InfiniBridge

∞Project Leaders:

Zac Ostrom

Tyler Ogle

Barrett Lee

Nicole Claros

Jacob Ogle

Boone Pickens Engineering, 1111 E. WinterPark Dr.

Stillwater OK, 74074

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Table of Contents

0. Teams/Schedule0.1 Schedule

1. Objective Summary2. Design Summary3. Variable Path Length

3.1 Path Selection Goal3.1.1 Table of Path Options3.1.2 Picture (Birdseye Path)

4. Ramp Design4.1 ADA 405.2

4.1.1 Design of Ramps5. Safety

5.1 Railing5.2 Vehicle Restriction Posts

6. Unobstruction of Lake6.1 10x100ft Passage Goal

6.1.1 Picture (Arms/Path/Surface)7. Load Bearing

7.1 Supports Load 85PSF7.1.1 “HovenRing” Comparison

8. Walkway Width8.1 Path Design

9. 2D Site Layout10. FEA Analysis

10.1 Design Improvments11. Component Drawings

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0.0 – Key Personel

The reliability of decisions and area of responsibility is exemplified in the different subgroups of our team. The 3D Modeling Subcontractors, who are experienced in Solidworks, are in charge of designing the bridge onto the Solidworks program. The first 3D modeling group consisted of team members: Maxwell Neimeyer, Jacob Bertrand, Rodolfo Sandoval, Misael Mantoya, and Bret Bluma, who designed the pathways and the railings on our monumental bridge. The second Solidworks team designed the arms of the bridge, wind turbines, pile-ons, and cables. This team consisted of: Will Shwartz, Kristen Mckinney, Derek Morales, Alex Garrison, and Brandon Bos. The scope and complexity of their work is met by their experience. In order to comply with safety requirements of the bridge, the significance of the construction, manufacturing, delivery and safety of the bridge is essential. Our Construction and Safety group includes: TJ Hardimon, Bryce Hurst, Nic Imel, Darian Johns, and Kerbaugh Jake. This team is assigned to complete safety requirements, manufacturing components and techniques.Our site layout is provided by our Autocad team: Kate Bernhardt, Claire Van Beek, Carly Reeves, Natalie Hickerson, and Blaine Hufnagel. This team, experienced in AutoCad, maps out the bridge onto a map of Boomer Lake, giving other teams a basic layout of the bridge and its location in the City of Stillwater.

0.1 Schedule

Meeting Dates

3D Modeling #1Tasks

3D Modeling #2Tasks

CMSTasks

2D LayoutTasks

November 10 Bridge PathRailing

PylonsSupport Arms

X Path and Pylon mapping

November 17 Ramps/Anchors Cables/Cable Mounts

X Ramps and Support Arms mapping

November 22 Report Report X Report

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1.0 – Objective Summary

Our objective was to design an iconic, landmark, bridge to connect the peninsulas of Boomer Lake while allowing a varied combination of path lengths around the lake. We needed a bridge that would give Stillwater residents an aesthetically pleasing monument, while also proving useful to a broader range of people that seek various exercise distances. We wanted the design to be unique and cutting edge while still meeting the various safety constraints. We believe our design meets and exceeds these objectives.

2.0 – Design Summary

Our Bridge is of circular suspension bridge design, however it is like no other before it. Instead of a typical set of straight bridges with many pylons to support it, we made our bridge in the shape of a distorted “S” with ramps connecting to each peninsula. Only two large pylons, with steel arms protruding out to the path, are above the water; thus there are virtually no obstructions to boats while offering a very pleasing and unique design. The bridge also harnesses its own energy to reduce its carbon footprint.

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3.0 – Variable Path Length3.1 Path Selection GoalOur goal was to provide multiple options for residents wishing to exercise at the Boomer Lake running path. Currently, Boomer Lake only offers one path, a 5k (~3.1 miles) circuit. With our bridge design, residents will have a multitude of options ranging from 0.5 miles to the full 3.1 miles, as well as any combination of these paths. For example, someone wanting to run 5 miles could run the full circuit as well as our 2 mile option. The combinations available to runners are virtually endless.

