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Bridge Construction Powerpoint Template

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Bridge Construction

Transcript: 1/3 of bridge opp 2 crossbar 30* Placement: center of luggage, allows for control of entire bag 4 dyson balls on bottom of luggage so it can easily move in every direction Luggage 62 cm tall, 25 cm 65 cm R = 5,833.33g d HOW 4.8N Compression bridge weight 3) 5.5N 4) 6N 6.4N 20N 2.5 N 30N E = Stress = F/A R = 4,333.33g R x 60 = 6,000 x 25 + 10,000 x 20 = 350,000g 19.3N 1) 6N 2) 5N Move in opposition of the resonance frequency in a structure with springs or pendulums Reduce overall movement of the bridge Measure angle = 37* 1/3 of bridge length 10N 2.1 N 12N 3.5N Filled in at end of each day F bridge length 5,083.33g + 5,833.33g + 5,083.33g = 16,000g Ft = 10N Fx = 6.4N Fy = 7.7N What would happen if there were 3 supporting pillars? 7.933 strips used @ 1,000 pounds/strip = 7,933.33 pounds = $13,090 1 1/2 W 20N Lab 3: Static Equilibrium Hyper Physics 40* spring scale 22 cm 50N Sum of Forces table 70 deg. Triangle = greatest ratio = strongest shape 2 Equilibrium 2 1) 7N 2) 6N 32.1N 2.2 N Shape A (L-Shape) = .075kg Shape B (Triangle) = .25kg Shape C (Square) = .15kg Shape D (Pentagon) = .1kg Shape E (Hexagon) = .075kg 20 cm Tsin(θ) Angle: 45 deg. Fx = 14.1N Fy = 14.1N 1 Macro Increase in tension force = Increase in both horizontal & vertical force Truck: 6,000kg Bridge: 10,000kg 50* stand adj Example: 15 cm 2(Ft)(sinθ)=Mg 2(2.1)(sinθ)=(.35)(9.81) 4.2(sinθ)=3.4335 sinθ=.8175 θ=54.8° Hexagon =.075kg Add girders or harmonic absorbers R + R =16,000 - 5,833.33 = 10,166.7/2 = 5,083.33g How does this relate to real life? How do the angles change when the separation distance changes? amount spring is stretched 2 45 cm 3 F 8N .36kg 1 COMPLETED 3 Ft and angle are inversely related As angle increases, force of tension decreases 3) 8N 4) 7N Fx 60m F = -kx 2(Ft)(sinθ)=Mg sinθ=Fy/Ft Ft=Mg/2(sinθ) Ft(sinθ)=Fy Fy=Mg 50 deg 2 BUT AT 45 degrees: Fx = Fy Try to keep structure stable while removing blocks Different shapes of different sizes are used to make it more difficult to determine which blocks to remove Important to think before making any moves - one wrong move could affect the entire structure 4.6N 4.5N Twister 2 F & x - direct relationship Questions Model 7N spring constant 45* Fy How can we apply these concepts to our bridge? Creating a New Problem the space figure (geometric 3-dimensional figure) is symmetrical balancing point is centered string supports figure in centered point string is ab R = 5,833.33g R = 4,333.33g R = 5,833.33g 2.3 N r Bridge: 172g = .172kg .172 x 9.8 = 1.69N Load: 15lbs/2.2 = 6.8kg 6.8 x 9.8 = 66.8N Model Ratio: 66.8N/1.69N = 39.5 Avg. Force (N) Build a cheap yet efficient bridge that allowed cars to safely pass over it Extra points for trucks Materials: go back to original shape when force is applied Certain point where the material will not go back to the original shape - will shortly break: Young's Modulus Tension Angle WHEN 6 + 8 = 10 100 = 100 Constant velocity, changing angle Measure hypothenuse = 10N g=9.8m/s^2 55 cm R = 5,083.33g R = 5,833.33g R = 5,083.33g 6N 5,833.33 + 4,333.33 + 5,833.33 = 16,000 sin70 = Fy/4.6N --- Fy = 4.3N cos70 = Fx/4.6 ---Fx = 1.6N Fx +Fy = Ft --- 4.3 +1.6 = 4.6 distance from end A R + R = 16,000-4,333.33 = 11,666.7/2 = 5,833.33g 7.7N 20m 19.3N Reaction at each support when truck is... spring force 15 cm Questions: Changing Angles 2 Ft How can we ensure the experimental values are correct? adj F = 6N ; F = 8N opp A Strain Balancing Cans 2 3N length Theoretical Values How can this be prevented? sin50 = Fy/7 --- Fy = 5.4N cos50 = Fx/7 --- Fx = 4.5N Fx + Fy = Ft --- 5.4 + 4.5 = 7 5000kg bridge weight Equations Model Ratio d Tacoma Narrows Bridge 2 sin60 = Fy/5.6 --- Fy = 4.8N cos60 = Fx/5.6 --- Fx = 2.8N Fx +Fy = Ft ---4.8 + 2.8 =5.6 Questions string Calculate θ for different Ft 60 deg. 8N MR = .313 adj string truck weight Fx decreases while Fy increases distance from end A 100g & 250g Put a ruler between two books. Then press down on the middle so that the "beam" bends. Questions: What must be happening to the molecules of the ruler? What are the micro and macro elements? Data Table θ 6N Experiment 1: Bending a Beam Triangle = .25kg Equilibrium Game 8 + 12 = 15 225 = 225 22.9N F = 10sin37 = 6.018N F = 10cos37 = 7.986N L-Shape = .075kg 25* 20N F = 8N ; F = 12N How does velocity affect our values? Why must it be constant? 4000kg 50* 75* Plan 5.6N 20N F 2 2 The Lever Law Resonance 70 deg Ft = 30N Fx = 19.3N Fy = 22.9N What would we do differently? Use a box to insert weights so that they are evenly distributed Add weights quickly so that they are not acting on bridge while waiting to add more Pythagorean Theorem 37* .72kg F Angle = 50 degrees 5.6N MR = .695 F = 20N spring scale What is the relationship between the angle and the force values? 2 60 deg Angle = Consistent opp Angle: 75 deg. Fx = 5.2N Fy = 19.3N 25 cm Ft truck weight 90 deg 22cm high - comfortable for avg. human to pull 14cm wide - average width of hand Mass of suspended weight (350 grams) Height of crossbar

