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Transcript

Design Failures in Civil Engineering

Case review

Lessons learnt

Introduction

St Francis Dam

Citicorp Centre- Design flaw

Citicorp Centre-Original design

Typical arrangement

Why does failure

happen in Civil Engineering?

  • Employed three different weather services to keep an eye on potential windstorms

Mass damper

Citicorp Centre arrangement

-Analyzed by Swiss federal Institute of technology in Zurich

THANKS FOR YOUR ATTENTION,

QUESTIONS?

Solution

  • Develop an evacuation plan spanning 10 block radius

Comments and lessons learnt

  • Analysis of wind loads: dont rely only in design manuals
  • Design changes during construction
  • Advancement of professional knoledge

WAS LEMESSURIER A GOOD OR A BAD DESIGNER?

  • Decided to carry out emergency repairs avoiding to inform the public, which included:

-Night shifts during three months

-Welded 2" steel plates over each of the 200 Skyscrapper´s bolted joints.

400 ton concrete tuned mass damper

Diagonal girders to transfer the load to the four columns

with welded joints.

Four nine-story stilts and a central column.

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