Fast Seismic Life Cycle Cost Optimization of Steel Moment Frames to Improve Seismic Performance

A conceptual design study has been conducted for an all-new, land-based patrol aircraft for the U.S. Navy. The selected propulsion system was a conceptual high-speed turboprop. An antisubmarine warfare mission was chosen for the design flight profile. Probable peacetime utilization was postulated so that the engine duty cycle could be estimated. Aircraft designs were optimized for minimum takeoff gross weight (TOGW) and for minimum life cycle cost (LCC). It was shown that the aircraft performance requirements and design constraints bound the optimization process so tightly that the same point design is obtained for both TOGW and LCC criteria. The contribution of the engine costs to the overall life cycle costs was examined. The sensitivity of the aircraft optimization to the engine characteristics — specific fuel consumption (SFC), length, diameter, and cost — was analyzed. It was determined that SFC is the most significant engine characteristic.

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Life‐cycle cost optimization of semiactive magnetorheological dampers for the seismic control of steel frames

The Structural Design of Tall and Special Buildings ◽

10.1002/tal.1807 ◽

2020 ◽

Vol 29 (18) ◽

Author(s):

Soheil Salajegheh ◽

Payam Asadi

Keyword(s):

Life Cycle ◽

Life Cycle Cost ◽

Cost Optimization ◽

Steel Frames ◽

Magnetorheological Dampers ◽

Seismic Control

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Investigation of Seismic Performance of (RBS) and Drilled Flange Connection (DFC) Containing rhombus Shaped Hole in Steel Moment Frames

Australian Journal of Civil Engineering ◽

10.1080/14488353.2020.1771664 ◽

2020 ◽

Vol 18 (2) ◽

pp. 246-262

Author(s):

Mehdi Vajdian ◽

S. Mehdi Zahraei ◽

S. Mohammad Mirhosseini ◽

Ehsanollah Zeighami

Keyword(s):

Seismic Performance ◽

Moment Frames ◽

Steel Moment Frames ◽

Flange Connection ◽

Shaped Hole

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Cost optimization of concrete bridge infrastructure

Canadian Journal of Civil Engineering ◽

10.1139/l03-045 ◽

2003 ◽

Vol 30 (5) ◽

pp. 841-849 ◽

Cited By ~ 25

Author(s):

Mostafa A Hassanain ◽

Robert E Loov

Keyword(s):

Life Cycle ◽

Life Cycle Cost ◽

High Performance ◽

High Performance Concrete ◽

Cost Optimization ◽

Concrete Bridges ◽

Concrete Bridge ◽

Analysis And Design ◽

Prestressed Girders ◽

Advanced Analysis

Recent surveys have indicated that between 30% and 40% of all bridges in North America are in various states of deterioration. Funding is limited owing to the existence of other deficient components of the transportation infrastructure. It is clear, therefore, that the return on the available funding needs to be maximized. This paper presents a review of publications on cost optimization of concrete bridge components and systems and then continues with a review of the state-of-the-art in life-cycle cost (LCC) analysis and design of concrete bridges. The main objective of the paper is to encourage bridge engineers to move towards the increased use of advanced analysis and design optimization methods.Key words: bridge, concrete, cost, high-performance concrete, infrastructure, life-cycle cost, optimization, prestressed girders, reliability.

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