hy-vee arena renovation for a future program · 2020-03-23 · hy-vee arena –renovation for a...

Hy-Vee Arena – Renovation for a Future Program

J. Gregory Litterick, PE

Vice President

65th Annual Structural Engineering Conference – Lawrence, KS

March 5, 2020

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Team Work

Owner: Foutch Brothers

Architect: Foutch Brothers

MEP: Henderson Engineers

Structural: Thornton Tomasetti

Contractor: McCownGordon Construction

Steel Fabricator: Schuff Steel


Team Work

Thornton Tomasetti Scope of Service

• Structural engineering

• Vibration analysis

• Tekla mill order model

• Steel connection design



Cost: $28M + $1.00 (more on this later)

Materials:

Elevated Floor:

• Composite steel beams

• Long-span trusses

• Steel columns and braces

Foundation

• Auger cast piles

Mezzanine

• Composite steel

Corner Offices

• Existing steel with added studs for composite action


But First, Some History

Kemper Arena

• Built in 1973-74 for a cost of $22M ($141M in 2019)

• One of Helmut Jahn’s first exposed skeleton structure

• Roof is supported independent of the Bowl Structure

• Hosted the 1976 Republican Convention

• Was home for numerous professional sports teams

• Kansas City Scouts (NHL)

• Kansas City Kings (NBA)

• Kansas City Comets (MISL)

• Many other events from basketball to rodeo to concerts to truck pulls

• 1988 Danny and Miracles (NCAA)


Kemper Arena

• June 4, 1979

• Partial Roof Collapse – no injuries

• 24 hours prior, AIA Convention was held

• I was there the week before at a truck pulling competition with my

Dad.

• Why?

• Ponding water, pushed around by wind

• Bolt fatigue/fracture

• Bolts were not fully tightened due to presence of thermal break

material.


Roof was quickly rebuilt.

1997 Remodel

• New front entry, glass atrium

• Bowl on east side was increased, adding 2000 seats

• Maximum capacity was 19,500

• Roof was reconfigured to support identical upgrade to west

• Cost: $23M

2007 Sprint Center opens, rendering Kemper obsolete

Upkeep on Kemper cost KCMO approximately $1M per year


2016 New Life for an Ageing Arena

Foutch Brothers purchased Kemper from KCMO for $1.00

Agreement included at least $25M in upgrades

The goal:

• Respect the Past. Build the Future – Foutch Brothers

• Transform an obsolete arena into a Youth and Amateur Sports

Venue.

But How?


Arena Transformation:

Add a new sports floor located at the bottom of the upper deck.

• Clear span existing event floor

• More than doubles playing surface

Provide amenities for teams, businesses, and parents

• Remodel suites to Team Rooms, Pop-Up Business Locations

• Restaurant, Bar

• Iconic office spaces at the old mechanical spaces

• Incubator spaces

Training facilities

• 350 meter, 5 lane indoor track around top of upper deck

• Locker rooms, work out equipment


Foundations: Auger Cast Piles - Tested in Place


8 - W14 Columns with HSS Braces

2 columns in the bowl each end

R=3, no wind, notional loads


New Floor at bottom of Upper Deck


New Elevated Floor

Configuration

• Series of Long Span trusses with infill beams

• Perimeter overhangs the lower bowl

• Minimize sight-line obstructions

• Maintain 25’ clear to base of structure

• Architect wanted higher volume over courts

Solution

• Let the trusses follow the court outlines


300’-0”1

90

’-0

”


Trusses are made of W14s. Largest top chord is W14x605


350 meter Indoor Track

Track is located at the top of the original bowl

Track is over-built with the stadia units still in place

Posts sit on rakers, beams span posts to posts, concrete deck

Track surface is Mondo, which is a competition track overlay

5 Lanes

Run in any weather on a professional surface.


Vibrations

• Steady state

• Dynamic

Why should it be reviewed?

• Occupancy comfort

What is the criteria?

• AISC Design Guide 11 doesn’t really cover sports floors

• Aerobics? Dancing? Weight Lifting? Walking?


How did we know that we should review for vibration?

Natural Frequency

• The structural natural frequency wants to be greater than 2.5 Hz

• Combined frequencies, such as raker and precast, need to be

higher.

• Our Floor natural frequency = 2.5 Hz

A rigorous solution is required.


Basis of Design

• SAP analysis model – Two Models Required

• One for strength and design

• One for vibrations

• What are the differences

• Design model has no concrete element or membrane

• Utilize dummy members for lateral

• Vibration model has a shell element for the concrete

• Vibration model, all connections are fixed

• Vibration model, top of beams set at bottom of floor shell


Design Model Extruded Vibration Model Extruded

Tops of Beams AlignCenterlines of Beams Align

Shell ElementsDummy Elements


Basis of Design

• SAP Model for Vibration

• Subjected to Group Movements

• Develop forcing functions to mimic activity

• Conservative that all members are in step

• Map Floor for vertical accelerations


Upper Floor Basketball Layout


Vibrations due to Court 1

PATH



PATH

PATH



PATH


So, you’re saying there’s a chance…


Dance Team at Center


OK, what should we do?

1. Panic

2. Say nothing and blame the painting of the court outline

3. Engage the Architect/Owner

3


OK, what should we do?

3. Engage the Architect/Owner

• Ways to Mitigate

• Cost to make structure stiffer

• Cost of mass tuned dampers

• Cost of doing nothing

• Cost of operational constraints


Solution:

1. Operational Constraints

• Limit cheer/dance/aerobics over the top of columns

• Do not allow at the center, or at the edges

2. Design Structure to Support Tuned Mass Dampers

• Structure can support added weight

• Install dampers in the future if required


Dance Team Over the Columns


Outcome for Vibration Mitigation

To date, the operational constraints have limited issues.

• Some complaints, but mostly due to not setting up in the

correct locations

• No complaints for volleyball, basketball, or pickelball


Re-purposed Rooms

• Existing MEP Rooms are located at the top of the bowl at the corners.

• New Mechanical equipment is more efficient, and occupancy load is

less

• Not all the original space is required for MEP

New offices were provided at the Northwest corner.

Track Lobby was provided at the Southwest corner.


Re-purposed Rooms

• Existing MEP Rooms were steel beams with grating

• Removed grating, installed new deck, added supplemental beams as

needed.

• Set deck and installed headed studs on beams

• Concrete was placed and several new windows were cut into the

façade.


Final Words

• Team Work with all disciplines

• Respect the History and Build the Future

• Convey operational needs

• Basketball was the most important sport for the design of the

floor depth

• Vibration Mitigation


Special Thanks to:

University of Kansas

Foutch Brothers

Henderson Engineers

McCownGordon Construction

TT Team

www.ThorntonTomasetti.com

hy-vee arena renovation for a future program · 2020-03-23 · hy-vee arena –renovation for a...

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