moocBridge Engineering答案(慕课2023课后作业答案)
59 min readmoocBridge Engineering答案(慕课2023课后作业答案)
Quiz for Chapter 1
1、案慕案Where does the original idea of bridge come from?课课
A、Wood log
B、后作Stone cave
C、业答Floating rattan
D、案慕案All of the above
2、课课Why can Zhaozhou Bridge last long？
A、后作Good quality
B、业答Routine maintenance
C、案慕案Suitable material
D、课课All of the above
3、后作Which bridge is 业答the first arch bridge that has a span exceeding 500m?
A、Zhaozhou Bridge
B、案慕案Lugou Bridge
C、课课Bayonne Bridge
D、后作Sydney arch Bridge
4、How many bridge types can you identify after taking this class?
A、1
B、2
C、3
D、4 and more
5、How many bridges are there over Huangpu River ?
A、9
B、11
C、12
D、13
6、The disaster came to Tacoma suspension because of a hurricane.
7、We only need to pay attention to the strength of the Arch bridges.
8、The development of modern bridges is only related to the construction devices.
9、Lighter material can make bridge span longer.
10、We can built the bridge as longer as we want.
1.2 Bridge components and classification
Quiz for Chapter2
1、For simply supported beam bridges,which of the following relationship is correct?
A、clear span<standard span<computed span
B、clear span< computed span< standard span
C、computed span< standard span< clear span
D、standard span< clear span< computed span
2、Which of the following could reflect the flood discharge capacity of the bridge?
A、computed span
B、total span
C、the height of the bridge
D、clear span
3、Which of the following is not included in the five major components?
A、bearing system
B、pier
C、bridge deck pavement
D、foundation
4、How many structure systems of the bridge have you learned after this class?
A、3
B、4
C、5
D、6 and more
5、Which of the following bridge structure types has the largeset span capacity?
A、beam bridge
B、arch bridge
C、suspension bridge
D、cable-stayed bridge
6、The total span of river crossing bridge is generally determined by hydrological calculation.
7、The total length of the bridge is the horizontal distance between the side walls of the abutment on both sides.
8、The building height of the bridge shall not be greater than the allowable building height to ensure the navigation requirements under the bridge.
9、Ror arch bridges,the force transmitted by the arch ring to the pier has not only a large vertical reaction, but also a large horizontal thrust.
10、The world record of cable-stayed bridge is Sutongbridge in China.
chapter3-4 Bridge design planning and action combination
quiz 2
1、The load level of the vehicle acting on the road bridge depends on ( )
A、traffic volume
B、standard span
C、road grade
D、bridge type
2、The overall calculation of bridge structure adopts（）
A、automobile load
B、lane load
C、uniform load
D、concentrated load
3、The bridge design procedure in China can be divided into the preliminary work and the design stage, and the design stage is carried out according to the following three stages
A、superstructure design ,substructure design and foundation design
B、preliminary design，elevation design and section design
C、bridge type design,section design and construction design
D、preliminary design,technical design,construction design
4、Which of the following options is not a basic part of the general planning and design of bridges?
A、bridge location selection
B、determination of total span of bridge
C、bridge type selection
D、bridge load statistics
5、For the river crossing bridge, the flow pressure belongs to（）
A、dead load
B、temporary load
C、variable action
D、accidental action
6、Which of the following load type do ship collision force and vehicle impact force belong to?
A、dead load
B、temporary load
C、accidental load
D、variable load
7、Generally, the bridge design actions are divided into_______,_______,_______,_______.
8、Bridge design should be in accordance with the principles of _______,_______,_______,_______,_______and aesthetic.
9、The vehicle load includes lane load and automobile load, and ______________ is used for local calculation of bridge structure and bridge abutment verification.
10、Lane load consists of ______________ and______________.
chapter 5 RC and PC beam bridges
Quiz for Chapter 5
1、The main supporting structure of beam bridge is ___________? ( ).
