靡谭巫法统案步颈算保绥戏熔
对应课程:点击查看
起止时间:2021-03-12到2021-07-11
更新状态:每5天更新一次
Chapter 1 Introduction Chapter 1 Exercise
1、 79% of China’s seismic fortification intensity zones have an intensity of ( ) or above
A:6
B:7
C:8
D:9
答案: 6
2、 Seismic intensity is mainly assessed according to( ).
A:The amount of energy released by the hypocenter
B:The velocity and acceleration of ground motion
C:The extent of the building damage, human feeling and other phenomena
D:Earthquake magnitude, focal depth, epicentral distance, soil conditions and topography
答案: The extent of the building damage, human feeling and other phenomena
3、 Seismic intensity is related to ( ).
A:Structure type
B:Epicentral distance
C:Administrative division
D:City size
答案: Epicentral distance
4、 Of the following earthquake categories, the most frequent is( ).
A:Tectonic earthquake
B:Volcanic earthquake
C:Collapse earthquake
D:Human-induced earthquake
答案: Tectonic earthquake
5、 Which is not the secondary disaster of earthquake( ).
A:Fire
B:Tsunami
C:Mudslide
D:Drought
答案: Drought
6、 Which is not the element of seismic wave( ).
A:Peak ground acceleration
B:Frequency spectrum
C:Earthquake intensity
D:duration
答案: Earthquake intensity
7、 Seismic phenomena show that S waves jolt the building up and down and P waves cause horizontal shaking and surface waves make the building vibrate both vertically and horizontally.
A:正确
B:错误
答案: 错误
8、 Seismic waves include P wave, S wave, Rayleigh wave and Love wave, of which the fastest is P wave.
A:正确
B:错误
答案: 正确
9、 Earthquake intensity is an important index to measure the size and scale of an earthquake.
A:正确
B:错误
答案: 错误
Chapter 2 Site, Subsoil and Foundation Chapter 3 Exercise
1、 When the vertical seismic action of high-rise residential buildings in the 9-degree area is calculated, the equivalent total gravity load Geq of the structure is ( ).
A:A. 0.85(1.2dead load standard value Gk+1.4 live load standard value Qk)
B:B. 0.85(Gk+Qk)
C:C. 0.75(Gk+0.5Qk)
D:D.0.85(Gk+0.5Qk)
答案: C. 0.75(Gk+0.5Qk)
2、 In addition to mass, seismic intensity and natural vibration period of structure, the standard value Fek of horizontal seismic action is also related to the following factors.()
A:A. Site plane size
B:B. Site feature cycle
C:C. Load component coefficient
D:D. Earthquake resistance grade,
答案: B. Site feature cycle
3、 The deformation caused by ground acceleration g(t) is exactly the same as that caused by external load p(t) equal to -mg(t).
A:正确
B:错误
答案: 正确
4、 In the first stage, the seismic bearing capacity of the member section and the elastic deformation of the structure under the action of multiple earthquakes should be checked according to the basic combination of the action effect of multiple earthquakes and other load effects. In the second stage, the elastic-plastic deformation of the structure is checked according to the rare earthquake action.
A:正确
B:错误
答案: 正确
5、 The seismic coefficient is the ratio of the peak acceleration of ground motion and the acceleration of gravity.
A:正确
B:错误
答案: 正确
6、 The seismic impact coefficient is defined as the ratio between the maximum horizontal seismic action on the elastic system of a single matter point and the gravity of the particle. α =F/G
A:正确
B:错误
答案: 正确
7、 The maximum seismic action of a single degree of freedom system is mass times maximum relative acceleration.
A:正确
B:错误
答案: 错误
8、 In the case of multi-DOF system vibration, the displacement ratio of each particle is fixed and does not change with time.
A:正确
B:错误
答案: 错误
9、 The effect of an earthquake action in a certain part of the structure is the sum of the effects under each mode.
A:正确
B:错误
答案: 错误
Chapter 3 Earthquake Response of SDOF&MDOF Chapter 3 Exercise
1、 A single degree of freedom system, the mass of particle is M=2000t and the stiffness of the system is 40000kN/m, and then its undamped circular frequency will be_ , and natural period (without considering damping) will be__ ; if a damping ratio of 0.05 is considered, the natural period will be slightly____than the one without damping.
A:4.472rad/s 1.508s smaller
B:4.472rad/s 1.405s larger
C:5.834rad/s 1.405s larger
D:5.834rad/s 1.508s larger
答案: 4.472rad/s 1.405s larger
2、 The seismic influence coefficient () represents as the ratio between_and its weight for a SDOF. It can be expressed as the seismic coefficient (k) times_.
A:the maximum absolute acceleration value participation factor (γ)
B:the maximum absolute acceleration value dynamic coefficient (β)
C:the maximum seismic effect participation factor (γ)
D:the maximum seismic effect dynamic coefficient (β)
答案: the maximum seismic effect dynamic coefficient (β)
3、 When the modal superposition response spectrum method is used for seismic analysis, the total response can be obtained by approach, which means that the modal responses of different modes cannot reach the maximum simultaneously. Therefore, the maximum seismic response the summation of the maximum response of each mode.
A:SRSS equal to
B:SRSS does not have to be equal to
C:CRC equal to
D:CRC does not have to be equal to
答案: SRSS does not have to be equal to
4、 Vibration mode is the basic shape of vibration. When the structural system vibrates in accordance with its natural frequency, the displacement ratio between the various particles . This special form of vibration is the structural mode. The structural modes are orthogonal to each other. In general, the degrees of freedom of the structural system is the same as that of the modes. The vibration curve of the system is superimposed by the harmonic vibration of each main vibration mode. The vibration modes of the structures are orthogonal to the mass and matrices.
A:remain unchanged stiffness
B:remain unchanged damping
C:changed stiffness
D:changed damping
答案: remain unchanged stiffness
上方为免费预览版答案，如需购买完整答案，请点击下方红字：
为了方便下次阅读，建议在浏览器添加书签收藏本网页
添加书签方法：
1.电脑按键盘的Ctrl键+D键即可收藏本网页
2.手机浏览器可以添加书签收藏本网页
点击浏览器底部菜单-【添加书签】-收藏本网页
点击浏览器底部菜单-【书签/历史】-可查看本网页
获取更多慕课答案，欢迎在浏览器访问我们的网站：
http://mooc.mengmianren.com
注：请切换至英文输入法输入域名，如果没有成功进入网站，请输入完整域名：http://mooc.mengmianren.com/
我们的公众号
打开手机微信，扫一扫下方二维码，关注微信公众号：萌面人APP
本公众号可查看各种网课答案，还可免费查看大学教材答案
点击这里，可查看公众号功能介绍
APP下载
APP功能说明
1.可查看各种网课答案
点击【萌面人官网】，可查看知到智慧树，超星尔雅学习通，学堂在线等网课答案
点击【中国大学慕课答案】，可查看mooc慕课答案
2.可一键领取淘宝/天猫/京东/拼多多无门槛优惠券
如图所示，点击对应图标即可领取淘宝/天猫/京东/拼多多无门槛优惠券
淡翘皮拧渡乳蹬群攘拿变澎僻