【SS01】Vibration-Based monitoring and damage identification for bridges
Necati CatbasUniversity of Central Florida Orlando, Florida, USAcatbas@ucf.edu
Several monitoring systems installed on bridges utilize real-time or near-real-time responses for collecting vibration data to make informed decisions related to the health of the structure. The possibility to assess the health state based on data recorded on the monitored structure opens new avenues in maintenance policies, shifting from a traditional ‘scheduled maintenance’ to a ‘condition-based maintenance’, carried out ‘on demand' or ‘automatically’, based on the current structural condition.
The aim of this special session is to report on recent advances and successful applications of Vibration-based Structural Health Monitoring (SHM) and damage identification for bridges. The session welcomes contributions that cover, but are not limited to, theoretical developments, computational issues, experimental techniques and tools for health monitoring, real world applications, integration of SHM in procedures for risk assessment and decision-making.
The expected attendance of IABMAS 2020 by key players on the development and on the application side will ensure that this session offers a real state-of-the-art view of SHM while providing a venue for exchange and share new ideas, as well as a chance to establish and enhance future collaborations on this subject.
【SS02】Cracking simulation and measurement of concrete structures
Concrete cracking is an important issue in safety, functionality and durability of bridges. The focus of this special session is to share current work on how simulations and measurements can improve bridge assessment and management. Potential topics can include advances in different calculation models (e.g. FEM, FDM, BEM, RBSN) and experimental techniques (e.g. impact echoes, ultrasonic waves, acoustic emission, radar or thermographic inspection, digital camera images). Particularly encouraged papers are oncross topical boundaries, such as the use of non-destructive measurements to augment or validate multiscale or discrete models. Papers exploiting advanced calculation or experimental techniques are also encouraged.
【SS03】Steel bridge rehabilitation
In this special session, papers on evaluation, assessment, repair and retrofit of fatigue and corrosion damage in steel highway and railway bridges are presented and discussed. We have a huge number of steel highway and railway bridge structures especially in the urban area and across rivers and straits. Some of those bridges suffer various types of fatigue and corrosion damage, but replace of them should be too expensive, and restriction or close of the traffic could be hardly allowed. Therefore, rehabilitation of those structures becomes of great importance in the very near future.
【SS04】Bridge design-Maintenance and monitoring practices around world
Necati F. CatbasUniversity of Central Florida Orlando, Florida, USAcatbas@ucf.edu
With the development of technology and increasing communication, traveling has increased. This requires more comfortable infrastructures. As a result, there has been an increase in the number of long span bridges. New approaches have been adopted in the design of many new mega projects. In addition, increased number of bridges has led engineers to identify more systematic methods for their maintenance. For this purpose, new approaches at maintenance and structural monitoring have been developed.
In this session, mega projects and their design-maintenance and structural monitoring approaches in different countries will be discussed. The advantages and disadvantages of the methods that used will also be shared.
【SS05】Soil-steel composite bridges and culverts: testing and numerical analysis
The soil-steel bridges and culverts constitute more and more often an element of transportation infrastructure in various parts of the world. For this reason, the special session fits in the actual trends in bridge engineering. Soil-steel bridges are built mainly for economic reasons and they are getting more often used as all kinds of bridge crossings, especially of medium span (10-30 m) and in locations where short construction time and road or railway traffic continuity is required. They constitute a perfect alternative for traditional bridges of concrete or steel. The discussed structures, due to their characteristics, i.e. flexible steel structure, interaction with backfill, can transfer very heavy live loads caused by vehicles travelling along them. However, there are many problems and unknown factors related to designing of soil-steel bridges because of loading, for example, with backfill, static, dynamic, fatigue caused by normal service loads as well as seismic and para-seismic loading. Besides, standards used to design soil-steel bridges are based on conservative assumptions, which is the reason why the structures are often overdesigned.
【SS06】Developments and trends in hybrid structures
Itaru NishizakiPublic Works Research Institute, Japan
Hybrid structures aiming at the reduction of the constructional and maintenance cost, improvement of constructability and construction period are widely used throughout the world in infrastructure, building and so on.
On the other hand, there are many existing structures which are severely damaged due to fatigue or corrosion problems. Hybrid structures are also applied to rehabilitation and strengthening methods for these damaged structures, especially using new materials such as Fiber Reinforced Polymer.
This Special Sessions aims to provide an overview of some of the recent research carried out in this field dealing with new structural systems, repair and strengthening methods, innovative shear connection and design or construction methods.
