Rockville, MD Advisor: Dr. Andrés Lepage Jacob Wiest || Structural Option JUDICIAL CENTER ANNEX
Building Overview Site Map Judicial Center Annex • Annex to existing Judicial Center • Building Overview • Located in Rockville, MD • Existing Structural System • 210,000 sq ft • Proposal • Timeline: April 2011 to April 2013 • Structural Depth Phase 1 • Total Project Cost $88 Million • CM Breadth • $67 Million on Annex • Structural Depth Phase 2 • Max Height: 114’ • Sustainability Breadth • LEED Gold • Questions/Comments • Design-Bid-Build
Project Team Site Map Judicial Center Annex • Owner: Montgomery County Circuit • Building Overview Court • Existing Structural System • AECOM • Proposal • Architecture • Structural Depth Phase 1 • Structural • CM Breadth • MEP/FP • Structural Depth Phase 2 • Contractor: Tompkins Builders, Inc. • Sustainability Breadth • Civil Engineer: Adtek Engineers • Questions/Comments
Architecture Building Elevations Judicial Center Annex • Building Envelope • Lanterns • Building Overview • Precast • Existing Structural System • Aluminum Panels • Proposal • Glazing • Structural Depth Phase 1 • CM Breadth • Structural Depth Phase 2 • Sustainability Breadth • Questions/Comments
Existing Structure Typical Framing Judicial Center Annex N • Foundations • Building Overview • Cast – In – Place Drilled Piers • Existing Structural System • Framing • Proposal • Post-tensioned Slab with Wide-Shallow • Structural Depth Phase 1 Beams • CM Breadth • Structural Depth Phase 2 • Sustainability Breadth • Questions/Comments
Existing Structure Shear Walls Judicial Center Annex N • Foundations • Building Overview • Cast – In – Place Drilled Piers • Existing Structural System • Framing • Proposal • Post-tensioned Slab with Wide-Shallow • Structural Depth Phase 1 Beams • CM Breadth • Lateral • Structural Depth Phase 2 • Five Cast-In-Place Shear Walls • Sustainability Breadth • Questions/Comments
Existing Structure Lantern Framing Judicial Center Annex • Foundations • Building Overview • Cast – In – Place Drilled Piers • Existing Structural System • Framing • Proposal • Post-tensioned Slab with Wide-Shallow • Structural Depth Phase 1 Beams • CM Breadth • Lateral • Structural Depth Phase 2 • Five Cast-In-Place Shear Walls • Sustainability Breadth • Lanterns • Questions/Comments • Steel
Proposal Problem Statement Judicial Center Annex • Building Overview • Phase 1 • Phase 1 • Existing Structural System • Steel redesign has good chance of • No height restriction and large floor • Proposal being competitive to floor heights • Structural Depth Phase 1 • Phase 2 • Phase 2 • CM Breadth • Move building to San Francisco and • Interest in seismic design • Structural Depth Phase 2 design steel for new seismic region • Sustainability Breadth • Questions/Comments
Proposal Goals Judicial Center Annex • Building Overview • Phase 2 (Purely Lateral System) • Phase 1 • Phase 1 • Phase 2 • Existing Structural System • Design Phase 1 layout for increased • Compare cost and schedule of • Redesign gravity system as LW • Compare lateral system cost of three • Proposal seismic loads using SCBF original design in MD to steel design concrete on metal deck on composite layouts • Structural Depth Phase 1 • Design a more redundant lateral beams in MD • CM Breadth • Use braced frames for lateral system system using SCBF • Structural Depth Phase 2 • Change two frames in redundant • Reevaluate foundations with new • Sustainability Breadth design to EBF loads • Questions/Comments
MAE Requirements ETABS Model Judicial Center Annex • Building Overview • AE 597A – Computer Modeling • Existing Structural System • AE 534 – Steel Connections • Proposal • AE 538 – Earthquake Engineering • Structural Depth Phase 1 • CM Breadth • Structural Depth Phase 2 • Sustainability Breadth • Questions/Comments
Structural Depth Wall Sections Judicial Center Annex • Building Overview • Use existing grid lines to reduce • Existing Structural System structural impact • Proposal • Place Ordinary Concentric Braced • Structural Depth Phase 1 Frames in location of shear walls • CM Breadth • R = 3 • Structural Depth Phase 2 • Minimize adjustment to height • Sustainability Breadth • Questions/Comments
