20xx年中央電大土木工程力學(xué)本期末復(fù)習(xí)資料考試小抄-文庫(kù)吧資料
2024-10-18 09:10本頁(yè)面
【正文】 le mills, chemical plants and machine manufacturing factories were set up along the creek in the 1920s. They brought industrialization but also pollution. From the 1930s the creek could no longer be used as a source for tap water, and no living fish or shrimp could be found. Suzhou Creek in my memory is dark and smelly. I used to g o to the riverbank to watch the sewage disposal running out from the chemical plants when I was a little girl. We didn’t know it was pollution. We thought it was a red waterfall, says Huang Qi, a 57yearold Shanghai resident. So the residential houses along the creek were unpopular, and only migrants with low ines would live in that area, she says. However, things have changed. The plants were closed and turned into riverside parks and the apartments in t he new highrises, especially those facing the creek, are much sought after. East China University of Political Science and Law This is the famous former Saint John’s University, China’s firstever modern institution of higher education established by missionaries from the United States in 1879. The buildings bine Chinese and Western elements. Address: 1575 Wanhangdu Road, Changning district The old residential area After you leave the university from its east gate you will enter a shabby neighborhood that retains its original look. The alleys are narrow and the houses are overcrowded. Some things have not changed for many generations, such as raising chickens at home. Address: West Guangfu Road Moganshan Road This is an artsy street that has bee very popular among artists and fashionistas in recent years. Graffiti covers the walls on the winding street, where you can find a cluster of art galleries and creative industry offices. Sihang Warehouse Four banks jointly funded the construction of this warehouse, so it is named sihang, or four banks. The warehouse, built in 1 931, was used for the storage of food, firstaid supplies and ammunition during the years of war. The building, which is also a masterpiece left by the Hungarian architect Laszlo Hudec in the 1930s, has been recently transformed into a center of creative industry workshops. Address: 1 Guangfu Road, Zhabei district 。 解： 基本體系及未知量如上中 4EIi? 典型方程 01111 ??? PFk ik 1111? mkNFP ??? 51 ，列出典型方程，求出系數(shù)項(xiàng)及自由項(xiàng)。 第 9 頁(yè) 共 10 頁(yè) 解： 基本體系及未知量如右上圖 典型方程 01111 ??? PFk 4EIi? ih 811? mkNFP .51 ?? ，列出典型方程，求出系數(shù)項(xiàng)及自由項(xiàng)。（ 14 分） 解： lEIi? 典型方程 01111 ??? PFk ik 1111? 8/31 lFF PP ?? ，列出典型方程，求出系數(shù)項(xiàng)及自由項(xiàng)。 基本體系及未知量如右上圖所示lEIi 2? 典型方程 01111 ??? PFk ik 811? lFF PP ??1 3． 用位移法計(jì)算圖示 連續(xù)梁 ， 求 出 系數(shù)項(xiàng) 和 自由項(xiàng)。 第 8 頁(yè) 共 10 頁(yè) 解：基本體系如右上圖所示 典型方程??? ????? ????? 002222121 1212111 PPFkk Fkk ik 811 ik 1222? ikk 22112 ?? （下左） 圖示剛架，列出典型方程，求出系數(shù)項(xiàng)及自由項(xiàng)。 作彎矩圖如圖 (f)所示 （右上圖） ，列出典型方程，求出剛度系數(shù)項(xiàng)。 （右上圖） 圖 (a)簡(jiǎn)化半剛架如圖 (c)所示。 桿件 EI 為 常數(shù)。 解：（ 1）一次超靜定，基本體系和基本未知量，如圖 上中 所示。 解： 基本體系及未知量如右上 典型方程 011111 ????? Px? ，作彎矩圖。 解：利用對(duì)稱性結(jié)構(gòu)簡(jiǎn)化為如圖 （右上中） ： 第 7 頁(yè) 共 10 頁(yè) 作出一半剛架彎矩圖，然后作出最后整個(gè)體系的彎矩圖 （右上邊） 。 01111 ??? PX? EIlllllllEIdEIM s 34)3221(1 32111 ??????????? ? ?? ? ? ?????????? EIlFllFlEIdEIMM PPsPP 822211 31 3231 PFx? ，并作彎矩圖。 EI=常數(shù)。 解 :基本體系及未知量如圖 ( a )（右上圖） 所示 。 第 6 頁(yè) 共 10 頁(yè) (解答如右 ) ，并作彎矩圖。 解答如右） 四、（ 16分） 。 （解答如右） 。 B. 支座位移 C. 溫度變化 D. 以上原因都可以 三 、作圖題 （ 第 21題 10 分 ，第 22 題 16 分，第 23 題 14分，共 40分 ） 1． 作圖示靜定 結(jié)構(gòu) 的彎矩圖 。 A．
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