学堂在线Structural Mechanics期末考试答案
1.判断题 (2.5分)
A structure is shown in figure (a), if figure (b) is taken as a primary structure of force method, then the primary equation is image.png.()
图（a）结构，取图（b）为力法基本结构，则其力法方程为 image.png( )。
正确答案：错误
2.判断题 (2.5分)
The coefficient image.png must be greater than zero in the typical equation of displacement methodimage.png.()
位移法经典方程image.png 中主系数 image.png一定大于零。（ ）
正确答案：正确
3.判断题 (2.5分)
The bending moment diagram of the structure shown in figure (a) is shown in figure (b).( )
图（a）所示结构的弯矩分布形状如图（b）所示。（ ）
正确答案：错误
4.判断题 (2.5分)
Regardless of the axial deformation of members, the following two beams are fully equivalent ( ).
当不考虑杆件轴向变形时，下面两图所示单跨超静定梁完全等效。（ ）
正确答案：正确
5.判断题 (2.5分)
The support reaction at section C for figure (a) FRCa is no larger than the support reaction at section C for figure (b) FRCb ()
图（a）与图（b）所示结构在支座C处的反力关系为FRCa不超过FRCb 。（ ）
正确答案：正确
6.判断题 (2.5分)
When internal forces of DAC part and CBE part for figure (a) are calculated, figure (b) can be used as an equivalent structure.()
图（a）所示结构计算 DAC 和 CBE 部分内力时，可以转化为图（b）所示体系计算。（ ）
正确答案：正确
7.判断题 (2.5分)
The axial force of member AB is 0 for the truss as the figure shown.()
图示桁架杆AB的轴力为零。 （ ）
正确答案：错误
8.单选题 (2.5分)
The geometric construction of the system as the figure shown is（ ）
图示体系的几何组成分析为（ ）
正确答案：B
9.单选题 (2.5分)
The geometric construction of the system as the figure shown is（ ）。
图示体系的几何组成分析为（ ）
正确答案：A
10.单选题 (2.5分)
For a symmetric structure shown in the figure, its half structure is ().
如图所示对称结构，其半结构计算简图为（ ）
正确答案：C
11.单选题 (2.5分)
Two structures are subjected to the same system of forces which is in equilibrium state. For the shear force and bending moment ( ).
图示两个结构受到相同的外荷载作用，且所受荷载均处于平衡状态，则图示两个结构的K截面和K1截面的剪力和弯矩为（ ）
正确答案：C
12.单选题 (2.5分)
The linear stiffness of a beam in the figure is i and the length is l. When a small rotation α occurs at the end A and a small displacement ∆=lα occurs at the end B, the bending moment at both ends of the beam (positive in clockwise for member ends) is ( ).
图示梁线刚度为i，长度为l，当A端发生微小转角α，B端发生微小位移∆=lα时，梁两端弯矩（对杆端顺时针为正）为（）
正确答案：B
13.单选题 (2.5分)
EI is a constant for the structure as the figure shown, P= 80kN. Regardless of the axial deformation, the vertical reaction of the middle column R is ( ).
图示结构各杆EI为常数，P= 80kN. 不计杆件轴向变形，则中柱的竖向支反力R为（ ）
正确答案：D
14.单选题 (2.5分)
In order to ensure that the negative bending moment (tension on the upper side) occurs in the midpoint section of the girder under external loads, we could ().
若要保证图示结构在外荷载作用下，梁跨中截面受拉），可采用（）
正确答案：B
15.单选题 (2.5分)
The correct bending moment diagram of the symmetric structure is ( ).
图示对称结构的弯矩图正确的是（ ）
正确答案：C
16.单选题 (2.5分)
Which of the following cases cannot be calculated by the moment distribution method？（ ）
下列哪一种情况不能用力矩分配法计算( )
正确答案：D
17.单选题 (2.5分)
Using the moment distribution method to analyze the structure as the figure shown, the distribution factor μAC is ( ).
用力矩分配法分析图示结构，分配系数μAC等于（）。
正确答案：C
18.单选题 (2.5分)
The correct bending moment diagram of the structure as the figure shown is ()
图示结构的四个弯矩图中，形状正确的一个是（ ）。
正确答案：A
19.单选题 (2.5分)
The shear force of section K for the structure is ( ).
图示结构中K截面的剪力为（）。
正确答案：C
20.填空题 (2.5分)
A three hinged arch and the loads acting on it are shown in the following figure. The bending moment of section K =(suppose that the bending moment is positive in the case of internal tension). The centre line of the arch follows a conic parabola given by the equation y=4fx(l -x)/l2（l=16 m ， f=4 m）
图示三铰拱受到外荷载作用，K截面的弯矩为 （假设截面内侧受拉时弯矩为正）。
正确答案：
填空1 : 0
21.填空题 (2.5分)
For the given truss shown in the figure, the axial force of member 1 FN1= P .
图示桁架受到外荷载作用，1截面的轴力为 P。
正确答案：
填空1 : 2.75
22.填空题 (2.5分)
The vertical displacement at point C for the beam shown in the figure is equal to (Suppose that downward is positive). h1=l/16，h2=l/20.
图示梁C截面的竖向位移为 （假设位移向下为正）
正确答案：
填空1 : 27αtl
23.填空题 (2.5分)
For the structure in figure (a), if figure (b) is taken as the primary structure of force method, and EI is a constant, then the coefficient δ11 in primary equation is ___image.png .
图（a）所示结构，取基本体系如图（b）所示，EI=常数，其力法方程中的系数δ11= 正确答案：
填空1 : 2
24.填空题 (2.5分)
EI is a constant for the structure, then MAB= ql2 (positive
when left side is tensile).
图示结构，各杆EI=常数，则MAB= ql2（左侧受拉为正）
正确答案：
填空1 : 0
25.填空题 (2.5分)
When the displacement method is used to calculate the rigid frame,the free term F1P is equal to kN∙m .
图示刚架用位移法计算时，自由项F1P= kN∙m。
正确答案：
填空1 : -10
26.填空题 (2.5分)
The coefficient k11 of the typical equation of displacement method for the structure in the figure is equal to______image.png.
图示结构位移法典型方程的系数k11= 正确答案：
填空1 : 17
27.填空题 (2.5分)
EI is a constant for the structure. The distribution factor μA4 = ______.(fill fraction)
图示结构EI=常数，用力矩分配法计算时分配系数μA4= （填分数）。
正确答案：
填空1 : 4/9
28.填空题 (2.5分)
The distribution momentimage.pngat the end A of member AB in the figure is equal to kN∙m.(positive in clockwise direction for member ends)
图示结构中，AB杆A端的分配弯矩image.png之值为 kN∙m（对杆端顺时针为正）。
正确答案：
填空1 : 8
29.填空题 (2.5分)
The bending moment of section A is equal to kN∙m
图示结构A截面的弯矩为MA= kN∙m。
正确答案：
填空1 : 0
30.填空题 (2.5分)
The axial force of member 1 is equal to .
图示结构杆1的轴力为 。
正确答案：
填空1 : -F/4