Gravity System Typical Framing Judicial Center Annex N • Building Overview • Typical: 2VLI18 w/ 3” LW Topping • Existing Structural System W10 • Penthouse: 3VLI16 • Proposal w/ 3 ¼ ” LW Topping W16 • Structural Depth Phase 1 • CM Breadth Typical Bay Design Hand RAM ETABS W12 Beams W16x31 (26) W16x26 (24) W16x26(22) • Structural Depth Phase 2 Girder D W21x68(40) W24x55(68) W24x55(48) Girder E - W24x62(60) W24x62(44) • Sustainability Breadth W16 • Questions/Comments
Lateral System Brace Frame Layout Judicial Center Annex N • Building Overview Base Shear BF 4 BF 5 • Existing Structural System • Wind • Proposal • NS – 324 kips • Structural Depth Phase 1 • EW – 377 kips • CM Breadth • Earthquake BF 3 • Structural Depth Phase 2 • Both Directions – 441 kips BF 2 • Sustainability Breadth BF 1 • Questions/Comments Braced Frame 2 Braced Frame 1 Braced Frame 4 & 5 Braced Frame 3
Foundation Quantities Judicial Center Annex N • Building Overview • Existing Structural System Foundations • Proposal Original Redesign • Structural Depth Phase 1 CY Concrete 1506 798 • CM Breadth Tons of Stl 61.7 29.3 • Structural Depth Phase 2 • Sustainability Breadth • Questions/Comments
Construction Management Summary Judicial Center Annex Cost Comparison As Designed ReDesign • Building Overview Value Adj for Super Structure Value O&P Cast-In-Place Concrete $ 6,281,783.00 $ 1,839,890.40 • Existing Structural System Structural Steel $ 1,784,892.00 $ 5,726,574.58 Cost/Schedule Summary Substructure • Proposal Drilled Piers $ 953,320.00 $ 557,951.45 Original Redesign • Structural Depth Phase 1 Exterior Enclosure Schedule 9 months 8 months Arch. Precast $ 598,000.00 $ 609,960.00 Metal Wall Panels $ 2,125,533.00 $ 2,168,043.66 • CM Breadth Cost $ 24,281,941 $ 23,691,601 Curtain Wall $ 6,456,000.00 $ 6,585,120.00 Interior Glass (CW) $ 683,223.00 $ 696,887.46 • Structural Depth Phase 2 Louvers & Vents $ 38,167.00 $ 38,930.34 Interior • Sustainability Breadth Masonry $ 1,801,768.00 $ 1,837,803.36 Gypsum Board $ 3,559,255.00 $ 3,630,440.10 • Questions/Comments Comparison $ 24,281,941.00 $ 23,691,601.35 Savings $ 590,339.65
Structural Depth Phase 2 CA Layout 1 Judicial Center Annex Base Shear • Wind • Building Overview • NS – 304 kips BF 4 BF 5 • Existing Structural System • EW – 346 kips • Proposal • Earthquake • Structural Depth Phase 1 • Both Directions – 1384 kips • CM Breadth *MRSA BF 3 • Structural Depth Phase 2 BF 2 • Sustainability Breadth BF 1 • SDC = D • Questions/Comments • SCBF, R=6
Chevron Connection Seismic Provisions Judicial Center Annex AISC 341 - 05 (2) 3/8” x 3 ½” PL W33x354 13.2a Slenderness – Bracing members shall have : 𝐿𝑚/𝑠 ≤ 4 𝐹/𝐺 • 𝑧 • Building Overview • 13.3 Required Strength of Bracing Connections • Existing Structural System 𝑈𝑓𝑜𝑡𝑗𝑚𝑓 𝑇𝑢𝑠 = 𝑆 𝑧 𝐺 𝑧 𝐵 𝐷𝑝𝑛𝑞𝑠 𝑇𝑢𝑠 = 1.1𝑆 𝑧 𝑄 𝑜 𝐺𝑚𝑓𝑦𝑣𝑠𝑏𝑚 𝑇𝑢𝑠 = 1.1𝑆 𝑧 𝑁 𝑞 3/8 • Proposal TYP. 3/8 • 13.4a Inverted V-Type Bracing – For loading acting on the member • Structural Depth Phase 1 1/4 • CM Breadth 1” PL TYP. 𝐶𝑠𝑏𝑑𝑓 𝑈𝑓𝑜𝑡𝑗𝑚𝑓 𝑇𝑢𝑠 = 𝑆 𝑧 𝐺 𝑧 𝐵 , 𝐷𝑝𝑛𝑞𝑠 𝑇𝑢𝑠 = 0.3𝑄 1/4 𝑜 HSS8x8x1/2 • Structural Depth Phase 2 5/8” x 5 1/4” PL • Sustainability Breadth • 13.4a(2) – Top and Bottom Flanges must be braced TYP. 3/8 • Questions/Comments + Gap 𝐷 𝑒 𝑄 𝑐𝑠 = 0.02𝑁 𝑠𝑦 ℎ 𝑝
CA Layout 2 Judicial Center Annex • Building Overview BF 4 BF 5 • Existing Structural System • Proposal BF 8 BF 7 • Structural Depth Phase 1 • CM Breadth BF 3 • Structural Depth Phase 2 BF 2 • Sustainability Breadth BF 1 BF 6 • Questions/Comments
Additional Frames Judicial Center Annex • Building Overview BF 4 BF 5 • Existing Structural System • Proposal BF 8 BF 7 • Structural Depth Phase 1 • CM Breadth BF 3 • Structural Depth Phase 2 BF 2 • Sustainability Breadth BF 1 BF 6 • Questions/Comments Braced Frame 7 Braced Frame 8 Braced Frame 1 & 6
CA Layout 3 EBF Elevations Judicial Center Annex • Building Overview BF 4 BF 5 • Existing Structural System • Proposal BF 8 BF 7 • Structural Depth Phase 1 • CM Breadth BF 3 • Structural Depth Phase 2 BF 2 • Sustainability Breadth BF 1 BF 6 • Questions/Comments Braced Frame 4&5
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