Journal ArticleDOI
Testbed for Structural Health Monitoring of Long-Span Suspension Bridges
TLDR
In this paper, the design and setup of a physical model for a long-span suspension bridge, which will consider various damage scenarios, was described, and geometric measurements and modal tests were subsequently carried out to identify its geometric configuration and dynamic characteristics, respectively.Abstract:
Comprehensive structural health monitoring systems have been developed and installed in several long-span suspension bridges around the world, aiming to monitor structural health conditions of the bridges in real time. Nevertheless, many key issues remain unsolved, such as how to take full advantage of the health monitoring system for effective and reliable damage detection of these complex structures. An innovative testbed was therefore established in a laboratory to allow researchers to recreate rational damage scenarios, apply different sensors and sensing networks, and test various damage detection algorithms. The design principles of the laboratory-based testbed are introduced. The paper will then outline the design and setup of a physical model for a long-span suspension bridge, which will consider various damage scenarios. Geometric measurements and modal tests were subsequently carried out to identify its geometric configuration and dynamic characteristics, respectively. The finite-element modeling of the physical bridge model was finally established using a commercial software package, which was followed by a finite-element model updating the use of the measured modal properties. This testbed, comprising of the delicate physical model and the updated finite-element model of a long-span suspension bridge, could solve a benchmark problem for the structural health monitoring of long-span suspension bridges.read more
Citations
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Journal ArticleDOI
Categories of SHM Deployments: Technologies and Capabilities
TL;DR: In this article, the authors present an extensive literature survey focusing on bridge structural health monitoring (SHM) deployments and propose a categorization system to better assess the potential outcomes of bridge SHM deployments, which can be categorized as one (or a combination) of the following: (1) anomaly detection, (2) sensor deployment studies, (3) model validation, (4) threshold check, and (5) damage detection.
Journal ArticleDOI
Structural health monitoring system for Sutong Cable-stayed Bridge
TL;DR: In this paper, the structural health monitoring system (SHMS) is implemented on a world-famous kilometer-level cable-stayed bridge, named as Sutong Cable-Stayed Bridge (SCB).
Journal ArticleDOI
Multi-type sensor placement and response reconstruction for structural health monitoring of long-span suspension bridges
TL;DR: The experimental results show that the reconstructed responses from the limited number of multi-type sensors agree well with the actual bridge responses and are validated to be feasible and effective for the monitoring of structural behavior of long-span suspension bridges.
Journal ArticleDOI
Challenges in Bridge Health Monitoring: A Review
TL;DR: In this paper, the authors present a review of the challenges associated with bridge health monitoring related to the detection of specific bridge characteristics that may be indicators of anomalous behavior, such as loss of stiffness, time-dependent and temperature-dependent deformations, fatigue, corrosion, and scour.
Journal ArticleDOI
Experimental investigation on multi-objective multi-type sensor optimal placement for structural damage detection:
TL;DR: An optimal sensor placement with multiple types of sensors could provide informative data of a structure to facilitate its structural damage detection and could provide accurate damage localization and satisfactory damage quantitation and yielded better damage identification than the non-optimal sensor placement.
References
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Journal ArticleDOI
A summary review of vibration-based damage identification methods
TL;DR: In this paper, the authors provide an overview of methods to detect, locate, and characterize damage in structural and mechanical systems by examining changes in measured vibration response, including frequency, mode shape, and modal damping.
Book
Nonlinear Programming: Sequential Unconstrained Minimization Techniques
TL;DR: This report gives the most comprehensive and detailed treatment to date of some of the most powerful mathematical programming techniques currently known--sequential unconstrained methods for constrained minimization problems in Euclidean n-space--giving many new results not published elsewhere.
Journal ArticleDOI
Model Updating In Structural Dynamics: A Survey
TL;DR: It is the authors' hope that this work will prove to be of value, especially to those who are getting acquainted with the research base and aim to participate in the application of model updating in industry, where a pressing need exists.
Journal ArticleDOI
Phase I IASC-ASCE Structural Health Monitoring Benchmark Problem Using Simulated Data
TL;DR: The scale-model structure adopted for use in this benchmark problem, and two analytical models based on the structure—one a 12 degree of freedom (DOF) shear-building model, the other a 120-DOF model, both finite element based—are given.
Journal ArticleDOI
Structural Finite Element Model Updating Using Ambient Vibration Test Results
Bijaya Jaishi,Wei-Xin Ren +1 more
TL;DR: In this article, the authors presented a practical and user-friendly finite element (FE) model updating technique for real structures using ambient vibration test results, which is able to produce sufficient improvement on modal parameters of the concerned modes which is in close agreement with the experimental results still preserving the physical meaning of updated parameters.
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