Tyler Strange Fraser Centre State College PA Tyler

Tyler Strange Fraser Centre State College, PA Tyler Strange Structural Option Fraser Centre Structural Option Consultant: Dr. Thomas Boothby April 13, 2011 Dr. Thomas Boothby April 13 th, 2011

Presentation Outline § § Fraser Centre § § State College, PA Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011

Presentation Outline Introduction to Fraser Centre General Information • 11 story mixed-use building • Location…………. . . State College, PA Fraser Street and Beaver Ave Ø First story is parking Ø Second story is parking and retail • Size……………. . 230, 000 sf • Project Cost…………………Unreleased Ø Third story is a theatre § § Ø Fourth story is MEP • Project Team - Architect……. ……………. . Wallace Roberts & Todd, LLC - General Contractor………Leonard S. Fiore, Inc. - Structural Engineer………David Chou & Associates, Inc. Tyler Strange § § Structural Option Ø Fifth-tenth stories are residential Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion Ø Eleventh story is suites Fraser Centre Dr. Thomas Boothby April 13 th, 2011

Presentation Outline Existing System Floor System § § • Two-way 12 inch flat slab Columns • Columns vary in size from 16 in x 32 in to 16 in x 72 in • Spans range from 28. 5 ft to 40 ft § § Shear Walls • 4 shear walls located on the residential floors • Shear walls on the lower floors vary from 4 to 10 Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011

Presentation Outline Proposal Depth Proposal • Change the floor system to composite concrete and steel beams for the residential levels § § Current Shear Wall Layout • Redesign the residential shear walls with a new layout Breadth Proposal • Analyze the change in cost and schedule of the new floor system • Analyze the impact the new shear wall layout will have on the architecture Tyler Strange Structural Option § § Proposed Shear Wall Layout Fraser Centre Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011

Presentation Outline Composite Floor Steel Deck: 3 VLI Deck 18 Gage B 1: W 12 x 16 Codes: § § • Original design code used ASCE 7 -05 • New design code used ASCE 7 -10 B 2: W 10 x 12 Material Strengths: G 1: W 18 x 76 • Concrete: 4000 psi G 2: W 16 x 31 C 1: Welded/Bolted Single Angle L 4 x 3 x 3/8 C 2: Bolted/Bolted Double Angle L 4 x 3 x 3/8 • Steel: § § 50000 psi Load Combinations • 1. 2 Dead +1. 6 Live Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion • 1. 4 Dead Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby April 13 th, 2011

Presentation Outline Composite Floor Deflection Check: Steel Deck: 3 VLI Deck 18 Gage § § • Limited to L/360 B 1: W 12 x 16 B 2: W 10 x 12 Results: G 1: W 18 x 76 • 3 in 18 gage VLI steel deck was used G 2: W 16 x 31 C 1: Welded/Bolted Single Angle L 4 x 3 x 3/8 C 2: Bolted/Bolted Double Angle Tyler Strange L 4 x 3 x 3/ 8 Structural Option § § • 4. 5 in of concrete was used to achieve 2 hr fire rating • W Shapes range from W 10 x 12 to W 18 x 76 • Thickness of residential floor system was increased by 12 in Fraser Centre Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011

Presentation Outline Steel Connections Steel Deck: 3 VLI Deck 18 Gage Design: • AISC Table 10 -11 B 1: W 12 x 16 • Girder to Beam is welded/bolted for constructability B 2: W 10 x 12 • Shear Wall to Girder is bolted/bolted for economics G 1: W 18 x 76 § § Results: G 2: W 16 x 31 • Girder/Beam connection: • Shear Wall/Girder connection: C 1: Welded/Bolted Single Angle L 4 x 3 x 3/8 • Welded/Bolted Single Angle • Bolted/Bolted Double Angle C 2: Bolted/Bolted Double Angle L 4 x 3 x 1/4 • L 4 x 3 x 3/8 • L 4 x 3 x 1/4 • 3/16 th weld • Three A 325 N ¾” dia. bolts § § Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion • Two A 325 N ¾” dia. bolts Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby April 13 th, 2011

Presentation Outline Schedule and Cost Analysis Schedule Analysis § § • Current system takes 24 days to complete a single floor with slight overlap. • Alternative system takes 10 days to complete a single floor with a linear progression. Tyler Strange Structural Option Fraser Centre § § Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011

Presentation Outline Schedule and Cost Analysis Description In Place Forms 2, 212, 344 In Place Reinforcing 3, 432 4 ksi Ready Mix 60, 492 Placing Concrete 37, 658 Cost of Current System Tyler Strange Cost Estimate 2, 313, 926 Cost Estimate Struct. Steel W 16 x 31 260, 361 Struct. Steel W 18 x 76 829, 142 Struct. Steel W 10 x 12 74, 389 Struct. Steel W 12 x 16 333, 575 Metal Decking Total Structural Option § § 5, 450, 667 Weld Shear Conn 66, 410 4 ksi Ready Mix 20, 235 Placing Concrete 12, 597 Cost of Alternative System 7, 047, 374 Fraser Centre § § Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion Total Dr. Thomas Boothby April 13 th, 2011

Presentation Outline Lateral System Redesign Initial Shear Wall Layout § § • Discontinuous between parking levels, theater level, and residential levels • Architectural restraints on position and size Proposed Shear Wall Layout § § • Continuous from theater level to residential levels • Number of shear walls is increased from four to seven • Shear walls are reduced in size Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011

Presentation Outline Lateral System Redesign Shear Wall Design Calculations 3 D ETABS Model • Flexural Reinforcement Design § § • Shear walls modeled in ETABS • Shear Reinforcement Design • Capacity Check • ETABS used to design shear walls and then checked to design by hand • ACI Chapter 11 § § • Controlling Load Case: • Minimum Reinforcements Governed • 1. 54 D+1. 65 E Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion • Spacing Limitations Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby April 13 th, 2011

Presentation Outline Architectural Analysis 5 th Floor-10 th Floor § § § § Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011

Presentation Outline Architectural Analysis 5 th Floor-10 th Floor § § § § Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion Largest impact on architecture occurs in Unit 3 C Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby April 13 th, 2011

Presentation Outline Architectural Analysis 11 th Floor § § § § Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011

Presentation Outline Architectural Analysis 11 th Floor § § § § Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion Living room width is reduced by 14” Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby April 13 th, 2011

Presentation Outline Architectural Analysis 11 th Floor § § § § Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion Bedroom width is reduced by 14” Tyler Strange Structural Option Fraser Centre Dr. Thomas Boothby April 13 th, 2011

Presentation Outline Conclusion Building Weight: • Existing System: • Proposed System: • 7, 000 kip reduction Cost: • Existing System: $2. 3 million/residential floor • Proposed System: $7. 0 million/residential floor • Three times more expensive 72, 000 kips 65, 000 kips Architectural Impact: • Largest impact on floors 5 -10 is shortening a single room by roughly 14”. • Largest impact on the 11 th floor is shortening the living room by 14 “. Tyler Strange § § Structural Option Schedule: • Existing System: 24 days/residential floor • Proposed System: 10 days/residential floor • Gain 98 work days for all seven residential floors Fraser Centre § § Dr. Thomas Boothby Introduction Existing System Proposal Gravity System Redesign Ø Composite Floor Ø Steel Connections Schedule and Cost Analysis Lateral System Redesign Architectural Analysis Conclusion April 13 th, 2011