181 Fremont San Francisco, California

Transcription

1 Images courtesy of Heller Manus Caroline Klatman 181 Fremont San Francisco, California Advisor Dr. Aly Said Structural Option AE Senior Thesis April 13, 2015

2 INTRODUCTION Introduction OVERVIEW Existing Design Proposal and Depth Construction Breadth

3 INTRODUCTION OVERVIEW Construction Nov 2013 Early 2016 Design-Bid-Build $375 Million 563,804 square feet Project Team General Contractor Level 10 Construction Construction Manager Jay Paul Company Owner Jay Paul Company Architect Heller Manus 56 Stories 700 ft tall Image courtesy of Google Maps Structural and MEP Engineer Arup

4 Images courtesy of Heller Manus INTRODUCTION OVERVIEW Transbay Transit Center District Plan N 181 Fremont City Park Bridge

5 INTRODUCTION BACKGROUND ARCHITECTURE STRUCTURE Layout 16 Residential 1 Residential Amenity 1 Mechanical 33 Office Existing Design N Images courtesy of Heller Manus N 4 Units Open Office

6 Images courtesy of Heller Manus INTRODUCTION BACKGROUND ARCHITECTURE STRUCTURE Exterior Aesthetic Tilting Façade Megaframe

7 INTRODUCTION Performance Objective: Performance Objective: BACKGROUND ARCHITECTURE STRUCTURE Seismic Design Seismic Design Category D Moderate damage under 2/3 MCE Superstructure remains elastic Minor Damage to non-structural components T x = 7.2 sec T y = 6.7 sec Method of Compliance: Code Design Level Method of Compliance: REDi Gold

8 INTRODUCTION BOX36x36x2.5-5 Primary BRB BACKGROUND ARCHITECTURE STRUCTURE Megaframe Unclassified by ASCE 7 Back-calculated R = 2.5 N Images courtesy of Heller Manus Secondary BRBs BOX16x1.5-2

9 INTRODUCTION PURPOSE SOLUTION Purpose Pursue a traditional design approach in order to compare to Arup s solution Proposal Solution Design a dual system classified by ASCE 7-10

10 INTRODUCTION Solution PURPOSE SOLUTION A B C A B C Level 37 Image adapted from Arup Lower Level Image adapted from Heller Manus

11 Spectral Response Acceleration, Sa (g) INTRODUCTION Approach Approach Response Spectrum APPROACH DESIGN Response Spectrum Analysis ETABS Design Response Spectrum Scale Factor = 0.85 (I g/r) (V ELF /V MRSA ) X-direction = 109 GRAVITY SYSTEM 0.4 N Period, T (s) Y-direction = 176

12 Story INTRODUCTION Roof Story Shears Approach Base Shear Response Spectrum Analysis 41 APPROACH DESIGN GRAVITY SYSTEM ETABS X-direction 2463 kips in the x-direction 2216 kips in the y-direction N 5 Y-direction Force, kip

13 Story INTRODUCTION Seismic Drift Max Story Displacement Roof X-direction Deflection Behavior APPROACH Seismic Drift 41 DESIGN GRAVITY SYSTEM 20% of story height 23 Multiply actual drift by C D /I 5 Y-direction Displacement, (in)

14 INTRODUCTION APPROACH DESIGN GRAVITY SYSTEM Special Moment Frames Moment Frames up to 473 Seismically Compact Sections Moment Frames Design Building Behavior 25% of Prescribed Seismic Forces 646 kips in the x-direction 554 kips in the y-direction

15 INTRODUCTION Shear Walls APPROACH Shear Walls Outrigger Interaction A C Openings DESIGN GRAVITY SYSTEM Natural placement Minimal impact on floor plan B Need for Openings y x Image adapted from Heller Manus

16 37.5 Story INTRODUCTION Story Shears APPROACH DESIGN GRAVITY SYSTEM Shear Walls Shear Increase From Outriggers A and C are 24 thick Shear Wall B is 18 thick A B C Image adapted from Heller Manus Shear (kips)

17 INTRODUCTION APPROACH DESIGN GRAVITY SYSTEM Traditional Image adapted from Heller Manus Outrigger Design Engages all perimeter columns Maintains clear entryway Minimal impact on floor plan Belt Truss

18 INTRODUCTION Optimization Shear Wall B N APPROACH DESIGN GRAVITY SYSTEM y A B C Shear Walls x A and C

19 Story INTRODUCTION Overturning Moment Without Outriggers Roof With Outriggers Without Outriggers Roof With Outriggers APPROACH DESIGN GRAVITY SYSTEM y A B C 23 Y-direction X-direction Drift 23 Y-direction X-direction x Moment, (1000 kip-ft) Displacement, (in)

