Life-cycle cost-effective optimum design of steel bridges considering environmental stressors

A fuzzy integrated methodology for evaluating conceptual bridge design

“…The proposed method utilized the multi-objectives concept and fuzzy decision making techniques by considering cost and aesthetic criteria. Lee, Cho, and Cha (2006) presented lifecycle cost methodology for the optimum design of steel bridges considering the time effect of bridge reliability under environmental impact. Ugwu, Kumaraswamy, Wong, and Ng (2006) discussed project-level sustainability assessment using the mathematical models and computational in the infrastructure project for the design stage of real case.…”

Risk-based seismic life-cycle cost–benefit (LCC-B) analysis for bridge retrofit assessment

“…A rational approach to life-cycle cost analysis considers all costs incurred over the structure's life-time ranging from initial construction, to maintenance and repair, to deconstruction, among others, expressed in present day dollars [7]. Although most studies evaluating bridge life-cycle costs have emphasized assessment of maintenance or repair strategies [9][10][11], past work by other researchers has noted the important contribution of extreme events to a structure's life-cycle costs [8]. For example, Wen [12] emphasized use of the principle of minimum life-cycle cost criteria to achieve the desired reliability for performance-based design of steel buildings under multiple threats scenarios.…”

Life-Cycle Management Strategy on Steel Girders in Bridges

“…Except for high-performance steel such as anticorrosion weathering steel, steel girder bridges are usually subject to corrosion to certain degrees. If undetected over a period of time, corrosion will weaken webs and flanges of steel girders by reducing the material thickness and possibly lead to dangerous structural failures [7].…”

“…Lee et al [7], based on previous studies, introduced a modified corrosion propagation model with periodic repainting as shown in (3). Lee's corrosion model is adopted for service life prediction of steel girders in this paper.…”