【SS07】Numerical simulation technique in life-cycle design and maintenance of bridge
Performance deterioration models are essential to the life-cycle design and maintenance strategy of bridges. The numerical simulation technique provides an efficient and flexible approach to develop advanced and objective deterioration models for different kinds of performances, e.g., safety, serviceability, durability. With the numerical simulation method, it is possible to optimize the key design parameters and estimate the perfect timing for the maintenance work. This SS is proposed to discuss and share the recent advanced numerical simulation technique for concrete, steel, and other kinds of bridges. The topics include but not limited to the harmful substance transport, steel corrosion, facture and cracking.
【SS08】Approaches to bridge management / Bridge management systems from around the world
This Special Session is organized by the IABMAS Technical Committee on Bridge Management and focuses on approaches to Bridge Management / Bridge Management Systems from around the world. It will highlight approaches to risk management / risk-based decision making, measuring and reporting performance, and long-term cost analysis and how these approaches can benefit bridge owners. Papers describing experiences and lessons learned in new BMS implementation projects from around the world are encouraged.
The participation of Bridge Management and BMS experts from around the world will ensure that this session offers a real state-of-the-art view of the topic while providing a venue for exchange and sharing of experiences and new ideas.
【SS09】Standardization of quality specifications for highway bridges
Quality specifications (QS) for highway bridges are normally stored in Bridge Management Systems (BMS) and should be considered during the implementation of asset management strategies and maintenance actions to keep assets at desired performance levels. Performance indicators and performance goals are stablished for components. These indicators allow to assess if quality control plans are accomplished. One problem in the application of QS to a large highway network is their lack of homogeneity due to different quality standards assumed by different owners/operators. The objective of the special session is to know how this lack of homogeneity can be solved through standardization efforts and how different countries/owners have dealt with the problem around the world. In particular, the recent experience developed in Europe through the work carried out in the Action COST TU-1406 (Quality Specifications for Roadway Bridges, Standardization at a European Level) will be presented, showing how practical guidelines for quality control were stablished as well as the necessary steps to follow leading to the standardization of the proposed quality specifications.
【SS10】Locks inspection in Brazil
Karoline Brasileiro Quirino LemosBrazilian National Department of Transportation Infrastructure (DNIT), Brazil
Taiza Reis Dantas de SordiBrazilian National Department of Transportation Infrastructure (DNIT), Brazil
Eliezé Bulhões de CarvalhoBrazilian National Department of Transportation Infrastructure (DNIT), Brazil
Gleison de Sousa SantiagoBrazilian National Department of Transportation Infrastructure (DNIT), Brazil
The Brazilian National Department of Transportation Infrastructure (DNIT) is responsible for the design, construction, operation, and maintenance of federal waterways in Brazil, including lock and dam infrastructure on federal waterways.
DNIT is currently responsible for the operations and maintenance of eight existing locks on federal waterways. To ensure sustained operations of the existing navigation locks, DNIT plans to establish an asset assessment and inspection program.
The purpose of the inspections is not for dam safety, but specifically focused on operational and maintenance aspects of the various systems of the lock and dam facility: hydraulic, electrical, mechanical, structural, and other systems.
The overall objective of this scope of work is developing specifications to inspect the locks within the Brazilian navigation lock. To accomplish this objective, US Army Corps of Engineers (USACE) and DNIT, an Intergovernmental Partnership Agreement, performed an inspection on one of the locks in the Rio Grande do Sul system and subsequently develop recommendations for the inspection that DNIT will develop in the future.
【SS11】Sustainable marine structures
Nguyen Thanh TrungUniversity of Transport and Communications (UTC), Vietnamnttrung@utc.edu.vn
Marine structures are frequently subjected to harsh environment and many types of deterioration and damage can occur. In order to keep the structural performance above requirements, appropriate maintenance and management of marine structures are necessary. The design method considering service life is also necessary to prevent such deteriorations in advance. This SS is proposed to share recent advancements of maintenance and management of marine structures as well as design considering maintenance. All the relevant topics on marine structures are within the scope of this SS, which will contribute to sustainable marine structures.
【SS12】Life-cycle redundancy, robustness and resilience of bridges and infrastructure networks under multiple hazards
Notable events of bridge collapses due to accidental loads, environmental aggressiveness and related phenomena, such as corrosion and fatigue, indicated structural redundancy and robustness as key factors for a rational approach to life-cycle design of deteriorating bridges and infrastructure systems. Structural resilience is also an important indicator in bridge engineering to express the capability of bridge structure and infrastructure systems exposed to extreme events, such as earthquakes, to withstand the load effects and to recover efficiently the original configuration. However, the concepts of redundant, robust and resilient structure and infrastructure systems, or damage-tolerant systems, are still issues of controversy, since there are no well established and generally accepted criteria for a consistent definition and a quantitative measure of these performance indicators. The aim of this Special Session is to present advances on this subject and to provide conceptual and analytical design tools that can effectively be implemented in design practice for measuring and evaluating the life-cycle redundancy, robustness and resilience of bridge structures and infrastructure networks under multiple hazards, with emphasis on the interaction between seismic and environmental hazards in aggressive environments.
