Use of FBG optical sensors for structural health monitoring: Practical application

This paper describes the development of FBG Optical sensors for their practical application on structural health monitoring. The sensors were installed on the Tsing Ma Bridge for a trial run. The results using FBG sensors were in excellent agreement with those acquired by the bridge WASHMS

Deformation monitoring of a super-tall structure using real-time strain data

2013-2014 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

Vibration suppression in high-speed trains with negative stiffness dampers

Copyright © 2018 Techno-Press, Ltd. This work proposes and investigates re-centering negative stiffness dampers (NSDs) for vibration suppression in high-speed trains. The merit of the negative stiffness feature is demonstrated by active controllers on a high-speed train. This merit inspires the replacement of active controllers with re-centering NSDs, which are more reliable and robust than active controllers. The proposed damper design consists of a passive magnetic negative stiffness spring and a semi-active positioning shaft for re-centering function. The former produces negative stiffness control forces, and the latter prevents the amplification of quasi-static spring deflection. Numerical investigations verify that the proposed re-centering NSD can improve ride comfort significantly without amplifying spring deflection

A magnetorheological damper with embedded piezoelectric force sensor : experiment and modeling

2010-2011 > Academic research: refereed > Chapter in an edited book (author)Version of RecordPublishe

Shape memory effect and mechanical properties of carbon nanotube/shape memory polymer nanocomposites

ArticleCOMPOSITE STRUCTURES. 81(2): 176-184 (2007)journal articl

Health checks through Landmark Bridges to sky-high structures

Author name used in this publication: Y. Xia2010-2011 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

Distributed strain sensor networks for in-construction monitoring and safety evaluation of a high-rise building

2012-2013 > Academic research: refereed > Publication in refereed journalVersion of RecordOthersP0000033, G-U845Publishe

High Quality Sensor Placement for SHM Systems: Refocusing on Application Demands

There are heavy studies recently on applying wireless sensor networks for structural health monitoring. These works usually focus on the computer science aspect, and the considerations include energy consumption, network connectivity, etc. It is commonly believed that for the current resource limited wireless sensors, system design could be more efficient if the application requirements are incorporated. Nevertheless, we often find that, rather than integration, assumptions have to be made due to lack of knowledge of civil engineering; for example, to evaluate routing algorithms, the sensor placement is assumed to be random or on grids/trees. These may not be practically meaningful to the respective application demands, and make the great efforts by the computer science community on developing efficient methods from the sensor network aspect less useful. In this paper, we study the very first problem of the SHM systems: the sensor placement and focus on the civil requirements. We first study the current general framework of structure health monitoring. We redevelop the framework that includes a new sensor placement module. This module implements the most widely accepted sensor placement scheme from civil engineering but focusing on its usefulness for computer science. It provides such interfaces that can rank the placement quality of the candidate locations in a step by step manner. We then optimize system performance by considering network connectivity and data routing issues; with the objective on energy efficiency. We evaluate our scheme using the data from the structural health monitoring system on the Ting Kau Bridge, Hong Kong. We show that a uniform and a state-of-the-art placement are not very meaningful in placement quality. Our scheme achieves almost the same sensor placement quality with that of the civil engineering with five-fold improvement in system lifetime. We conduct an experiment on the in-built Guangzhou New TV Tower, China; and the results valid- - ate the effectiveness of our scheme.Department of ComputingDepartment of Civil and Environmental EngineeringRefereed conference pape

Temperature effect on vibration properties of civil structures : a literature review and case studies

Author name used in this manuscript: Yi-Qing NiAuthor name used in this manuscript: You-Lin Xu2011-2012 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

Stress development of a supertall structure during construction : field monitoring and numerical analysis

Author name used in this manuscript: Yi-qing Ni2010-2011 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe