4/16/2008 The Presentation � Building Overview � Thesis Proposal � Structural Analysis � Structural Analysis � The Floor System � The Lateral System � Architectural Breadth � CM Breadth NA NATHAN NA NATHAN AN E. AN E. E. REY E. REY REYNOLDS REYNOLDS OLDS OLDS AD ADVISOR: M. ADVI VISOR: M M. KEVI M. KEV KEVIN P VIN P N PARF PARFITT RFITT � Conclusions ST STRUCTUR STRU RUCTURAL O URAL AL OPT OPTION OPTION ON THE PENNSYLVANIA THE PENNSYLVANI NIA ST NIA S STATE U STATE U E UNIVER UNIVERSIT ERSITY SITY APRI APRI RIL 1 RIL 1 L 15, L 15, , 2008 , 2008 2008 2008 ARCHITECTURAL ENG ARCHITECTURAL ENG ENGINE ENGINE NEER NEER ERING ERING G G The Building The Building � Architecture � Structure � 1970’s Era Law School � Steel Moment Frame Construction � 90,000 SF Addition � 1 Bay Clearspan � Classroom Space � Geopier Foundation Stabilization � Office Space 2 Stories � Construction � 4 Phases 5 Stories � Minimal Interruption � 2 Year Construction The Proposal The Proposal � Structural Study � Breadth Studies � Floor System Analysis � Architecture ○ Composite Steel Joists (CJ-Series) ○ Floor Plans � Lateral System Analysis y y ○ Elevations ○ Braced Frame or Shear Wall Design � Construction Management ○ Cost Estimate ○ Project Schedule 1
4/16/2008 The Structure The Structure � Floor System Considerations � Strength Analysis � Large Open Spans � Designed using SJI Standard Specs � Maintain Existing Depth (31”) � Spacing: 5’ O.C. � Strength Design � Non-Composite Dead Load: 270 PLF Non Composite Dead Load: 270 PLF � Vibration Characteristics � Vibration Characteristics � Live Load: 600 PLF � Total Load: 1150 PLF � Preliminary Design: 26CJ 1150/600/270 The Structure The Structure � Vibration Analysis � Spacing: 5’ O.C. � Damping Coefficient: 0.03 ○ First Floor Classrooms s oo C ass oo s � Natural Frequency: 3.96 Hz � Peak Acceleration: 0.0041g < 0.005g � Final Design: 26CJ 1600/775/270 ○ (46) ¾” Shear Studs ○ Larger than Required by Strength Existing Floor System Proposed Floor System The Structure The Structure � Lateral System Considerations � Classroom Layout � Drift Requirements � Member Properties Member Properties Existing Floor System Proposed Floor System 2
4/16/2008 The Structure The Structure � North-South Lateral System � North-South Braced Frame � Shear Wall � Eccentric Chevron Brace ○ Impractical Coordination of Trades ○ First Floor � Diagonal Bracing ○ Span Length Issues (55 ft) � HSS9x7x1/2” � Knee Bracing ○ Upper Floors ○ Excessive First Floor Drift � HSS8x6x1/2” � Chevron Bracing � 3 Braces Required ○ Architectural Interruption � Increased Column Size � Classroom Corridor � Eccentric Chevron Bracing ○ W14x109 ○ Minimal Complications � Drift: 0.88 inches The Structure The Structure � East-West Braced Frame � Typical Bracing Connections � Diagonal Bracing ○ HSS8x6x1/2” Typical Chevron � Typical Column Size yp Brace ○ W14x82 � Drift: 0.43 inches Typical Diagonal Brace The Structure The Architecture � Additional Structural Considerations � Revised First Floor Plan � Foundations ○ Geopier Stabilization Remains Necessary ○ Not Significantly Modified � Beams � Beams ○ W21x50 � (44) ¾” Shear Studs � Columns Maintain Existing Corridor ○ Sized for Gravity Load Only � W14x82 Revised Classroom Layout Service Area Service Area ○ Existing Design Sized for Drift � W14x159 3
4/16/2008 The Architecture The Architecture � Revised Classroom Space � South Elevation The Architecture The Construction � North Elevation � 4 Phase Construction ○ Phase I (Structure/Sitework) � 1 Year Duration ○ Minimize Impact on Classes ○ Existing Overall Project Schedule The Construction The Construction Existing System Proposed System � Total Cost: $1.44m � Total Cost: $1.31m � Time: 21 Weeks � Time: 20 Weeks � Benefits: � Benefits: � Less Members � Time � No Deck Fireproofing � Cost 4
4/16/2008 The Conclusions The Conclusions � Proposed Floor System � Recommendations � Negligible Effect on Construction Process � Implement Revised Lateral System � Proposed Lateral System ○ Structural Engineer Involved in Schematic Design Process � Beneficial to Overall Construction Process � Beneficial to Overall Construction Process � Maintain Existing Floor System � Proposed Architectural Plan ○ Less Members, Equal Cost � More Aesthetically Pleasing Façade � Utilize Revised Architectural Elevations 5
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