Chloride-induced corrosion of highway bridges constitutes a critical form environmental deterioration and may result in significant escalation seismic life-cycle costs due to increased fragility during earthquake events. Most existing literature tends adopt simplistic uniform area loss assumptions lieu potentially complex, yet realistic more detrimental, pitting models for vulnerability analysis. Since the degree depends on severity duration exposure, there exists need investigate influence...

The lateral load–carrying capacity of highway bridges is adversely affected by corrosion deterioration reinforced concrete (RC) bridge piers during earthquakes. Recent studies reveal that increased global warming due to climate change causes changes in temperature and humidity further exacerbate the RC piers. This change–induced may impair performance when located regions moderate high seismic zones. Consequently, this study provides a probabilistic framework for considering joint impact...

Seismic design principles of highway bridges across the globe have undergone significant modifications over last decades, from little consideration seismic effects to adoption modern ductile detailing principles. The existence with such diverse methodologies renders vulnerability assessment for future earthquakes particularly challenging. Consequently, robust analytical models are required capture varied failure mechanisms differently designed aid systematic impact code evolution on...

In seismic-prone regions, the evaluation of structural performance bridges under mainshock-aftershock ground motion sequences is imperative for ensuring their safety and facilitating effective response measures. However, limited availability real-recorded region-specific condition results in adoption artificially generated seismic fragility assessment bridges. This study presents a new approach artificial generation by quantifying relationship between parameters sequences, while also...

Abstract Corrosion of reinforced concrete (RC) structures constitutes a critical form environmental deterioration and may significantly increase the vulnerability old non‐seismically designed buildings during earthquake events. This study proposes probabilistic framework to evaluate influence corrosion on lifetime seismic fragility low‐ductility RC frame buildings. In contrast limited past literature this topic, proposed offers novel contributions. is one first consider potential alteration...

Mechanical micromachining has become a leading approach to fabricating complex three-dimensional microscale features and miniature devices on broad range of materials. To satisfy the accuracy productivity demands various applications, tool-tip dynamics, i.e., dynamic behavior tool-ultra high-speed spindle assembly as reflected at cutting edges microtool, should be well-understood. However, existing techniques for predicting dynamics pose strict limitations in frequency bandwidth do not...

Despite the potential of long duration earthquakes in subduction zones, little attention has been paid on seismic vulnerability assessment highway bridges that are simultaneously undergoing prolonged corrosion deterioration. Consequently, this study presents a framework for considering joint impact ground motion and chloride-induced deterioration lifetime aging bridge structures. The proposed is then applied to representative case-study multi-span simply supported located earthquake zone...

This paper presents a novel vector-based seismic vulnerability assessment methodology for deteriorating highway bridges by uniquely accounting realistic deterioration of key structural components. The proposed framework offers notable enhancement over the state-of-the-art procedures that assume simplified and often unrealistic models bridge components promote inflexible unidimensional fragility curves aging structures. Based on available data from past field investigation reports laboratory...

In this work, we present a model to predict the speed-dependent radial throw at tool-tip during micromachining with ultra-high-speed (UHS) spindles. This nature of arises from interaction between quasi-static (tool attachment errors, tool geometric and spindle error motions) dynamic response tool-collet-spindle system. The causes cutting edge trajectory deviate ideal trajectory, critically affecting attainable dimensional accuracy surface quality, as well forces. Hence, accurate...

This study offers a probabilistic framework for the seismic life-cycle cost (SLCC) assessment of aging highway bridge structures in complex seismogenic zones, followed by case-study application on popular class Seattle (United States). The proposed efficiently handles implications differing hazard scenarios (crustal and subduction earthquakes) along with time-dependent deterioration mechanisms fragility lifetime economic losses. These losses, stemming from damage-induced repair critical...

Multi-span simply supported (MSSS) highway bridges are one of the most common bridge types across world and have several vulnerable components, including bearings, piers, abutments. Although past studies evaluated seismic response fragility multi-span bridges, there is negligible research that explores influence bearing types, non-ductile failure modes piers on performance older non-seismically designed bridges. Additionally, a better understanding risk to transportation systems necessitates...

In the current work, we describe and evaluate application of Bayesian inference to estimate and/or refine mechanistic model force coefficients, as well quantify uncertainties associated with coefficients in models for polymer micromilling. Proper modeling forces is important optimize process accuracy productivity, including characterizing stability micromachining process. Although precision depends on uncertainty these are deterministic do not take into account parameters. provides a formal...