442112111 ??????????? ??? EIEIdEIMM sPP 311 60422021111 ????????? ??? )(321451 kNx ? （ 5）作 M 圖 專業(yè)好文檔 第 29 頁 共 32 頁 五 、（ 14分） 解： 4EIi? 典型方程 01111 ??? PFk ik 1111? mkNF P ??? 51 專業(yè)好文檔 第 30 頁 共 32 頁 If we don39。t do that it will go on and go on. We have to stop it。 we need the courage to do it. His ments came hours after Fifa vicepresident Jeffrey Webb also in London for the FA39。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 discrimination. This is one of the villains we have today in our game. But it is only with harsh sanctions that racism and discrimination can be washed out of football. The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s antiracism taskforce, is in London for the Football Association39。s 150th anniversary celebrations and will attend City39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。s 21 win. Michel Platini, president of European football39。s governing body, has also ordered an immediate investigation into the referee39。s actions. CSKA said they were surprised and disappointed by Toure39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Baumgartner the disappointing news: Mission aborted. The supersonic descent could happen as early as Sunda. The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. The balloon will slowly drift to the edge of space at 120,000 feet ( 專業(yè)好文檔 第 31 頁 共 32 頁 Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。s not needed. Instead, he plans to deploy his 270squarefoot (25squaremeter) main chute at an altitude of around 5,000 feet (1,524 meters). In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds. Even if everything goes as planned,