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RISLong-Term Damping Characteristics of Twin Cable-Stayed Bridge under Environmental and Operational Variations
Publisher: ASCE
Abstract: The recent development of automated operational modal analysis (OMA) has enabled the modal tracking of environmental and operational conditions. Variations in these conditions have prevented investigations into the long-term ...
Damping Identification and Serviceability Assessment of a Cable-Stayed Bridge Based on Operational Monitoring Data
Publisher: American Society of Civil Engineers
Abstract: This study reports on the assessment of the vibrational serviceability performance of a parallel cable-stayed bridge, which was subjected to a vortex-induced vibration (VIV) in 2011, by identifying modal damping ratios ...
Evaluating the Threshold for Corrosion-to-Fatigue Crack Transition Using a Corroded Steel Plate from an In-Service Bridge
Publisher: ASCE
Abstract: The linear elastic fracture mechanics (LEFM)–based approach has been widely applied to investigate the threshold for corrosion-to-fatigue crack transition in the corrosion fatigue process. However, investigations to determine ...
Risk Assessment of Wind-Induced Vehicle Accidents on Long-Span Bridges Using Onsite Wind and Traffic Data
Publisher: ASCE
Abstract: A systematic approach was proposed to assess vehicle accident risk over sea-crossing bridges under strong winds. The annual frequency of an accident was evaluated as a risk index using the information on daily traffic ...
Real-Time Aeroelastic Hybrid Simulation Method for a Flexible Bridge Deck Section Model
Publisher: American Society of Civil Engineers
Abstract: To address the challenges in predicting the aeroelastic phenomenon and the resulting wind-induced forces on slender bridges, a real-time aeroelastic hybrid simulation (RTAHS) system was developed. The RTAHS system directly ...
Performance of Unpretensioned Wind Stabilizing Cables in the Construction of a Cable-Stayed Bridge
Publisher: American Society of Civil Engineers
Abstract: A stabilizing cable (SC), used for mitigating buffeting vibration in a cantilevered structure of a cable-stayed bridge during construction, is normally installed with pretension. When a situation arises where only SCs are ...
Geometrically Nonlinear Buffeting Response of a Cable-Stayed Bridge
Publisher: American Society of Civil Engineers
Abstract: A geometrically nonlinear buffeting analysis of a cable-stayed bridge in the time domain is described. The bridge structure is modeled with three-dimensional thin-walled beam elements and three-dimensional elastic catenary ...
Modeling Corrosion Progress of Steel Wires in External Tendons
Publisher: American Society of Civil Engineers
Abstract: When prestressing tendons are corroded, a bridge owner must decide whether to replace or repair them. If this decision must be based on a destructive inspection method, section losses in the steel strands must be estimated ...
Evaluation of Impulse Response Functions for Convolution Integrals of Aerodynamic Forces by Optimization with a Penalty Function
Publisher: American Society of Civil Engineers
Abstract: This paper presents a new algorithm for evaluating impulse response functions for the convolution integrals of the aerodynamic forces of bridge decks. The impulse response functions formed by measured flutter derivatives ...
New Unified Approach for Aeroelastic Analyses Using Approximate Transfer Functions of Aerodynamic Forces
Publisher: American Society of Civil Engineers
Abstract: A unified approach for the aeroelastic analysis of bridge decks is presented. The structural aerodynamic transfer functions are approximated using a second-order polynomial with the coefficients determined through minimization ...