Special Sessionorganized on behalf of the SEI/ASCE Technical Council on Life-Cycle Performance, Safety, Reliability and Risk of Structural Systems, Task Group 2 on Reliability-Based Performance Indicatorsfor Structural Systems.
【SS13】Application of vehicle-bridge interaction to bridge maintenance and safety
The primary function of a bridge is to carry traffic. Vehicle load is one of the major live loads for bridges. The research on the interaction between the bridge and vehicles is very essential to maintain the safety and integrity of bridge structures. Research such as the traffic load identification, bridge damage detection, and structural performance assessment are all related to vehicle-bridge interactions. In this special session, we will focus on the discussion of the vehicle-bridge interaction (VBI) and its applications in bridge maintenance and safety, including but not limited to vehicle-bridge-wind interaction, bridge-weigh-in-motion (BWIM) technology, VBI-based damage detection and health monitoring, vehicle-induced bridge fatigue assessment.
【SS14】Deterioration modelling and structural reliability analysis of bridges
Deterioration is the most common cause of serviceability or ultimate failure of bridges. In this special session advances in deterioration modelling of steel and concrete bridges will be presented. The results of lab experiments and field monitoring from different projects which observe and model the progress of deterioration (such as corrosion, crack growth, etc.) will be shared and discussed.
Accurate structural reliability analysis of in-service bridges is vital for efficient maintenance and management of these assets. Novel ideas/methods for structural reliability analysis and service life prediction of different bridge types will also be discussed through the selected technical papers.
【SS15】Constructability difficulties of bridges and solutions
Bridge structural elements are often analyzed considering stages of construction for loadings or stresses that are not present in the completed, in-service structure. Structural systems, construction methods, and project constrains employed today presents many challenges requiring change orders or leading to failure conditions of the bridge and/or components. Constructability is especially critical during accelerated bridge construction where bridge may need to be moved to alignment before critical components such as cables, diaphragms and main girders with incomplete posttensioning are incorporated. Articles of interest includes constructability related issues including failures, analysis tools and procedures, contracting methods, and specifications to assure constructability.
【SS16】Bridge structural health monitoring for infrastructure management
The Special Session on Bridge Structural Health Monitoring for Infrastructure Management will bring together leading academics and practitioners from the fields of smart infrastructure, structural health monitoring and infrastructure management. The Special Session will reflect the advances and current challenges in bridge structural health monitoring and asset management. Contributions on investigations related to the theoretical development, experimental studies and particularly practical applications of structural health monitoring techniques will be incorporated in the Special Session.
【SS17】Surrogate modeling and machine-learning applications for bridge vulnerability assessment and uncertainty quantification
Satisfactory predictions of bridge vulnerability under environmental, natural, man-made, or even multi-hazard threats continue to pose a challenge in terms of computational complexity. Uncertainties associated with hazard modeling and other input parameters that define realistic bridge models, often lead to intractable number of simulations to fully encompass the error domain. Consequently, surrogate models or metamodels rooted in machine-learning techniques can be utilized for prompt vulnerability estimation without significant compromise on accuracy. This special session invites contributions towards utilizing metamodeling techniques for risk and reliability assessment of bridge structures as well as propagation of uncertainty from input parameters to output predictions.
【SS18】Monitoring techniques and their interpretation for the integrity assessment of bridges
Over the last years, various monitoring techniques have been developed and applied in the assessment of bridges. They are frequently referred as “structural health monitoring”. But how far are we with these techniques? How should we implement the information obtained by the monitoring techniques to evaluate the bridges? This session aims at bringing together international experiences related to bridge monitoring and focuses on assessment of bridge safety supported by monitoring. Presentations are solicited that address the following topics: monitoring techniques concerning bridge conditions or traffic loading, monitoring during load testing, development of safety indicators supported by monitoring techniques.
【SS19】Application of UHPC for bridge structures
Ultra-high performance concrete (UHPC) is a cement-based composite material with compressive strength greater than 120 MPa, good ductility and excellent durability. It has been attracting wide attention worldwide due to its excellent performance, and has been widely applied for not only bridges but various types of infrastructure in many countries. This session focuses on the recent applications and developments of UHPC in science and practice and to make clear the perspective in the future regarding maintenance, safety and management of bridges and civil infrastructure. Codes and specifications of UHPS applications for bridges are also discussed.