(0729)《结构力学》西南大学22年6月第一套限时答案
此题为判断题(对,错)。
此题为判断题(对,错)。
钢拱桥按铰的数目可分为三铰拱、双铰拱及无铰拱。
此题为判断题(对,错)。
A.与压力线重合
B.只有1条
C.形状决定于相当简支梁的弯矩和剪力
D.可能不会通过三铰拱的顶铰。
B.单铰拱、双铰拱、三铰拱和多铰拱
C.单铰拱、双铰拱、三铰拱和无铰拱
D.零铰拱、单铰拱和双铰拱
拱分单铰拱、双铰拱、三铰拱和无铰拱。
窗体顶端西南大学培训与继续教育学院课程课程名称【编号】:(0729)结构力学一、判断题(本大题共10小题,每道题2.0分,共20.0分)1. 不能用图乘法求三铰拱的位移。 对 错 2. 改变荷载值的大小,三铰拱的合理拱轴线不变。 对 错 3. 位移法和力矩分配法只能用于求超静定结构的内力,不能用于求静定结构的内力。() 对 错 4. 图示体系是几何不变体系。 对 错 5. 有多余约束的体系一定是超静定结构。( ) 对 错 6. 静定结构的内力与荷载有关,而与材料的性质、截面的形状及大小无关。 对 错 7. 静定结构在非荷载外因(支座移动、温度改变、制造误差)作用下,不产生内力,但产生位移。 ( ) 对 错 8. 三铰拱的主要受力特点是:在竖向荷载作用下产生水平反力。 对 错 9. 几何可变体系在任何荷载作用下都不能平衡。( ) 对 错 10. 如果梁的截面刚度是截面位置的函数,则它的位移不能用图乘法计算。 对 错 二、单项选择题(本大题共10小题,每道题4.0分,共40.0分)1. 图示体系的几何组成为:A.几何不变,无多余联系; B.几何不变,有多余联系; C. 瞬变; D.常变。 2. 图示两结构相同的是( )A.剪力 B.轴力 C.C点竖向位移 D.弯矩 3. 图2所示结构的超静定次数、未知结点位移数是:A.超静定次数是0、未知结点位移数是0 B.超静定次数是1、未知结点位移数是0 C.超静定次数是1、未知结点位移数是1 D.超静定次数是1、未知结点位移数是0 4. 图中取A支座反力为力法的基本末知量(向上为正),则为: A.3P/16; B.4P/16; C.5P/16; D.不定,取决于EI值。 5. 图示体系的几何组成为:A.几何不变,无多余联系; B.几何不变,有多余联系; C. 瞬变; D.常变。 6. 图示体系为:A.几何不变无多余约束; B.几何不变有多余约束; C.几何常变; D.几何瞬变。 7. 图示体系为:A.几何不变无多余约束; B.几何不变有多余约束; C.几何常变; D.几何瞬变。 8. 图示结构的两个状态,位移互等,和的量纲为:状态(1) 状态(2) A.长度; B.无量纲; C.长度/力; D.力/长度。 9. 图示体系为:A.几何不变无多余约束; B.几何不变有多余约束; C.几何常变; D.几何瞬变。 10. 图示体系为:A.几何不变无多余约束; B.几何不变有多余约束; C.几何常变; D.几何瞬变。 三、填空题(本大题共5小题,每道题4.0分,共20.0分)1. 图示结构CD杆的内力为_。 2. 所谓联系是指_.是指事物之间及事物内部诸要素之间的相互影响,相互制约和相互作用。 3. 图示结构K截面的M值为_,_侧受拉。 3q d2/2;左4. 静定结构的几何特征为_,_。 体系几何不变,无多余约束 5. 几何组成分析中,在平面内固定一个点,需要_。不共线的两根链杆 四、计算题(本大题共1小题,每道题20.0分,共20.0分)1. 试求图示结构铰A两侧截面的相对转角,EI=常数。窗体底端
B、 单铰拱、双铰拱、三铰拱和多铰拱
C、 单铰拱、双铰拱、三铰拱和无铰拱
D、 零铰拱、单铰拱和双铰拱
B.单铰拱、双铰拱、三铰拱和多铰拱
C.单铰拱、双铰拱、三铰拱和无铰拱
D.零铰拱、单铰拱和双铰拱
拱分单铰拱、双铰拱、三铰拱和无铰拱。
B.两铰拱
C.无铰拱
D.三铰拱和两铰拱
B.Ⅱ、Ⅲ
C.Ⅲ、Ⅳ
D.Ⅰ、Ⅳ
B.合理轴线的跨度可以任意
C.任意荷载和跨度下均为合理轴线
D.合理轴线时弯矩为零,但剪力不一定为零
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