Your goal is to design a bridge with a 8-meter span, connecting points A and C as illustrated below. In your design, you have to satisfy the following constraints:
? Your bridge design should support a total vertical load P = 90 kN. Split the load equally among the joints in the bridge deck, excluding the support joints A and C. For example, the truss above will have all the load P applied to joint B. ? The height of your bridge has to be equal to 3 m, as illustrated above. ? Internal force in compressive members cannot exceed 52 kN. ? Internal force in tensile members cannot exceed 40 kN. First, you need to show why the simple truss above is not a good design. Then, propose a design and explain why your design is acceptable.
Homework Answers
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Your goal is to design a bridge with a 8-meter span, connecting
points A and C...
(a) Warren truss (b) Howe truss (c) Pratt truss (d) Baltimore truss (e) Parker truss Figure...
(a) Warren truss (b) Howe truss (c) Pratt truss (d) Baltimore truss (e) Parker truss Figure 2: Truss Types (Nielson Text) The truss bridge has the following properties/characteristics: 1. Span length (bottom chord): 168 ft 2. 14 panels (12 ft length per panel) 3. All diagonals are 45 degrees 4. Simple truss (all members are pin-connected and loads are only applied at the joints) 5. Simply-supported (pin at one end, roller at the other) 6. 13 ft width between trusses...
1. Design and analyze a bridge. Your truss structure should be made entirely of 2 force...
1. Design and analyze a bridge. Your truss structure should be made entirely of 2 force members, and should include at least 20 members in the design, have a minimum span of 2 feet, and be loaded with 15kg in the center. a) Label each member as being in tension, compression, or under 0 force. b) Identify which member will break first (support with calculations) c) Graph the force in the member that will break first as a function of...
Question 2 (15 points): Tension, Compression and Zero-Force Members in a Truss Structure. Consider the truss...
Question 2 (15 points): Tension, Compression and Zero-Force Members in a Truss Structure. Consider the truss structure shown in Figure 2. 3P (kN) P (kN) I LI LL Figure 2: Elevation view of 27 bar truss structure. Vertical loads of 3P kN and P kN are applied at nodes B and D, respectively. [2a) (3 pts). Compute the magnitude and direction of the total support reactions at points A and C. [25] (3 pts). Identify the zero-force members (If you...
Learning Goal: To calculate the shear stress at the web/flange joint in a beam and use...
Learning Goal: To calculate the shear stress at the web/flange joint in a beam and use that stress to calculate the required nail spacing to make a built- up beam. A built up beam can be constructed by fastening flat plates together. When an l-beam is subjected to a shear load, internal shear stress is developed at every cross section, with longitudinal shear stress balancing transverse shear stress. If the beam is built up using plates, the fasteners used must...
"Annexure B" ASSIGNMENT 2 DESIGN BRIEF Due to increasing pedestrian traffic of students travelling from halls of residence to the engineering block at one of its devised a...
"Annexure B" ASSIGNMENT 2 DESIGN BRIEF Due to increasing pedestrian traffic of students travelling from halls of residence to the engineering block at one of its devised a plan, which includes a new means of crossing a busy road safely and without causing traffic delay. A solution to protect student safety for crossing the busy road is to design and build a pedestrian bridge. This will eliminate traffic congestion and delays as well as eliminate conflict between pedestrians and motorists....
A 3 m rigid bar AB is supported with a vertical translational spring at A and a pin at B The bar is subjected to a linearly varying distributed load with maximum intensity g Calculate the ver...
A 3 m rigid bar AB is supported with a vertical translational spring at A and a pin at B The bar is subjected to a linearly varying distributed load with maximum intensity g Calculate the vertical deformation of the spring if the spring constant is 700 kN/m. (ans: 21.43 mm) 2. A steel cable with a nominal diameter of 25 mm is used in a construction yard to lift a bridge section weighing 38 kN. The cable has an...
answer the questions based on the informations on the 3 pictures please: What are the essential...
answer the questions based on the informations on the 3 pictures
please:
What are the essential responsibilities of a structural
designer or engineer in designing a structure?
What factors would you consider and why when planning the
design of a building structure?
You are the project team leader for the design of a single
family house in southwest Houston area. Discuss the types of
structural loads you think are important and explain
why.
d) Thermal load changes in perature cause...
summarizr the followung info and write them in your own words and break them into different...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...
summatize the following info and break them into differeng key points. write them in yojr own...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
Chapter overview 1. Reasons for international trade Resources reasons Economic reasons Other reasons 2. Difference between...
Chapter overview 1. Reasons for international trade Resources reasons Economic reasons Other reasons 2. Difference between international trade and domestic trade More complex context More difficult and risky Higher management skills required 3. Basic concept s relating to international trade Visible trade & invisible trade Favorable trade & unfavorable trade General trade system & special trade system Volume of international trade & quantum of international trade Commodity composition of international trade Geographical composition of international trade Degree / ratio of...
(a) Warren truss (b) Howe truss (c) Pratt truss (d) Baltimore truss (e) Parker truss Figure 2: Truss Types (Nielson Text) The truss bridge has the following properties/characteristics: 1. Span length (bottom chord): 168 ft 2. 14 panels (12 ft length per panel) 3. All diagonals are 45 degrees 4. Simple truss (all members are pin-connected and loads are only applied at the joints) 5. Simply-supported (pin at one end, roller at the other) 6. 13 ft width between trusses...
1. Design and analyze a bridge. Your truss structure should be made entirely of 2 force members, and should include at least 20 members in the design, have a minimum span of 2 feet, and be loaded with 15kg in the center. a) Label each member as being in tension, compression, or under 0 force. b) Identify which member will break first (support with calculations) c) Graph the force in the member that will break first as a function of...
Question 2 (15 points): Tension, Compression and Zero-Force Members in a Truss Structure. Consider the truss structure shown in Figure 2. 3P (kN) P (kN) I LI LL Figure 2: Elevation view of 27 bar truss structure. Vertical loads of 3P kN and P kN are applied at nodes B and D, respectively. [2a) (3 pts). Compute the magnitude and direction of the total support reactions at points A and C. [25] (3 pts). Identify the zero-force members (If you...
Learning Goal: To calculate the shear stress at the web/flange joint in a beam and use that stress to calculate the required nail spacing to make a built- up beam. A built up beam can be constructed by fastening flat plates together. When an l-beam is subjected to a shear load, internal shear stress is developed at every cross section, with longitudinal shear stress balancing transverse shear stress. If the beam is built up using plates, the fasteners used must...
"Annexure B" ASSIGNMENT 2 DESIGN BRIEF Due to increasing pedestrian traffic of students travelling from halls of residence to the engineering block at one of its devised a plan, which includes a new means of crossing a busy road safely and without causing traffic delay. A solution to protect student safety for crossing the busy road is to design and build a pedestrian bridge. This will eliminate traffic congestion and delays as well as eliminate conflict between pedestrians and motorists....
A 3 m rigid bar AB is supported with a vertical translational spring at A and a pin at B The bar is subjected to a linearly varying distributed load with maximum intensity g Calculate the vertical deformation of the spring if the spring constant is 700 kN/m. (ans: 21.43 mm) 2. A steel cable with a nominal diameter of 25 mm is used in a construction yard to lift a bridge section weighing 38 kN. The cable has an...
answer the questions based on the informations on the 3 pictures
please:
What are the essential responsibilities of a structural
designer or engineer in designing a structure?
What factors would you consider and why when planning the
design of a building structure?
You are the project team leader for the design of a single
family house in southwest Houston area. Discuss the types of
structural loads you think are important and explain
why.
d) Thermal load changes in perature cause...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
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