建筑力学复习题及答案期末小抄

建筑力学复习题及答案期末小抄内容摘要：

ent, resour ces, water, economic development advant age advant age, advantage as policy overlap, cultur al enr ichment, and indust rial boards, insti utional weakness, shor t people short , shor t of funds and t alent . Fr om t he per spect ive of ecological envir onment , our egion as an import ant guarant ee of nat ional ecological saf ety, high f or est cover , wat er , air and soil environment al indicat or s, such as t he natur e, is t he development of green f ood and preser ving pension ideal places, forest carbon sinks and other indust ries. From t he per spect ive of the prior it y of characteristic r esources, wild blueberr y, Nort her n f orest r esour ces such as drugs, big snow, big wetlands, River and f orest tourism r esources, variet y, large reser ves of mineral r esources such as m olybdenum, lead and zinc, has t r anslat ed int o str ong material conditons for economic advantage. Economic development out of t he water, t otal m or e t han 16 bilon cubic meter s of sur face water r esources and hydroj unction project of development pr ospects。 r ecover able r eserves of high qualit y m iner al wat er r esources milon t ons , is t he base of rare natural and polution free mineral wat er . Seen f rom t he advantages of cult ur al enr ichment, wit h Nor thern cult ure, and Xianbei cult ur es, Or oqen cult ure and a number of cult ural r esour ces, r ock only f ound m or e t han 1000 paint ings, cult ural indust ry development has great potent ial. Fr om t he perspective of policy overlap advantage, wit h t he St at e For estr y Administ ration and t he provincial gover nment wo channels of policy t owar ds dir ect enjoyment of natural f orest protection program, Western development , r esource based cit ies sust ainable development and main f unct ion region const ruction nat ional policy planning. As long as we put these r esour ces to use and exploit t he advantages of good, could give guanghui, snow, cold r egion and black Glebe int o gold and silver , wil pr ovide str ong suppor t f or f orest development . ( In addit ion to J ia Shuji m entioned advantages, XX we have in agricult ur e, water conservancy and other unique r esources. Agricult ural r esour ces, m ilon m u of arable land t hroughout he Count y, da hinggan Ling was t he only predom inantly r ural administr ative dist rict s, green planting area of 850, 000 acr es. Wat er r esour ces, in a r iver over more t han 180, many r iver hydr opower developm ent pr oject conditons, r ich in t hree five Luo and A． 2 B． 3 C． 4 D． 5 10．力偶可以在它的作用平面内 ( )，而不改变它对物体的作用。 A．任意移动 B．任意转动 C．任意移动和转动 D．既不能移动也不能转动 二 、判断题（每小题 2 分，共计 30 分。 将判断结果填入括弧，以√表示正确，以 表示错误） 1．约束是阻碍物体运动的限制物。 ( ) 2．力沿坐标轴方向上的分力是矢量，力在坐标轴上的投影是代数量。 ( ) 3．力系简化所得的合力的投影和简化中心位置有 关，而合力偶矩和简化中心位置有关。 ( ) 4．几何不变体系是指在荷载作用下，不考虑材料的位移时，结构的形状和位置都不可能变化的结构体系。 ( ) 5．没有多余约束的几何不变体系组成的结构是超静定结构。 ( ) 6．平行于梁横截面的内力是剪力，作用面与梁横截面垂直的内力偶是弯矩。 ( ) 7．轴向拉伸 (压缩 )的正应力大小和轴力的大小成正比，规定拉为正，压为负。 ( ) 8．安全因素取值大于 1 的目的是为了使构件具有足够的安全储备。 ( ) 9．压杆上的压力大于临界荷载，是压杆稳定平衡的 前提。 ( ) 10．梁横截面竖向线位移称为挠度，横截面绕中性轴转过的角度称为转角。 ( ) 11．图乘法的正负号规定为：面积  与纵坐标 0y 在杆的同一边时，乘积 0y 应取正号；面积  与纵坐标 0y 在杆的不同边时，乘积 0y 应取负号。 ( ) 12．结点角位移的数 目就等于结构超静定的次数。 ( ) 13．物体系统是指由若干个物体通过约束按一定方式连接而成的系统。 ( ) 14．有面积相等的正方形和圆形，比较两图形对形心轴惯性矩的大小，可知前者比后者大。 ( ) 15．计算简图是指经过简化后可以用于对实际结构进行受力分析的图形。 ( ) 三 、 计算 题（共 40 分） 1． 计算 下 图所示桁架的支座反力及 2 杆的轴力。 （ 10 分） 2．画出下图所示梁的内力图（ 10 分）。 2020 lear ning im plement t o t ube m ain leaders topic seminar spir it counselling m at er ial 2020 learning im plement o tube main leaders t opic seminar spir it counselling m aterial M arch 7, XI Gener al Secretar y t o Ipr ovince delegat ion par ticipate in considered and published has im port ant speech, on XXX pr ovince people for China r evolution victor y and Socialist const ruct ion made of contr ibut ion give has cert ainly, on Ipr ovince past f ive year s im plement at ion focus str at egy, and gr asp focus indust ry, economic social development made of result s give has cert ainly, Clarif ied the demands f or development of XXX, r ef er ring t o bot h dir ect ions, tasks and issues, t eaching met hods, for t he cur rent and f uture development in Heilongjiang pr ovince, is of gr eat pract ical signif icance and far reaching hist orical signif icance. Mar ch 22 to 24th, pr ovincial held has province t ube main leader s t opic seminar, pr ovincial Secr et ar y Wang Xiankui r ade in seminar opening pr ovince do has import ant speech, Wang Xiankui st r essed: in depth learning acquisiton Gener al Secretar y of speech, is on XXX a polit ical account , we m ust put lear ning im plement XI Gener al Secretar y im por tant speech spir it as major polit ical t ask, adapt ed and led economic development new nor mal, insisted to economic const ruction f or Cent er not shake, implement im plementat ion ew development concept, weaknesses, and swager gr ams shor t, and yangchangbuduan, St imulate t he endogenous dynamics, f ormation eff ect of EMU, f ir m im plementation of the five planning, the development of key indust ries, open Dr agon River pr ehensive revitalization new journey, st ruggling t o get out of a high qualit y, ef ficient, bet ter st ruct ure and development r oad of r evit alizat ion of t he advantages int o f ul play. M ar ch 29 to 30th, t he Commit t ee anized a pi e major themat ic seminar of leading cadr es prefect ural rade J ia Yumei made an import ant speech at t he opening ceremony. J ia Shuj i str essed, f ul dist rict upper and lower must o ef f ect ive enhanced lear ning publicit y im plement implementation XI General Secr et ar y im port ant speech spir it of polit ical consciously, and t hought consciously, and action c。