電大土木工程力學(xué)(本)形成性考核冊(cè)作業(yè)答案-wenkub
2023-06-20 21:34:14 本頁(yè)面
【正文】 ess of the use of brand, brand value, brand acquisition performance, enhance the petitive strength. Concentrated manpower, careful planning, packaging and publicity of a number of unique, market influence and coverage of the brand, the implementation of key breakthroughs, to enhance the petitive strength, walking business road the petition of alienation and characteristics, the pursuit of stability and development of the market.(four) to promote the integration of resources. To further broaden their horizons, effective integration of resources within the group, the city resources, other industries and regional resources, mutual trust, mutual benefit, seeking winwin principle, in the framework of national policies and regulations, strict inspection and argumentation, legal consultation, examination and approval procedures, strict regulation of economic activities, attract injection the social investment to the industry group, to achieve leveraging the development, ensure that the value of stateowned assets.(five) to strengthen the construction management personnel. Strengthen the management of education and training of cadres and workers of the existing business, firmly establish the concept of the market, enhance the sense of crisis to adapt to market petition, the sense of urgency, improve the ability to respond to market petition, improve management and operation of the market. At the same time, according to the need of industrial development, vigorously the introduction of highquality management management personnel, and strive to build a highquality professional management team, hard work, and promote the entire workforce knowledge structure, age structure, structure optimization and upgrading ability, enhance core petitiveness, adapt to the need of market petition.(six) seriously study the policy for policy. Serious research about social support the development of cultural undertakings in the country and the XX policy, especially the policy of industrial development, financial investment policy, financial policy and tax policy, and actively seek policy, projects and funds, enterprise and industry group mission to promote leapfrog 1．解：由二元體分析法原結(jié)構(gòu)是一個(gè)無(wú)多余約束的幾何不變體系。s mass line educational practice activity in the city39。（ 180。（218。（218。 ）5．兩剛片用三鏈桿相聯(lián)，且三鏈桿平行不等長(zhǎng)，則構(gòu)成瞬變體系。 ）3．兩根鏈桿的約束作用相當(dāng)于一個(gè)單鉸。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(diǎn) 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(guò)鉸 D 一鉸一鏈桿相聯(lián)，桿不過(guò)鉸2．在無(wú)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(wú)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(jì)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(wú)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。（180。 （218。 ）7．三鉸拱的矢高f越大，水平推力也越大。 ）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(shí)際結(jié)構(gòu)中可以將其去掉。 ）三、 試對(duì)圖示平面體系進(jìn)行幾何組成分析。s implementation opinions, the spirit of the party39。2．解：由二元體分析法原結(jié)構(gòu)是一個(gè)無(wú)多余約束的幾何不變體系。（每小題10分，共30分）１．ABCD1．作彎矩圖如下：ABCD56060()M圖（kN一、 選擇題（每小題2分，共10分）1．用力法計(jì)算超靜定結(jié)構(gòu)時(shí)，其基本未知量為（ D ）A 桿端彎矩 B 結(jié)點(diǎn)角位移 C 結(jié)點(diǎn)線位移 D 多余未知力2．力法方程中的系數(shù)代表基本體系在作用下產(chǎn)生的（ C ）A B C 方向的位移 D 方向的位移3．在力法方程的系數(shù)和自由項(xiàng)中（ B ）A 恒大于零 B 恒大于零 C 恒大于零 D 恒大于零4．下列哪一條不是圖乘法求位移的適用條件？（ D ）A直桿 B EI為常數(shù)C、至少有一個(gè)為直線形 D 、都必須是直線形5．下圖所示同一結(jié)構(gòu)在兩種不同荷載作用下，它們之間的關(guān)系是（ D ） A A點(diǎn)的水平位移相同 B C點(diǎn)的水平位移相同C C點(diǎn)的水平位移相同 D BC桿變形相同二、 判斷題（每小題2分，共10分）1．靜定結(jié)構(gòu)由于支座移動(dòng)引起的位移與剛度無(wú)關(guān)。（ ）4．同一結(jié)構(gòu)的力法基本體系不是唯一的。 ）三、求圖示簡(jiǎn)支粱C點(diǎn)的豎向位移，EI =常數(shù)。（9分） 解：（1）作MP圖FPABCDFPlFPl/2FPlMP圖（2）作圖1A
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