A、bridge deck
B、girder
C、cross beam
D、diaphragm
2、Which one should be correct for the design of the section of structure? ( )
A、σmax > σallowable
B、σmax < σallowable
C、σmax = σallowable
D、σmax≤σallowable
3、Under tension, which material can hold large elastic deformation? ( )
A、concrete
B、rebar
C、both
D、none
4、The degree of prestressing (λ) for Full Prestressing concrete structure should be _____. ( )
A、λ ≤ 1
B、λ ≥1
C、λ= 2
D、λ > 1
5、As per Standard drawing by MOT, the span range for prestressed concrete T-shaped beam is ________ . ( )
A、10 ~ 20
B、20 ~ 30
C、25 ~ 30
D、25 ~ 40
6、How many section types have you learned in this chapter?
A、0
B、1
C、2
D、3 and more
7、The simple-supported beam bridge is statically determinate structure. ( )
8、The continuous beam bridge is statically determinate structure. ( )
9、RC and PC cantilever beam bridge are less applied in practical bridge engineering because of more complicated design of local components such as bracket, expansion joint and the discontinuous deck deformation under live loads.
10、Slab bridge is only used in small span bridge，commonly less than 10m
chapter 6 Design Principle of Assembled Simply Supported Beam Bridge
Quiz for Chapter 6
1、Which shaped beam bridge has high transverse bending rigidity? ( )
A、
B、T-shaped
C、Box Girder
D、Solid Slab
2、Which shaped beam bridge has large torsional strength? ( )
A、
B、T-shaped
C、Box Girder
D、Solid Slab
3、The bigger the diaphragms’ _________________ is better in the overall performance of the bridge. ( )
A、Strength
B、Stiffness
C、Stress
D、pressure
4、Thickness of concrete cover on both side should be _____ for resisting cracks. ( )
A、≤1.5 cm
B、≥1.5 cm
C、≤1.0 cm
D、≥2.5 cm
5、The clear distance between the longitudinal rebar and the bottom of the beam in T-beams should be __________. ( )
A、2 to 4 cm
B、3 to 4 cm
C、3 to 5 cm
D、4 to 5 cm
6、Besides end diaphragms, we should add 1~3 diaphragms in other positions(middle、1/4).
7、The main reinforcement are arranged at the upper edge of the plate in transverse direction is to resist the negative moment of cantilever? ( )
8、Tendons are straight and they never bend.
9、The section efficiency index for rectangular section is 0.33.
10、Main reinforcements are always placed near the upper edge in the middle of beams, so the pressure of concrete can counteract the tensile stress caused by the actions of dead loads and live loads
chapter 7 Bridge Deck
Quiz for Chapter 7
1、Which of the following is monodirectional slab?
A、Ia/Ib≥2
B、Ia/Ib≤2
C、Ia/Ib≤1.5
D、Ia/Ib≤1
2、How many types of slab have you learned in this chapter?
A、1
B、2
C、3
D、4 and more
3、Which of the following is bidirectional slab?
A、Ia/Ib≥2
B、Ia/Ib≥3
C、Ia/Ib≤3
D、Ia/Ib≤2
4、The real shape of the contact surface between the wheel and the deck slab is approximately ellipse.Commonly, the approximate shape is treated as a ( ).
A、circle
B、ellipse
C、rectangle
D、triangle
5、The effective work width of the deck is not related with ( ).
A、support condition
B、load type
C、load location
D、foundation type
6、The effective work width a calculated by the formula can be more than the total width of the slab.
7、According to the elastic plate theory，when a concentrating load P is acting on the end of the slab，the max negative moment of the loaded slab strip mxmax=-0.465P.
8、The deck slab with solid rectangle section is controlled by shear force in design.
9、For hinged cantilever slab,the most adverse load location is in the hinge point .
