Its All Fun and Games Until the Parking

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“It’s All Fun and Games Until the Parking Garage Collapses” CASE STUDY: 2003 Tropicana

“It’s All Fun and Games Until the Parking Garage Collapses” CASE STUDY: 2003 Tropicana Casino Parking Garage Collapse

Reinforced Concrete • Matrix- concrete • Can withstand high compression • Relatively low tensile

Reinforced Concrete • Matrix- concrete • Can withstand high compression • Relatively low tensile strength – Compressive strength : 20 - 40 MPa (3000 - 6000 psi) 1 – Tensile strength : 2 - 5 MPa (300 - 700 psi) 1 • Reinforcement- rebar • Steel bar • Relatively low compressive strength • High tensile strength – 70, 000 -100, 000 psi 2 1. http: //www. engineeringtoolbox. com/concrete-properties-d_1223. html 2. http: //www. webcivil. com/usrcrebar. aspx

Composite Properties • Concrete provides compression strength • Rebar provides tensile strength • Why

Composite Properties • Concrete provides compression strength • Rebar provides tensile strength • Why is it important to have both? Image from www. doitpoms. ac. uk

Ways Reinforced Concrete Can Fail Image from http: //www. compactdynamics. com/taunt_foundations 1. html

Ways Reinforced Concrete Can Fail Image from http: //www. compactdynamics. com/taunt_foundations 1. html

2003 Tropicana Parking Structure Collapse • Keating Construction Company of Philadelphia heading project –

2003 Tropicana Parking Structure Collapse • Keating Construction Company of Philadelphia heading project – Subcontracted to Fabi Construction Company of Egg Harbor, NJ • Emphasis on speed of construction rather than safety • Part of the structure collapsed while worker was pouring concrete • 4 workers killed, over 20 injured • Company fined $119, 500 by OSHA • $101 million settlement paid to the families of those injured or killed https: //failures. wikispaces. com/Tropacana+Casino+Parking+Garage#IV. %20 CAUSES%20 OF%20 THE%20 FAILURE

Challenge- Why Did the Structure Collapse? • Split into groups of 4 -5 people

Challenge- Why Did the Structure Collapse? • Split into groups of 4 -5 people • Elect a spokesperson • Spend 15 -20 minutes hypothesizing why the structure fell based on images provided, as well as what you know • Report your conclusions to the class

Reasons for Failure • Rebar mesh used instead of rebar rods – Not a

Reasons for Failure • Rebar mesh used instead of rebar rods – Not a problem, except that the mesh was not laid far enough into the columns – Rebar mesh “ripped out” of columns • Insufficient stabilization of drying concrete – Wet concrete is significantly heavier than dry concrete – Metal rods used to hold up drying concrete bent https: //failures. wikispaces. com/Tropacana+Casino+Parking+Garage#IV. %20 CAUSES%20 OF%20 THE%20 FAILURE

Its All Fun and Games Until the ParkingIts All Fun and Games Until the Parking
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LECTURE 06 PARKING SURVEYS PARKING SURVEY Parking isLECTURE 06 PARKING SURVEYS PARKING SURVEY Parking is
PARKING TICKETS Parking onstreet double yellow lines parkingPARKING TICKETS Parking onstreet double yellow lines parking
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