Bridge Construction

Transcript: END sketch of bridge golden gate bridge is the most known bridge in San Francisco we want a triangle bridge because we thought it would be stronger then anything else and its most common design. The famous golden gate bridge as youy can see in the picture its base is a triangle ARCH BRIDGE BEAM BRIDGE Geocentre sticker BY; Madison O'dell an Samantha J due march 6 2017 grade 7 miss ledwell examples * ARCH BRIDGE *SUSPENSION BRIDGE *BEAM BRIDGE measurements width~ 11 length~79 height~10 COMMON BRIDGES what is a bridge IT'S THE END OF THE BRIGE FOR U BUDDY LOL ! MY IDEA The Sydney Harbour Bridge is a steel through arch bridge across Sydney Harbour that carries rail, bicycle, and traffic between the Sydney central business district and the North Shore. An idea of the kind of bridge A bridge is a structure that helps you get over a obstacle like river,valleys or roads. and building a bridge can be very difficult with the measurements and weight. Donghai Bridge is a Chinese bridge counted among the longest cross-sea bridges in the world . crushed bridge Suspension BRIDGE Bridge Construction

Bridge Construction

Transcript: Bridge Construction 2021-2022 A Hands Together Student perished when the flood waters rose too high on her way to school. It became clear a bridge was needed. STEP 1 2020 Early 2021 Holy Family Shipping Container arrives containing food and school supplies STEP 2 STEP 3 Late 2021 Bridge Construction Starts Using the shipping container provided about Family, Hands Together employed over 20 Haitian works to create the bridge. STEP 4 Bridge Construction is Finished Thank you Holy Family! 2022

Bridge Construction

Transcript: It is located in between Shanghai and Nanjing in East China's Jiangsu province. Construction ended in 2010, facts include: The bridge runs roughly parallel to the Yangtze River, about 5 to 50 miles to its south. It passes through the northern edges of population centers (from west to east) beginning in Danyang, Changzhou, Wuxi, Suzhou and ending in Kunshan. There is a 9-kilometre long (5.6 mi) section over open water across Yangcheng Lake in Suzhou. Type Of Bridge By: Johnny Bowers & Mark Gonzalez Date Completed And Facts Location Danyang–Kunshan Grand Bridge: The Longest Bridge In The World Look At Me I'm Brainst-storming Made up of Cable and Rail

Bridge Construction

Transcript: Engineering a Bridge Tension Newtons Newtons Length: 70cm Triangle Trigonometric Calculations Amount of Mass 1400g Triangle is the most rigid 10 straws, 10cm gap The upper part of the ruler is pushed closer together, compression Compression T1 Square Girder Bridge Data Square T2 Bridge Images Straw Bridge Experiment 4: Wooden Girder Bridge Pentagon Experiment: Tension and Compression Experiment 3: Building a Girder Bridge Pentagon Number of Straws 9 The process of complex design Model Ratio 280 Tension 2Tsin(60)-mg=0 Tension=.283N Hexagon The lower part of the ruler is pulled farther apart, tension L-Shape Bridge Image T1 Cost: $168.30 Girder Data T1 T2 N Experiment 2: Testing Girders Experiment 1: Bending a Beam Triangle T2

BRIDGE CONSTRUCTION

Transcript: Wide: 15,5m Construction time: 2years Opened for traffic: 23.10.1989 BRIDGE CONSTRUCTION Presentation of bridges in Ostrava, and Kuokkala Bridge in Jyväskylä, Finland Pauli Lyytinen THANK FOR YOUR ATTENTION Pauli Lyytinen Length: 480m

Bridge Construction

Transcript: Triangle Straw Bridge Construction Square Octagon Kyle Beirne, Paige-Willow Brennan, Erica Lehman Girder Testing Pulling the Brick Bridge Construction Hexagon

Bridge Construction

Transcript: design by Dóri Sirály for Prezi The daily log helped me organize how I built the bridge into steps and it helped me know where I left off. Learning Challenges I learned that constructing bridges isn't an easy job and it requires a lot of hard work as well as time and patience because measurements need to be exact and making sure all the parts fit together is important. Roles The biggest challenge was making the trusses connect with the tie members. I overcame the challenge by sanding and not giving up until it fit. Daily Log I played each role by doing what I needed to do for the bridge. I was the quality assurance manager when I had questions for my bridge, the designer when I needed to design something for the bridge, the communicator when I had to write daily logs and the prezi, the fabrication manager when I had to clean, the fabricator when I had to make sure my bridge is stable. Bridge Construction

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