10、When t/h<1/4 （the torsion stiffness of the beam is large）, Moment on the support Ms = -0.5M0 Mid-span moment Mc = +0.7M0
chapter 8 Calculation of Live Load Lateral Distribution
Quiz for Chapter 8
1、By means of the concept of “live load lateral distribution coefficient”, the 3D problem is simplified as _______ problem? ( )
A、1D
B、2D
C、3D
D、4D
2、In ____________ method, the link between the transverse structures of the main beam can be neglected, and the slab is regarded as a simply supported or a cantilever beam on the main beams. ( )
A、Practical
B、The lever
C、Rigid Cross Beam
D、G-M metohd
3、In _____________ method, it is assume that torsional rigidity of the main beams can be ignored.
A、Practical
B、The lever
C、Rigid Cross Beam
D、G-M metohd
4、How many methods of the calculation of live load lateral distribution have you learned in this chapter?
A、1
B、2
C、3
D、4 and more
5、When the hinge slab method is used to calculate the lateral distribution coefficient of load in highway bridges, it is based on___________( )
A、Mid span bending moment of hinged slab
B、Pivot reaction of hinged slab
C、Shear force of hinged slab
D、Mid span deflection of hinged slab
6、The larger the transverse connection stiffness, the more obvious the action of transverse load distribution. ( )
7、In Rigid Cross Beam Method, under the eccentric live load along the transverse direction, the side beam which is close to the live load, bears the minimum load. ( )
8、Each internal force in any position has its own influence surface of internal force, and transverse distribution coefficient “m0”. ( )
9、Shear forces must not ignore the change of mc along the span length.
10、In practical use, only the load which is close to pivot cross section needs to consider the change of mc. ( )
chapter 10 and 11 Bridge bearing and construction method
Quiz for Chapter 10 and 11
1、How many bearing types have you learned in this chapter?
A、1
B、2
C、3
D、4 and more
2、Which of the following is not the advantage of the rubber bearing?
A、simple structure
B、accommodate all deformations of all kinds of broad bridges
C、reduce the seismic inertia force of the girder
D、vulnerable to climate
3、Compared with the plate-type rubber bearing,which of the following is not the advantage of the pot-type rubber bearing.
A、great bearing capacity
B、large translational displacement
C、flexible rotation
D、ageing problem
4、How many construction method have you learned in this chapter?
A、2
B、3
C、4
D、5 and more
5、For incremental launching method,the length of the launching nose is usually ( ) span length of beam bridges.
A、0.1-0.2
B、0.3-0.4
C、0.5-0.6
D、0.6-0.7
6、Too short launching noses will lead to the increase of the negative construction moment of the girder.
7、For balanced cantilever construction method,the application span is usually more than 150m.
8、Balanced cantilever construction method won't disrupt the traffic and services below the bridge.
9、The applicable span for mobile formwork construction method is 120-150m.
10、Large-scale lifting devices aren't necessarily needed when incremental launching method is used.
chapter 9 The calculation for Internal Forces of Simply Supported Beam Bridges
Quiz for Chapter 9
1、For simply supported beam bridges with larger span,which of the following location is not usually considered ?
A、middle
B、support points
C、1/4L
D、3/10L
2、Generally speaking, we should calculate the shear and the maximun moment of the ( ), and the shear of the supporting sections.
A、middle span
B、1/4L
C、1/8L
D、3/8L
3、According to the codes,for beam bridges,the maximun deflection of the middle span caused by the vehicle load(excluding impact forces) should be less than ( ).
A、L/400
B、L/500
C、L/600
D、L/450
4、According to codes, if the camber calculated is less than ( ), we set no camber.
A、L/1500
B、L/1550
C、L/1650
D、L/1600
5、The deflection of the cantilever end of cantilever systems should be less than ( ).
A、L/300
B、L/400
C、L/500
D、L/600
6、The deflection of dead loads permanently exists and includes the short-term deflection and the long-term deflection.
7、The deflection of live loads exists permanently, and once the live load leaves the bridge, the deflection will not disappear.
