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Index. UMMC Critical Care Tower Baltimore, MD. Blast Analysis and Redesign. Nicholas Leonard Structural Option The Pennsylvania State University BAE/MAE of Architectural Engineering Advisor: Kevin Parfitt. Scenario. Introduction. LS- Dyna. Predictions. Breadth: BIM. Breadth: SHG. - PowerPoint PPT Presentation
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Introduction Project Information Depth: Blast Analysis Scenario Existing Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG Conclusion UMMC Critical Care Tower Baltimore, MD Nicholas Leonard Structural Option The Pennsylvania State University BAE/MAE of Architectural Engineering Advisor: Kevin Parfitt Predictions Index
Transcript
Page 1: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG Conclusion

UMMC Critical Care TowerBaltimore, MD

Nicholas LeonardStructural OptionThe Pennsylvania State UniversityBAE/MAE of Architectural EngineeringAdvisor: Kevin Parfitt

Predictions

Index

Page 2: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Leonard TaylorKevin ParfittEddie O’hareAnand Kumar SinghAbdul AzizRyan Solnosky

And a many thanks to

BALLINGER

for supplying a full set of drawings,and permission to use renderings.

Index

Page 3: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Location: 22 South Greene Street, Baltimore, MD 21201

Function: Renovation including an additional five operating rooms and 60 patient rooms.

Total Floor Area: 140,000 sq. ft.

Height: 7 Stories + Penthouse (~116 ft.)

Anticipated Completion: 2013

Cost: $89,225,671 (structure only)

Contract Type: Guaranteed Max Price

Delivery Method: Design-Bid-Build

Architecture:

-Modular Units-Beige and Red Terra Cotta

-Cantilever Section-Additional Helipad

Index

Page 4: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Why should we consider blast?

Terrorism

How do we design for blast?

TM 5-1300Structures to Resist the Effects

of Accidental Explosions

Alfred P. Murrah Federal Building

Index

Page 5: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Foundations:

Gravity and Lateral Systems: The Cantilever System:Index

Page 6: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

• Largest to likely occur• Similar charge weight as

Oklahoma City Bombing• Challenging design

12 ft

22.5 ft

2 ftGround Surface

Index

Page 7: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

The Blast Curve & Dynamic Behavior:

Impulse load followed by a period of free vibration.

Structure dissipates energy through plastic yielding of reinforcement, and resists impulse from concrete’s mass.

Positive and negative phase.

Large Peak Overpressure.

Short Duration.

Explosion Types and Reflectance:Free-Air Bursts vs. Ground Surface Bursts

Material Properties:

Material Design Strength

Strength Increase Factor

Dynamic Increase Factor

Actual Strength

Concrete 6000 psi 1.26 1.19 8996 psi

Steel Reinforcem

ent

60 ksi 1.1 1.1 72.6 ksi

Index

Page 8: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Type of Program:Extreme event, non-linear dynamic, finite element analysis (LSTG).

LS-PrePost is user friendly interface

Compatibility:Had to reduce file size to compute.

Final file size ~ 550 MB, and required 60 GB of memory to perform analysis

High Performance Computing:Set up Hammer Account with Penn State

Completed one iteration in a 24 hr time span

Keyword Format

Cards

My Model:3” Meshing Cubes

Concrete Mesh (solid element)

Reinforcement (beam element)

Index

Page 9: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Index

Page 10: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Time Step Snapshots

Index

Page 11: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 12: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 13: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 14: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 15: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 16: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 17: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 18: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 19: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 20: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 21: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 22: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 23: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Page 24: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Element Ductility Joint Rotation Response Limit

Column 103 4.02 deg 4.0 deg (N.G.)

1ft Strip of Slab

Not Valid Not Valid 6.0 deg (N.G.)

Hand Calculations:

Recommended Redesign:

Increasing Standoff Distance

OR

Hardening of the Structure

Element Ductility Joint Rotation Response Limit

Column 13.8 2.72 deg 4.0 deg (Good)

1ft Strip of Slab

9.28 5.31 deg 6.0 deg (Good)

½” steel jacket surrounding all five column along column line B.

½” plate steel, increase thickness to 8”, and add additional #7 reinforcement for above slab.

Material Quantity Unit Price SubtotalConcrete 312 CY $124/CY $38688

Rebar 118 Tons $1050/Ton $123900Steel Plate 29265 sq ft $25.50/sq ft $746257

    Total $908845

Index

Page 25: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

Major BIM Goals:

• Use FEM to more accurately design for blast.• Shift from using 2D paper based drawings onsite to

a 3D model on a tablet.• Better communication between the design team

and contractor.• Minimize the amount of change orders.• No items on punch list by project turnover.• More precise modeling of existing conditions.• Have the system perform during operations as

designed.• Increase efficiency of equipment maintenance.

Purpose for a BIM Execution Plan ultimately is to save money through efficiency during design and construction by better means of communication.

1. Defining goals and BIM Uses2. Organize processes3. Develop Information

Exchanges/Deliverables4. Set up infrastructure

STARTPROCESS

DEFINE WHAT CONSTITUTES AS A

DISASTER AND MAGNITUDE

DETERMINE WHAT AVAILABLE

RESOURCES ARE ACCESSIBLE AND

NEARBY

DEVELOP EVACUATION

PLANS FOR EACH LEVEL OF DISASTER

DEVELOP AN IMMEDIATE

ASSESSMENT AND REPAIR PLAN

MODEL THE DIFFERENT

SCENARIOS USING APPROPRIATE

SOFTWARE

DOES IT MEET REQUIREMENT

S?

STARTPROCESS

YES

NO

Disaster Plann

in Level 2: Disaster Planning

Index

Page 26: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

• ASTM E1300 and F2248

Disaster Plann

in

Why consider glass in blast design?

Method: SHG Calculation & Comparison:Type U-Factor SHGC Shade IAC

1/4” annealed 0.58 0.69 0.85/8” fully

temp. w/ PVB Interlayer

2.3 0.8 0.92

Existing Redesign

Index

Page 27: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG Conclusion

Introduction

Predictions

Thank you for listening!

I will now take any questions or comments.

Project InformationDepth: Blast AnalysisExisting StructureScenarioBlast PhenomenonLs-DynaPredictionsAnalysis and ResultsBreadth: BIMBreadth: Glass Redesign

Index

Page 28: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

AppendixIndex

Page 29: Introduction

Introduction Project Information Depth: Blast Analysis ScenarioExisting Structure Blast Phenomenon LS-Dyna Analysis & Results Breadth: BIM Breadth: SHG ConclusionPredictions

AppendixIndex


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