Structural systems, due to their inherent vulnerability, are at risk from aging, fatigue and deterioration processes due to aggressive chemical attacks and other physical damage mechanisms. The detrimental effects of these phenomena can lead over time to unsatisfactory structural performance under service loadings or accidental actions and extreme events, such as natural hazards and man-made disasters. The exposure to combined effects of discrete and continuous damaging events pose a major challenge to the field of structural engineering. The classical time-invariant structural design criteria and methodologies need to be revised to account for a proper modeling of the structural system over its entire life-cycle by taking into account the effects of deterioration processes, time-variant loadings, and maintenance and repair interventions under uncertainty. Despite these needs and recent research advances, life-cycle concepts are not yet explicitly addressed in structural design codes. Moreover, the level of structural performance is generally specified with reference to structural safety and reliability. However, when aging and deterioration are considered, the evaluation of the system performance should account for additional probabilistic indicators aimed to provide a comprehensive description of the life-cycle structural resources, such us redundancy, robustness and resilience. Based on these considerations and following the successful events organized at IALCCE2016 and IALCCE2018, the purpose of this IALCCE2020 Mini-Symposium is to present principles, concepts, methods, and strategies for measuring and evaluating the life-cycle risk, reliability, redundancy, robustness and resilience of deteriorating structural systems under multiple hazards, with emphasis on the interaction between seismic and environmental hazards.
Note: Mini‐Symposium organized 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 Structural System Performance Indicators.
The aim of this Mini-Symposium is to attract papers that deal with the use of advanced computational and/or experimental techniques for evaluating the life-cycle performance of aging structures and infrastructures in an aggressive environment. For these structures, multiple environmental and mechanical stressors lead to deterioration of structural performance. Such deterioration will reduce their service life and increase the life-cycle cost associated with maintenance actions. This Mini-Symposium covers current theoretical and experimental efforts made in the assessment and future prediction of performance, maintenance and strengthening of structures and infrastructures in an aggressive environment.
A main goal of vibration-based structural health monitoring and damage identification is assessed structural condition via vibration signatures. For civil structures response-only data is often used due to difficulties associated with forced excitation of large structures. This followed by inference of grey/black-box models, or updating of physics-based models. This mini-symposium welcomes novel contributions on vibration-based structural health monitoring, damage identification and parameter, input and load estimation, using black-box as well as physics-based models. Relevant topics include linear and nonlinear system identification, parameter and state estimation, model updating and correlation, optimal experiment design, and the exploration of novel sensing techniques.
Reinforced concrete (RC) structure has been extensively used in the civil engineering. However, owe to the corrosive medium in the atmosphere, underground water, sea water and deicing salt, durability and bearing capacity of the reinforced concrete structure are facing challenge. The service year of the RC structure cannot satisfy the designed service life. To this end, models and methods to describe the performance of concrete, steel bar and time-dependent reliability during structural life-cycle is the main topic. Those who have been working on related fields are cordially invited to exchange their ideas and research outcome in this mini symposium.
Due to the frequent occurrence of hazards and their effects on life-cycle performance, sustainability, risk, and resilience issues have become increasingly important. Considering climate change effects, hazard intensity and probability of simultaneous occurrence of multiple hazards are expected to increase. This mini-symposium brings together researchers from academia and industry to address problems of structural design, safety, and management under multiple natural hazards in a life-cycle context. Potential topics include: vulnerability and risk assessment, performance-based engineering, and hazard mitigation and management. Emphasis will be placed on topics dealing with effects of multiple hazards, climate change, risk assessment, cost-benefit analysis of adaptation, and life-cycle engineering. Practitioners as well as researchers in the areas of structural and sustainable engineering are encouraged to participate.
Structural health monitoring (SHM) systems target early indication of deterioration in structures and support implementation of remedial strategies before damage leads to structural failure. As a result, adoption of SHM applications in industry is on the rise, however, fast-developing SHM technology (e.g. recent growth in UAV applications), has not yet been widely accepted by practitioners and bridge owners despite significant research activity; this is affected by limited satisfactory results in real-world applications. The aim of this mini symposium is to provide a forum in which scientists and engineers from academia and industry can present their state-of-the-art research on novel SHM technologies, focusing on practical real-world applications and successes.
A large amount of civil infrastructure in the public domain has flood risk reduction, water management, navigation or mobility related functions, or a combination of these. Existing infrastructure generally has long life spans and is not always designed to adapt for changes in use, climate or regulations. A considerable part of the infrastructure is reaching the end of its service life. Considerable investments are required for building, renovating and maintaining these infrastructures.
This Mini-Symposium will focus on the life cycle assessment and management of infrastructure like dikes, bridge piers/piles, sluices, locks retaining walls, sewage and drinking water, harbor infrastructures, reservoirs and dams, etc; The focus of their management is shifting from condition and risk management, to predictive and adaptive management and from asset level to system or regional level. These trends require to search for smart solutions from technical, financial and governance point of view, to meet present day adaptive, societal and environmental requirements. The objective of this Mini-Symposium is to collect and exchange best approaches and innovative practices in Life-Cycle Engineering in water infrastructure.