8、The change of shears between the middle span and the supporting section is approximately linear.
9、For each girder, according to its dead loads and live loads which are caused by lateral load distribution, we can calculate the internal forces by the use of mechanics of materials .
10、80%~90% of maximum design internal forces of beam bridges is caused by dead loads and live loads.
chapter 12 Cantilever and Continuous Beam Bridge
Quiz for Chapter 12
1、How many types of cantilever beam bridge have you learned in this chapter?
A、1
B、2
C、3
D、4 and more
2、The moment of the middle span under live loads is ( ) to the simply supported beam bridge of the same span
A、>
B、<
C、=
D、not certain
3、For prestressed cantilever beam bridges,maximum span is less than___()
A、60m
B、70m
C、90m
D、100m
4、For elevation design,which of the following should not be considered?
A、bridge type
B、total length of the bridge and each span's length
C、the height of the bridge
D、the width of the deck slab
5、For continuous beam bridge,side span/midspan≈( )
A、0.1-0.2
B、0.3-0.4
C、0.5-0.6
D、0.6-0.8
6、For T-shaped rigid frame bridge with the suspended beam,each independent T-frame can work together to bear loads and accommodate deformations
7、We need no bearing when we use rigid frame bridge because the superstructure and the substructure are consolidated.
8、The world record of continuous beam bridges is Rio–Niterói Bridge.
9、For continuous beam bridge,the negative moment of the support points will reduce the positive moment of the middle span, leading to the reduction of the section height and the increase of the span length.
10、The piers of rigid frame bridge do not bear horizontal thrust.
chapter 13 Arch Bridge
Quiz for Chapter 13
1、Which of the following is not arch bridge in China?
A、The Zhaozhou Bridge
B、Lugou Bridge
C、Coalbrookdale Bridge
D、Maple Bridge
2、Which of the following is world record for steel arch bridge?
A、Chaotianmen Yangtze Grand Bridge
B、Caiyuanba Yangtze River Bridge
C、Lupu Bridge
D、Bosideng Yangtze River Bridge
3、Which of the following is not the advantage of arch bridge?
A、great span capacity
B、The large horizontal thrust increases the size of the substructure, leading to high requirements of the foundation
C、accessiable materials
D、pleasing appearance
4、Which of the components does not belong to arch bridge?
A、arch spring
B、arch intrados
C、vault
D、main cable
5、The alignments of the arch axis don't consist of ( )
A、circular
B、parabolic
C、catenary
D、ellipse
6、The main arch is main bearing structure for arch bridges.
7、For three-hinged arch bridge,it is indeterminate，and applicable for strong-foundation areas.
8、The section types of the main arch consist of slab arch bridge,rib arch bridge,double-convex arch bridge,and box arch bridge.
9、China has a long-standing history of arch bridges, thus being called the country of the arch bridge.
10、The internal forces are not related to the alignment of the arch axis.