20 Images adapted from Heller Manus INTRODUCTION Impact on Gravity System APPROACH DESIGN GRAVITY SYSTEM

21 Images adapted from Heller Manus INTRODUCTION APPROACH DESIGN GRAVITY SYSTEM Floor Framing Transfer of shear from diaphragm A B C

22 Images adapted from Heller Manus INTRODUCTION Vs Systems Comparison Existing New Design Withstands 475-year return period earthquake Withstands 2/3 MCE defined by ASCE 7-10 Just over $9 million Just under $7 million Added design time and cost due to Peer Review Additional floor framing to transfer shear to shear wall

23 INTRODUCTION COST CONSTRUCTABILITY Cost Construction Breadth Mega-frame façade cost New façade cost Façade Cost Cost Curtainwall $21,185,680 Concrete Shear Walls $6,889,365 Total Cost $28,075,045 Additional Cost of Mega-frame Cost Mega-Cladding $2,177,244 Mega-Braces $4,371,542 Connections $4,965,056 Total Cost $32,699,522 Image courtesy of Heller Manus Total Additional: $4,624,477

24 Image courtesy of Arup INTRODUCTION COST CONSTRUCTABILITY Constructability Megaframe complex connections delayed schedule specialty contractor Shear Walls cure time gravity-only columns hydraulic form system

25 Images adapted from Heller Manus INTRODUCTION Vs Conclusions Existing Superior Performance New Design Significant cost savings

26 Acknowledgements Amy Graver and Craig Allender from Simpson Gumpertz & Heger for generously donating their time to obtain a thesis building as well as necessary project drawings and information. Mr. Bob McNamara for his consultations and advice. Dr. Aly Said and Dr. Thomas Boothby for their guidance as my faculty advisors. Dana Burzo for her patient assistance in helping me understand the constructability issues and schedule impacts involved in this thesis. Jay Paul Company for permission to use 181 Fremont as my thesis building.

27 APPENDICES REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE INTRODUCTION Appendices

28 APPENDICES Appendices REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE Shear wall reinforcing: Typical Shear Outrigger Shear Typical Flexural Outrigger Flexural Shear Wall B #7 s at 12 EF #10 s at 10 EF #7 s at 12 EF #7 s at 12 EF A #7 s at 10 EF #10 s at 8 EF #10 s at 4 EF #10 s at 8 EF C #7 s at 10 EF #10 s at 8 EF #10 s at 4 EF #10 s at 8 EF

29 Images courtesy of Heller Manus APPENDICES REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE

30 Images courtesy of Heller Manus APPENDICES REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE 40 52

31 APPENDICES REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE Appendices CSI Division Item Pricing Method Quantity Material Installation Total Total Cost B Tubular Aluminum Framing thermal break frame cost/s.f. opening B Curtain Wall Panels " thick IGU cost/s.f Sandwich Panel cost/s.f Curtain Wall and Glazed Assemblies 50 Average, single glazed H SF Total Curtainwall:

32 APPENDICES REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE Appendices Item Crew Daily Output Labor-Hours Unit Quantity Material Labor Equipment Total Total Incl O&P Total Cost Mega-cladding Metal Furring Beams and Columns, 7/8" channels, 12" oc 1 Lath SF Weather Barriers Building wrap 2 Carp SF Column Covers " diameter, aluminum 2Sswk VLF Gypsum Board Panels On beams, columns, or soffits 2 Carp SF Foam Board Insulation " thick 1 Carp SF Framing, Boxed Headers/Beams Double, 18 ga. X 6" deep 2 carp LF Total Mega-Cladding:

33 APPENDICES REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE Appendices Item Crew Daily Output Labor-Hours Unit Quantity Material Labor Equipment Total Total Incl O&P Mega-Braces Structural Steel for Buildings 4900 Heavy Sections, Moment connections E ton Braces E EA W14x342 E LF Connections Vibration and Bearing Pads Mounts, neoprene 1 Sswk EA Columns, Structural Structural tubing E Lb W12x35 E LF Plates SF Welding Steel Passes E LF Structural Steel for Buildings Heavy Sections, Moment connections E ton Mega-Brace Total: Overall Total:

34 APPENDICES REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE Appendices Item Amount Unit Material Unit Price Labor Unit Price Total Cost Duration Rounded Crew SFCA $ Formwork $ $ 2,773, C-2 Concrete CY $ $ $ 3,744, ton $ Rebar- #8's $ $ 371, Rodmen Total Cost $ 6,889,364.61

35 Images courtesy of and adapted from Heller Manus APPENDICES REINFORCING COST ESTIMATE FLOOR PLANS FAÇADE Appendices