【正文】 土木工程力學(xué)（本）形成性考核冊作業(yè)一說明：本次作業(yè)對應(yīng)于平面體系的幾何組成分析和靜定結(jié)構(gòu)的受力分析，應(yīng)按相應(yīng)教學(xué)進(jìn)度完成。一、 選擇題（每小題2分，共20分）1．三剛片組成幾何不變體系的規(guī)則是（ B ）A 三鏈桿相聯(lián)，不平行也不相交于一點 B 三鉸兩兩相聯(lián)，三鉸不在一直線上C 三鉸三鏈桿相聯(lián)，桿不通過鉸 D 一鉸一鏈桿相聯(lián)，桿不過鉸2．在無多余約束的幾何不變體系上增加二元體后構(gòu)成（C）A 可變體系 B 瞬變體系C 無多余約束的幾何不變體系 D 有多余約束的幾何不變體系3．瞬變體系在一般荷載作用下，（C ）A產(chǎn)生很小的內(nèi)力 B不產(chǎn)生內(nèi)力C產(chǎn)生很大的內(nèi)力 D不存在靜力解答4．已知某體系的計算自由度W=3，則體系的（ D ）A自由度為3 B自由度等于0C 多余約束數(shù)等于3 D 多余約束數(shù)大于等于35．不能作為建筑結(jié)構(gòu)使用的是（ D ）A無多余約束的幾何不變體系 B有多余約束的幾何不變體系C 幾何不變體系 D幾何可變體系6．圖示桁架有幾根零桿（ D ）A 0 B 2C 4 D 67．下圖所示結(jié)構(gòu)的彎矩圖形狀應(yīng)為（ A ）8．圖示多跨靜定梁的基本部分是（ B）A AB部分 B BC部分C CD部分 D DE部分9．荷載作用下產(chǎn)生桁架位移的主要原因是（ A ）A 軸向變形 B 彎曲變形C 剪切變形 D 扭轉(zhuǎn)變形10．三鉸拱在集中力作用下其合理拱軸線形狀是（ D ）A 折線 B 圓弧C 雙曲線 D 拋物線二、 判斷題（每小題2分，共20分）1．多余約束是體系中不需要的約束。（ 180。 ）2．如果體系的計算自由度大于零，那么體系一定是幾何可變體系。（218。 ）3．兩根鏈桿的約束作用相當(dāng)于一個單鉸。（180。 ）4．一個體系是有n個自由度的幾何可變體系，那么加入n個約束后就成為無多余約束的幾何不變體系。（180。 ）5．兩剛片用三鏈桿相聯(lián)，且三鏈桿平行不等長，則構(gòu)成瞬變體系。 （218。 ）6．圖示兩個單跨梁，同跨度同荷載。但橫截面形狀不同，故其內(nèi)力也不相同。（218。 ）7．三鉸拱的矢高f越大，水平推力也越大。（180。 ）8．求桁架內(nèi)力時截面法所截取的隔離體包含兩個或兩個以上的結(jié)點。（218。 ）9．某荷載作用下桁架可能存在零桿，它不受內(nèi)力，因此在實際結(jié)構(gòu)中可以將其去掉。（ 180。 ）10．試判斷下列彎矩圖是否正確。（ 180。 ）三、 試對圖示平面體系進(jìn)行幾何組成分析。（每小題5分，共20分）１． ２． ３． ４． Opinions and suggestions on the party39。s mass line educational practiceAccording to the central and provincial, municipal unified deployment, according to municipal Party mittee about carrying out the party39。s mass line educational practice activity in the city39。s implementation opinions, the spirit of the party39。s mass line educational practice activities from 20** in January to 99 months, carried out at all levels of departments and directly affiliated institutions and grassroots party organizations. According to my actual County, the county to carry out the education practice put forward the following implementation , the overall requirementsCounty county education practice to the eighteen Party of eight, the spirit of the the third Plenary Session of the 18th CPC Central Committee as the guidance, conscientiously implement the spirit of general secretary Xi Jinping book series of important speech, earnestly implement the Central Committee really, opinions and advice , party implementing the guiding ideology of opinions to determine the objectives and requirements, step method, in accordance with the look in the mirror, dress up, wash bath, cure treatment, the general requirements of for the people pragmatic honest people as the theme, in carrying forward the spirit of Zhuanglang Zhuang, improve their work style, service to the masses of the people, the foundation of consolidating grassroots, promote transformation across efforts, to further implement the central eight regulations and The opposition party and government austerity waste regulations , double section provincial regulations, municipal provisions of the twelve plan and the implementation measures for on improving the work style of close ties with the masses law, highlight style building, carry out the whole wind spirit, resolutely oppose formalism, bureaucracy, hedonism and wasteful extravagance to solve the problems, Party members and cadres of the style and the masses of people strong, the Ministry of Party members and cadres to further improve their thinking and understanding, to further change the style of the wind, the masses to close, honest and pragmatic people honest image to further establish the foundation to further reinforce the basic level. Style of the building of the new results to promote the construction of a powerful force of the county and the ecological culture of the county and county educational practice activities of the unit is mainly: the county and below county departments under the organs, enterprises and institutions directly under the township, street, and munity, village, nonpublic economic organizations, social organizations and other grassroots organizations. Agencies and branches, each single unit, follow the rules on internal institutions. Educational pract