Rethinking the Application of Engineering: Structural Analysis of Economic Impact Risk Propagation in Infra_Structures. Dr. Albert Owusu PhD; M.Sc. (Proj Mgt); M. E (Civil Eng.); B.Sc.(Civil Eng.); PMI. MNZSEE. Telephone:
Objectives of Presentation Exhibit a Model Impact Propagation Illustrate Structural concept application Show convergence between Structural & Economic concepts To encourage Engineers to take interest and explore Engineering applications in other disciplines. 2
What is Infra_Structure Network of a nation’s assets which runs the economy. Examples: Transport Infrastructure(road, air, sea, rail, etc) Energy & Power Grid Communication (Telephone, internet, etc ) The Environment (Ecosystem & Biodiversity) Banking & Finance, Generally: public assets and services natural assets and natural resource-based industries 3
Infra-structures Connectivity 4 Interdependent, Dependent, Isolated
Model Impact Transfer 5 (a 1 ) x 1 (b 2 ) x 2 Power & Grid Telecommunication (a 1 ) x (b 2 ) x
6 Wassily Leontief's Economic Model v11v11 r2r2 v22v22 X2X2 X3X3 X1X1 r1r1 r3r3 v12v12 v13v13 v21v21 v23v23 v33v33 v31v31 v32v32 THREE CONNECTED INFRASTRUCTURES
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8 EXTRACT DATA FROM INPUT OUTPUT BY INFRASTRUCTURES USE Oil and gasPetroleum and coal products Iron and steelElectricity supply Water supply; sewerage and drainage services Construction trade services Road transportCommunication services BankingHealth services SUPPLY 1201Oil and gas Petroleum and coal products Iron and steel Electricity supply Water supply; sewerage and drainage services Construction trade services Road transport Communication services Banking Health services
9 Model Network System: Distributing factors (Vulnerability Coefficients). Model Infrastructure Network System: Supports (infrastructures) and Beams (links) A model structure with impact loads (Total = 350kN) STRUCTURAL ANALYSIS ANALOGY MOMENT DISTRIBUTION
10 MOMENT DISTRIBUTION =IMPACT PROPAGATION
11 Stiffness By definition it can be written as Eq. (5-33): Stiffness factors (Vulnerability factors) :
12 spring with nodes 1 and 2 has stiffness k axial displacements at nodes = u 1, u 2 axial forces at nodes = F 1, F F 2, u 2 F 1, u 1 k
Example
14 QUESTION TIME