Special Sessions

 

SS1: Recent advances in railway system monitoring in China

Organisers:
Professor Yanlian Du, Shijiazhuang Tiedao University
Professor Weigang Zhao, Shijiazhuang Tiedao University

Description:
With the development of high speed railway in China, the operational safety of the railway system becomes a big challenge. The rail track is subjected to various temperature and vehicular loads and it may induce the damage in the track, especially the ballastless track system. How to monitor and assess the condition of the railway system is a hot research topic. This special session is to invite the experts in this area to present their recent achievements in advanced railway system monitoring.

 

SS2: Case studies and new methods for modal-based SHM of civil structures

Organisers:
Dr. Carlo Rainieri, University of Molise, Italy
Dr. Andy Ngyuen, Queensland University of Technology, Australia

Description:
Structural Health Monitoring of civil structures has significantly evolved over the last decade as a result of the growing interest from academy and industry for its potential benefits and savings. In particular, modal-based SHM is rapidly spreading thanks to the development of reliable automated operational modal analysis procedures. Data and information provided by advanced modal-based SHM systems are also of primary importance to enhance the knowledge about the dynamic and seismic behavior of civil structures, eventually with the support of calibrated numerical models. A number of applications are already reported in the literature, pointing out the relevance of modal-based SHM for real-time post-earthquake assessment of structures as well as to define appropriate maintenance strategies shifting from ‘scheduled maintenance’ to ‘condition-based maintenance’.

The aim of this Session is to report recent advances in modal-based SHM of civil structures, and successful applications to buildings, bridges, historical structures, dams, wind turbines, etc. It covers theoretical and computational issues, applications in earthquake engineering, methods for damage detection, methods for compensation of the influence of environmental and operational variables on damage features, uncertainty quantification in model selection and parameter estimation, theoretical and experimental system identification for systems with uncertainty. Moreover, taking into account recent hardware trends in SHM related to the use of high-rate GPS receivers, laser vibrometers, microwave interferometry (radar) and optical fiber sensors (OFS) for dynamic strain and temperature measurements, dedicated signal processing algorithms and optimal sensing strategies for structural dynamics applications and modal-based SHM based on those new sensing techniques are of interest.

The Session will provide a venue to exchange information about ongoing developments and to discuss successful applications of modal-based SHM in civil and earthquake engineering. Papers dealing with experimental/field investigations and verification of theories are especially welcome.

 

SS3: Optical based monitoring techniques for infrastructural maintenance and safety

Organisers:

Dr Paul S. Sumitro, SMARTSENSYS, USA
Professor Hiroshi Matsuda, Nagasaki University, Japan

Description:

Strain, stress, displacement, tilt and vibration measurements are commonly performed to acquire structural degradation information during infrastructure inspection. In conventional strain and displacement measurements only certain point and limited directions can be conducted, complicated wiring work and system design are required to obtain multiple points information. Therefore, various optical inspection methods such as strain visualization sheet, digital image correlation method, digital holography, and sampling moire method have been developed to obtain planar strain information efficiently and rapidly. Moreover, to avoid rope-work and scaffold near dangerous and critical location 3D laser scanner, UAV and robotic base 3D photograph measurement techniques have been developed to capture and analyze structural deterioration information. By these means, it is possible to eliminate variations in visual inspection, to increase inspection frequency due to low cost inspection, and to obtain structural deficiency quantitative data.

In this session, we will focus discussion on the effectiveness and usefulness of optical based monitoring techniques for infrastructure maintenance and safety.