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CONCRETE CORE WALL

DRIVEN PILE FOUNDATION

AEI STUDENT COMPETITION STRUCTURAL- I

Due to the high risk of flooding in the Boston area, measures had to be taken to prevent water from damcritical systems or merchandise in the building. The FloodBreak floodgate is a passive flood protection system

around the exposed perimeter of 888 Boylston Street that can hold back up to 3ft. of water. The floodgate is normwith the surrounding walkways but will automatically rise up to 90 based on the amount of water it detects. Thdoes not require any power or human interaction to work, making it ideal for improving the resiliency of our

However, if water does manage to reach our building, all of the critical electrical and mechanical componebeen moved from the underground garage to a new oor ve stories above ground. The reduced oor-to oor hduced by the Bubbledeck system, allowed us to add in this additional oor without increasing the overall height of the

1,566,136 ft3of concrete96.79 ft3reduction in CO

2emissions

$4,640,403saved in slab structures

RenewableEnergy Type

ModelEnergy Production

kWh/ month

WIND UGE-9M 127,461

SOLAR E-SERIES 64,234

As a result of the limitations evoked by the neighbor-uildings, a drilled shaft foundation system was selectedpport the building. Other methods of installation haveer potential to cause large vibrations in the ground andhave damaged the foundations of the surrounding build-

or the portion of the I-90 tunnel that runs underneath theng. A total of 40 drilled shafts are required to supportads of the building. 80% of which have a 6 diameterthe other 20% have an 8 diameter as determined byading demands. The total shaft capacity is based on the

wing equations using data from the geotechnical report.

otal Capacity=Bearing Capacity+Skin Friction CapacityBearing Capacity=Area of Shaft*End Bearing

n Friction Capacity=Shaft Circumference*Total BearingDepth*Skin Friction

End bearing 5ft intocompetent bedrock*

100ksf Skin friction in weatheredand competent bedrock**

14.4 ksf

*Cannot exceed50% design capacity

**5 in bedrock+assumeddepth in weathered bedrock

Depth incompetent Bedrock

5 ftAssumed depth incompetent bedrock

2.5 ft

ear Wall Footprint

Reinforcement Design for the Shear Wall

12-inch reinforced concrete shear wallUsed ACI-318 Code

The slab structure of 888 Boylston adopts the highly inno-ve solution of Bubbledeck slab. The bubbledeck slab replacesconcrete between the tension and compression regions in the-critic areas with high density polyethleyene hollow bubbles. Us-of these bubbles leads to decrase in concrete volume in the slab,, and carbon dioxide emmision during the cement productioness.

With the help of Autodesk Robot Structural Analysis software,regions that have to be considered as solid c oncrete slab were de-

mined. All the bubbles were placed according to the specicationsvided by Bubbledeck company. The structure of the bubbledeckwed us to integrate MEP systems into the slab structure withouteasing the oor-to-oor height.

in % of asolid deck

Bubbledeck vs. solid deck

Samestrength

Samebendingstiffness

Sameconcretevolume

Strength 100 105 150BendingStiffness

87 100 300

VolumeofConcrete

66 69 100

Typical Ofce Floor Bubbledeck Layout

Bubbledeck Slab Section View

FloodWall Section View

Typical Bubbledeck SectionDesign Considerations:

- Modular

- Applicable for high-rise building

- Efcient installation

The team selected a unitized curtain wall sys-tem and designed the connection to the Bubble-deck slab.

Typical Building Envelope Section

888 Boylston Stremany sustainable fehelp lowering the enand waste productio

- Solar panels- Wind turbines- Anaerobic digesters- High efciency wat- LED light xtures- Community garden- Bike sharing

ABSTRACTThis project is based on the 2016 Architectural Engineering Institute Student Design Competition.The proposal is a new structural design for the building that is being constructed on 888 BoylstonStreet, Boston. With the help of software tools and various design methods, the team workedon designing the architectural, structural, and integrated systems of a LEED certied buildingwith a near net zero output of energy, emission, water, and waste. The project addresses theengineering challenges involved in highrise building design, specically through the use of aconcrete slab structure called Bubbledeck, as well as construction planning, energy efciency,adaptability, and resiliency.

OBJECTIVES:- Achieve a structural design that successfully integrates the structural, mechanical, and electricalelements with the architectural systems in order to create an integrated design.

- Select design and construction methods that minimize the disturbances to neighboring build-ings and the Massachusetts Turnpike.

- Design every aspect of the building sustainably.

- Design all aspects of the building, including the building envelope, to contribute to an overallbuilding energy usage that is at least 50% below ASHRAE requirements.

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FACADE DESIGN

RESILIENCY

SUSTAINABILITY FEATURESBUBBLEDECK SLAB SYSTEMS

A B C

Facade Panel Types

The facade of the building has three dpanel designs, altering due to their fuA: Panels with deattachable shadow bo

40% of the building is covered wow panels with R value of 50 in meet with the energy savings crdecided by the team.

B: Panels with shading devices: The panels that do not have an

shadow box includes a shading that is controlled by the dayligh

C: Air intake panels: On each oor, two panels are sw

with air intake grillls as fresh ai

Caroline Bartlett & Andrea Goldstein & Ali YalazAdvisors: Leonard D. Albano & Lef E. Cewe-Malloy

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888 BOYLSTON

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BASELINE

DESIGN

GALLONS/YEAR

YEARLY WATER USAGE