学习通Bridge Engineering
Bridge Engineering是一个关于桥梁工程的在线学习平台，为学生和专业人士提供各种桥梁工程课程和研究资源。
课程概述
Bridge Engineering平台提供各种桥梁工程课程，从基础知识到高级设计和分析。学生可以通过这些课程了解桥梁的设计和施工，以及桥梁在不同环境下的性能和耐久性。
课程涵盖的主题包括：
- 桥梁基础知识
- 桥梁设计和分析
- 桥梁施工和维护
- 桥梁耐久性和性能
- 桥梁安全和可靠性
学习资源
Bridge Engineering平台提供各种学习资源，包括：
- 课程视频
- 课程文本
- 案例研究
- 练习题和测验
- 论文和研究资料
学习目标
通过使用Bridge Engineering平台，学生可以达到以下学习目标：
- 了解桥梁工程的基础知识
- 掌握桥梁设计和分析的基本原理和技术
- 熟悉桥梁施工和维护的方法和流程
- 了解桥梁在不同环境下的性能和耐久性
- 提高桥梁安全和可靠性的意识和技能
课程示例
Bridge Engineering平台提供了多个桥梁工程课程示例，包括：
- Introduction to Bridge Engineering
- Bridge Design and Analysis
- Bridge Construction and Maintenance
- Bridge Performance and Durability
- Bridge Safety and Reliability
Introduction to Bridge Engineering
这一课程介绍了桥梁工程的基础知识，包括桥梁的构造、材料、设计和施工。学生可以通过这个课程了解桥梁工程的历史和发展，以及桥梁在现代社会中的重要性。
Bridge Design and Analysis
这一课程介绍了桥梁设计和分析的基本原理和技术。学生可以通过这个课程学习桥梁的设计过程，包括材料选择、结构设计和荷载计算。此外，学生还可以学习如何使用计算机软件进行桥梁分析和建模。
Bridge Construction and Maintenance
这一课程介绍了桥梁施工和维护的方法和流程。学生可以通过这个课程学习如何进行桥梁施工，包括建造临时结构和安装桥梁元件。此外，学生还可以学习如何进行桥梁维护，包括检查和修复桥梁的损坏。
Bridge Performance and Durability
这一课程介绍了桥梁在不同环境下的性能和耐久性。学生可以通过这个课程学习桥梁受气候、地震和其他自然灾害影响的情况下的行为和响应。此外，学生还可以学习如何通过维护和修复来提高桥梁的耐久性。
Bridge Safety and Reliability
这一课程介绍了桥梁的安全和可靠性。学生可以通过这个课程学习如何评估桥梁的安全性和可靠性，以及如何采取措施来提高桥梁的安全性和可靠性。
总结
Bridge Engineering平台为学生和专业人士提供了一个学习桥梁工程的重要资源。通过这个平台，学生可以了解桥梁工程的基础知识、掌握桥梁设计和分析的基本原理和技术、熟悉桥梁施工和维护的方法和流程，以及了解桥梁在不同环境下的性能和耐久性。此外，学生还可以提高桥梁安全和可靠性的意识和技能。
中国大学Bridge Engineering
中国大学Bridge Engineering是一项由中国大学主办的工程项目，旨在培养高水平的桥梁工程专业人才。该项目成立于1992年，至今已经培养了数千名优秀的桥梁工程人才。
课程设置
中国大学Bridge Engineering项目的课程设置非常丰富，包括以下主要课程：
- 结构力学
- 桥梁设计与施工
- 桥梁材料与加固
- 桥梁安全评估与维护
- 桥梁抗震设计
此外，该项目还为学生提供了丰富的实践机会，例如桥梁设计、施工和维护等方面的实习。
教学团队
中国大学Bridge Engineering项目的教学团队由一批具有国际水平的专业人才组成，他们都是桥梁工程领域的专家。
这些教师既拥有丰富的理论知识，又具备实践经验，他们能够帮助学生全面了解桥梁工程领域的知识和技能。
研究成果
中国大学Bridge Engineering项目在桥梁工程领域取得了许多重要的研究成果，其中包括：
- 独立开发了一种新型桥梁结构设计软件
- 成功设计并建造了多座跨度超长的悬索桥
- 制定了一套系统的桥梁安全评估标准
这些研究成果得到了国际上的广泛认可，为桥梁工程领域的发展做出了重要贡献。
毕业生就业
中国大学Bridge Engineering项目的毕业生在桥梁工程领域的就业率非常高，他们被广泛招聘到各大桥梁工程公司和科研机构。
他们所取得的成就和进步为桥梁工程领域的发展提供了源源不断的动力。
结论
总之，中国大学Bridge Engineering是一项非常优秀的工程项目，它为桥梁工程领域的培养和发展做出了重要贡献。
它的课程设置丰富，教学团队精英云集，研究成果丰硕，毕业生就业率高，值得广大学子考虑和选择。