3.1.1 Path Options

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Path Color Distance

(km)

Distance

(miles)

#1 Red 1.9 1.2

#2 Yellow 3.4 2.1

Existing

Path

x 5.0 3.1

Bridge Black 0.8

(one-way)

0.5

(one-way)

4.0 – Ramp Design4.1 ADA 405.2

- “Ramp runs shall have a running slope not steeper than 1:12”

4.1.1 Ramp DesignOur path is elevated 32 feet above the water surface, meaning this is the maximum rise our ramps will need to cover. Depending upon the elevation of the land on each peninsula the rise height could be smaller. However for a slope not steeper than 1:12 at 32 feet high, our max run of the ramp would then be 384 feet. Each ramp has the same distance run.

5.0 – Safety5.1 Railing

Our rails are designed to be aesthetically pleasing as well as functional and safe. The circular shape of the bike rub rail is designed to protect bikers hand in the event of a collision with rail. The center of the circular rub bar is 41 inches above the path, with the radius of 2.5 inches, the rub bar covers between 38.5 and 43.5 inches. The vertical posts are placed 12 inches apart from each other with smaller slats between them (satisfying UBC-509).

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5.2 Vehicle Barriers

To restrict access to the bridge we decided to place barriers, which permit bicycles and pedestrians access, at the beginning of each ramp. These are the same height as the posts on campus. The posts on campus were 81 inches apart from each other. This meant we only need one barrier to split the path. These barriers will be reinforced with a bar going into the ground to prevent even the most determined of vehicles from gaining access.

6.0 – Obstruction to Boats6.1 10x100ft Passage GoalThe design required an unobstructed area at least 10 feet above the water that was at least 100 feet wide for boats to pass under. Our design makes the pylons with the arms the only obstruction for boats. The path is 30 feet above the water; the arms begin at water level and slowly curve upwards to meet the path. There is an area near the pylons that will not have 10 feet of clearance; however the way the arms are positioned there are multiple pathways for boats to travel under the bridge with plenty of room (10x100ft area).

6.1.1 Boat Path Options

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7.0 – Load Bearing7.1 Supports Load of 85 PSFIn our FEA testing we used .59 PSI which converts to 85 PSF, as the pressure load on the pathway and ramps. This was the requirement given in the RFP.

7.1.1 “HovenRing”We based our structural design on the HovenRing bridge in the Netherlands. This is the only circular suspension bridge currently in existence. Similar to the HovenRing, our design uses central pylons, cables, and anchors to support the curved pathway. However our bridge is much larger and has not only one arc but two arcs that are both larger in diameter than the HovenRing. Instead of using counterweights to balance the path we used large titanium support arms. This helps bear load while also preventing the pathway from warping.

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8.0 – Walkway WidthThe walkway path we created was 10 feet wide throughout the entire path length. This satisfied the requirement in the RFP. We then added 2 feet to each side for railing and cable connections. Underneath the path shell we also included areas to connect the support arms.

8.1 Path DesignWe used two semi-circles to create an appealing S shape which runs to four of the peninsulas; this created a wide variety of path options and bridge access points. The path is made of a solid titanium shell which would be coated on the walking path with a non-slip rubber coating similar to a running track. This would help absorb shock on the runner’s feet.

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9.0 – 2D Site Layout

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10.0 – FEA Analysis

See attached.

10.1 Design Improvements

Although our FEA analysis showed failure of the bridge; we believe that a few simple changes would make the bridge structurally sound. These changes would include:

- Changing the thickness or structural shape of the support arms, as well as adding cables to the support arms.

- Using thicker gauged cables, as well as more cables to support the path.

- Adding more anchor points into the water to the ramps and throughout the path.

11.0 – Component Drawings

See attached.

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