20xx电大试题与答案土木工程力学(本)小抄(nxpowerlite)

20xx电大试题与答案土木工程力学(本)小抄(nxpowerlite)内容摘要：

B． 4 C． 4 D． 1 2． 图示超静定结构独立结点角位移的个数是 ( )。 专业好文档 第 26 页 共 31 页 A． 2 B． 3 C． 4 D． 5 3．静定结构产生内力的 原因有（ ）。 A． 荷载作用 B． 支座位移 C． 温度变化 D． 制造误差 4．超静定结构产生内力的原因有 ( )。 A．荷载作用与温度变化 B．支座位移 C．制造误差 D． 以上四 种原因 5．结构位移计算公式利用什么原理推导的 ( )。 A．位移互等原理 B．虚位 移原理 C．虚功原理 D．反力互等原理 6．机动法作静定梁影响线的理论依据是 ( )。 A．虚力原理 B．虚位移原理 C．位移互等定理 D．叠加原理 7．在图示结构中，为使体系自振频率  增大，可以 ( )。 A．增大 PF B．增大 m C．增大 EI D．增大 l 8．图示简支梁中间截面的弯矩为 ( )。 A． 82ql B． 42ql C． 22ql D． 2ql 9．一般情况下结点的不平衡力矩等于 ( )。 A．固端弯矩 B．传递弯矩 专业好文档 第 27 页 共 31 页 C．分配弯矩 D．附加刚臂中的约束反力矩 10．超静定结构的超静定次数等于结构中 ( )。 A．约束的数目 B．多余约束的数目 C．结点数 D．杆件数 三 （ 10分） 作图示静定梁的弯矩图。 四、（ 16 分） 用力法计算图示结构，作弯矩图。 EI=常数。 五 、（ 14 分） 用位移法计算图示刚架，列出典型方程，求出系数项及自由项。 EI=常数。 参考答案 一、判断题（以 √ 表示正确，以表示错误。 每小题 3 分，共 30 分） 1． 2． √ 3． 4． √ 5． √ 6． 7． √ 8． 9． 10． 二、 单项 选择题（ 每小题 3 分，共 30 分。 在所列备选项中，选一项正确的或最好的作为答案，将选专业好文档 第 28 页 共 31 页 项号填入各题的括号中 ） 1． A 2． B 3． A 4． D 5． C 6． B 7． C 8． A 9． D 10． B 三（ 10分） 四、（ 16 分） 解：（ 1）一次 超静定，基本体系和基本未知量，如图 (a)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 专业好文档 第 29 页 共 31 页 五 、（ 14 分） 解： 4EIi 典型方程 01111  PFk ik 1111 mkNF P  51 专业好文档 第 30 页 共 31 页 Winger TuivasaSheck, who scored two tries in the Kiwis39。 2018 semifinal win over England, has been passed fit after a lowerleg injury, while Slater has been named at fullback but is still recovering from a knee injury aggravated against USA. Both sides boast 100% records heading into the encounter but Australia have not conceded a try since Josh Charnley39。 s effort in their first pool match against England on the opening day. Aussie winger Jarryd Hayne is the petition39。 s top try scorer with nine, closely followed by TuivasaSheck with eight. But it is recently named Rugby League International Federation player of the year Sonny Bill Williams who has attracted the most interest in the tournament so far. The Kiwi with a tournament high 17 offloads has the chance of being the first player to win the World Cup in both rugby league and rugby union after triumphing with the All Blacks in 2020. I39。 d give every award back in a heartbeat just to get across the line this weekend, said (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。 s antiracism taskforce, is in London for the Football Association39。 s 150th anniversary celebrations and will attend City39。 s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。 s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。 s 21 win. Michel Platini, president of European football39。 s governing body, has also ordered an immediate investigation into the referee39。 s actions. CSKA said they were surprised and disappointed by Toure39。 s plaint. In a statement the Russian side added: We found no ra cist insults from fans of CSKA. Baumgartner the disappointing news: Mission aborted. The supersonic descent could happen as early as Sunda. The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) a nd into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. The balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform. They blew it in 2020 when they got caught cold in the final and they will not make the same mistake against the Kiwis in Manchester. Five years ago they cruised through to the final and so far history has repeated itself here the last try they conceded was scored by England39。 s Josh Charnley in the opening game of the tourna ment. That could be classed as a weakness, a team undercooked but I have been impressed by the Kangaroos39。 focus in their games since then. They have been concentrating on the sort of stuff that wins you tough, even contests strong defence, especially on their own goalline, pleting sets and a good kickchase. They39。 ve been great at all the unglamorous stuff that often goes unnoticed in the stands but not by your team mates. It is as though their entire tournament has been preparation for the final. In Johnathan Thurston, Cooper Cronk, Cameron Smith and either Billy Slater or Greg Inglis at full back they have a spine that。