20xx年中央电大土木工程力学本期末复习资料考试小抄内容摘要:

EIllllEIdEIM s 332211 32111       EIlFlFllEIdEIMM PPsPP 421211 31 431 PFx ,并作弯矩图。 EI=常数。 解:基本体系及未知量如图 ( a )(右上) 所示。 01111  PX EIlllllllEIdEIM s 34)3221(1 32111       EIlFllFlEIdEIMM PPsPP 822211 31 3231 PFx ,并作弯矩图。 杆件 EI 为常数。 解:利用对称性结构简化为如图 (右上中) : 第 7 页 共 10 页 作出一半刚架弯矩图,然后作出最后整个体系的弯矩图 (右上边)。 , EI=常数。 解: 基本体系及未知量如右上 典型方程 011111  Px ,作弯矩图。 EI=常数。 解:( 1)一次超静定,基本体系和基本未知量,如图 上中 所示。 ( 2)列力法方程 11111  px ( 3)作 1M 图,见图 (b)作 PM 图,见图 (c) ( 4)计算 11 、 P1 EIEIEIdEIM s 3256444138442112111   EIEIdEIMM sPP 31 1 6 0422021111   )(321451 kNx  ( 5)作 M 图 (右上边) 2. 力法 解图示结构, 并 作弯矩 图。 杆件 EI 为 常数。 ( 16 分) 解:利用对称性荷载分组如图 (a) 、 (b)所示。 (右上图) 图 (a)简化半刚架如图 (c)所示。 半刚架弯矩图如图 (d)所示。 作弯矩图如图 (f)所示 (右上图) ,列出典型方程,求出刚度系数项。 EI=常数。 第 8 页 共 10 页 解:基本体系如右上图所示 典型方程   002222121 1212111 PPFkk Fkk ik 811 ik 1222 ikk 22112  (下左) 图示刚架,列出典型方程,求出系数项及自由项。 EI=常数。 基本体系及未知量如右上图所示lEIi 2 典型方程 01111  PFk ik 811 lFF PP 1 3. 用位移法计算图示 连续梁 , 求 出 系数项 和 自由项。 EI=常数。 ( 14 分) 解: lEIi 典型方程 01111  PFk ik 1111 8/31 lFF PP  ,列出典型方程,求出系数项及自由项。 EI=常数。 第 9 页 共 10 页 解: 基本体系及未知量如右上图 典型方程 01111  PFk 4EIi ih 811 mkNFP .51  ,列出典型方程,求出系数项及自由项。 EI=常数。 解: 基本体系及未知量如上中 4EIi 典型方程 01111  PFk ik 1111 mkNFP  51 ,列出典型方程,求出系数项及自由项。 解: 基本体系及未知量如右上 典型方程 01111  PFk 第 10 页 共 10 页 请您删除一下内容, O(∩_∩)O 谢谢。 2020 年中央电大期末复习考试小抄大全,电大期末考试必备小抄,电大考试必过小抄 Shanghai’s Suzhou Creek has witnessed much of the city’s history. Zhou Wenting travels this storied body of water and finds its most fascinating spots. Some lucky cities can boast a great body of water, like London with the river Thames and Paris with the river Seine. Shanghai is privileged enough to have two great bodies of water: Huangpu River and Suzhou River became famous when colonists established clusters of grand buildings on its banks on what became known as the bund. Today, the bund overlooks the breathtaking skyline of Lujiazui financial district. Shanghai’s other body of water, however, Suzhou Creek, has been somewhat overshadowed. Suzhou Creek links the inland cities of Jiangsu province with Shanghai. When the British colonists, who arrived in the city after it was opened as a mercial port in 1843 found they could reach Suzhou, Jiangsu province, via the creek, they named it Suzhou Creek. Thanks to its location, a large amount of cargo and travelers were transported via the creek before rail links were established. But after a century of being utilized as a waterway to transport goods and labor, the creek grew dark and smelly. Industrial factories were established along the banks. In the 1990s it became a key task of the city government to clean the creek. Suzhou Creek, which snakes 17 km from the iconic Waibaidu Bridge downtown to the outer ring road in west Shanghai, maps the changing periods of the city’s history, including the imprints of the concessions, the beginning of industrialization and the improvement in people’s living conditions. Where the Bund began Inbetween the shopping street of East Nanjing Road and the Bund, are a cluster of streets that give me the illusion that I am no longer in modern Shanghai. The streets are narrow and old。
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