The papers in this Mini-Symposium will show:
Presently, due to the advantages of composite structures they are widely used in bridge engineering. With the application of HPC, UHPC and HPS in composite bridge, this composite structures are endowed with new vitality and more convenient application. The Mini-symposia (MS) on Composite Structures will emphatically discuss some of key Issues related to study and advancement on life-cycle performance of steel-concrete composite structures and to share recent advancements. It will focus on:
A : Performance of new composite material and structures
B : Life-cycle behaviour and analysis of Steel-HPC and UHPC composite girder bridges and structures
C : R & D of new shear connector in composite structures
D : Fatigue performance of composite girders and structures
E: Durability of composite girders and structures
Keeping the function of buildings and infrastructures uninterrupted is of significance to their long-term service performance. As buildings and infrastructures are influenced by environment all the time, it is necessary to study the characteristics of environment and its possible effect on buildings and infrastructures. The concept of Value Protection of built environment deals with a number of uncertainties related to life-cycle and risk assessment and represents an interesting issue both for new buildings and infrastructures and for existing ones. For engineers as well as for any stakeholders involved in constructions process, this topic represents a real key-feature for a sustainable development, especially for seismic areas and, in general, for areas/single constructions exposed to extreme events (natural or caused by humans).
The aim of this Mini-Symposia is to bring together researchers in related field to share their accomplishments, findings and ideas. Contributions on but not limited to Value Protection, life-cycle management, sustainable development, and effect of extreme events on buildings and infrastructures are welcome.
Structures might deteriorate due to imprecise design, environmental erosion, excessive load, material aging, etc. This will cause the malfunction of the structures regarding the requirement of serviceability, performance and safety in the life cycle of structures. To prevent structural defect and even sudden failures of structures, different types of indices have been proposed to evaluate the condition of newly built or existing structures. Some latest findings on stress-based, deformation-based indices will be presented. The main content of the mini symposium is to exchange the state-of-the-art and effective indices for condition assessment of structures under practical scenarios and to compare them with other methods to assess structural safety, and the implications of different technologies for SHM. Practitioners and researchers are welcome to discuss and share experience.
Water is one the most important resources to the national economic and social developments. The hydraulic engineering provides reasonable and effective distribution and utilization of water resources to the national economy. This SS is proposed to discuss and share recent academic research work and project studies in the field of hydraulic engineering.
The topics of this SS include, but no limited to,
Current practice on the assessment of existing concrete structures subject to aging, deterioration and damage processes often lacks thorough life-cycle reliability and risk-based evaluations. The assessment is often performed on the basis of guidelines which rely on the (subjective) experience of the investigator and improvements are necessary to quantitatively incorporate in this process available data and results from inspection, monitoring and/or laboratory investigations.
In this mini-symposium, focus is given to new developments in relation to:
The mini-symposium will also report on advances and new developments within fib and SEI/ASCE technical committees working on life-cycle assessment of existing concrete structures.
As so called “40%” sector, built environment (buildings and infrastructure) are identified as a key sector to global warming mitigation. Recently, Building information modelling (BIM), IOT, and AI, are proposed to improve the efficiency for construction and running built environment. The built environment, in particular, needs big data tools and architectures for to extend service life and minimize the life cycle energy and emissions. Digitalization of built environment will play an important role to achieve UN SDG 9, 11, and 12. As such, this MS will invite multidiscipline studies to discuss “how digitalization can support decarbonization of built environment with life cycle perspective”.
Transportation networks, including bridges, railways, tunnels, subways, utilities, dams, pipelines, power transmission systems, communication networks, etc. are fundamental for the economy in all the world. Unfortunately, in most of the countries, a big amount of them is reaching the end of their nominal life due to deterioration of the construction materials and in particular of corroded rebars in reinforced concrete structures. This Mini-Symposium aims to share the recent advances and code implementations in assessing, simulation, repair and retrofit of aged infrastructures. It is intended to cover the following key topics (but not limited to): monitoring, identification, assessing of corrosion, material deterioration, modelling, codes, repairs and retrofitting strategies, techniques to reduce corrosion.
Tunnel is a typical traffic infrastructure, which is more complex than other infrastructures such as highway and bridge, because of the variety of equipment and complex spatial structure. Thus, there are many challenges in life cycle management of tunnel. This Symposia will invite five speakers to introduce the newest research result from automatic inspection and analysis technology of tunnel defects, tunnel spatio-temporal data organization, life-cycle oriented Operation & Management information platform framework and the data-driven tunnel life-cycle evaluation and decision-making. Meanwhile, this symposia will also discuss the application effect of these technologies in Hangzhou Wenyi Road Underpass and Shanghai Dalian Road Tunnel.
Conference Secretariat IALCCE 2020
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