Organized Session (1)

Mitigation of risk due to natural hazards

ORGANIZER(S)

Claudio Borri	Udo Peil

Organized Session (2)

Probabilistic design of wind turbines

ORGANIZER(S)

John Dalsgaard Sorensen

ABSTRACT
Wind energy is an important source for sustainable energy production. Wind turbines are series produced whereas most civil engineering structures are one-of-a-kind. The series production and following Type Approval allow for a more refined reliability assessment. It should however be noted that in several aspects wind turbines are more complicated than civil engineering structures in general because wind turbines can be considered as a machine where the control system influences the magnitude of the loads. The following ‘probabilistic’ aspects are important examples for cost reduction of wind turbines: Modelling of uncertainties (site assessment, offshore wind farms, fatigue, …); Reliability-based cost-optimal design; Risk-based planning of operation and maintenance.

Organized Session (3)

Construction risk and safety management

ORGANIZER(S)

Katsutoshi Ohdo	Tetsuo Hojo	Michiyuki Hirokane

ABSTRACT
Construction accidents, such as a fall from structure and a collapse of structure during construction, are mainly caused by the human factors, the mistakes of construction plans, or the construction errors, etc. Especially, a decrease of the number of skilled workers is a serious problem, and the importance of safety management becomes greater for reducing the construction risk. The objective this organized session is to discuss the safety construction that is not depend on the worker’s skill, and this session includes the construction risk and the safety education and management.

Organized Session (4)

Risk evaluations of geotechnical and geo-environmental problems

ORGANIZER(S)

Yusuke Honjo	Achintya Haldar	Takeshi Katsumi	Shin-ichi Nishimura

ABSTRACT
Recently, the idea of the life-cycle cost (LCC) is getting important on the maintenance of geotechnical structures. Optimum maintenance plans should be determined based on the minimization of the LCC. The risk evaluation is an important part of LCC for the deterioration of structures and the natural hazards. Risk evaluation is also important in the geo-environmental problems related to the pollution of the ground and subsurface water, and the safety control of landfills. The general expression of the risk and the evaluation methods on these problems are discussed in this session.

Organized Session (5)

Vulnerability and Robustness of Structures

ORGANIZER(S)

Jitendra Agarwal

ABSTRACT
Robustness is an important attribute of a structure which relates to its ability to fulfil its function in the face of uncertain and adverse conditions such as the loss of a component or abnormal changes in the demands on it. It also implies the ability of a structure to avoid disproportionate consequences in relation to the initial damage. A structure which is vulnerable in any one way cannot be robust. There are many practical ways to design in robustness but it is difficult to quantify robustness. In the proposed session, some of the current research on these very issues will be presented.

Organized Session (6)

Nonlinear stochastic dynamics of structures with uncertain mechanical and geometric properties
[Session organized on behalf of IASSAR Subcommittee SC1]


ORGANIZER(S)

George Stefanou	Michalis Fragiadakis	Manolis Papadrakakis

ABSTRACT
The accurate and efficient prediction of the nonlinear dynamic response of structures with uncertain system properties poses a major challenge in the field of computational stochastic mechanics. Current research efforts concentrate on the development of new and the improvement of existing methods in order to meet the needs of engineering practice. This session aims at bringing together scientists and engineers to efficiently assess the nonlinear dynamic response of complex uncertain structural systems. Papers on nonlinear modeling, enhanced stochastic finite element techniques and on the application of existing methods (e.g. perturbation, equivalent linearization, response surface) to the solution of realistic nonlinear dynamical problems, are equally welcomed for presentation in the session.

Organized Session (7)

Performance-based Design for Steel Structures

ORGANIZER(S)

Sang-Hyo Kim

ABSTRACT
Recently, steady movements toward the performance-based design (PBD) for civil infrastructures have been initiated in many countries. The realm of the performance-based design is broad from revising the design practice based on the NKB level system to designing structures based on long-term nonlinear inelastic performance including maintenance effects. This mini-symposium has been organized to bring and share the knowledge on the performance-based design for steel structures. Theoretical, computational, and practical contributions are all welcomed. Especially, efforts and contributions on developing design guidelines and specifications for the performance-based design are cordially invited.

Organized Session (8)

Machine learning in structural reliability and probabilistic mechanics

ORGANIZER(S)

Maurice Lemaire	Jean-Marc Bourinet

ABSTRACT
In recent years, there have been an increasing number of applications of machine learning tools such as Neural Networks and Support Vector Machines to solve probabilistic problems. The concept has moved from planning a full batch of numerical experiments, which is optimal with respect to some given criteria such as in classical experimental designs, to placing numerical experiments sequentially and wisely, based on updates of the learning algorithm. This session aims at showing the ability of these learning tools to deal with problems specific to the probabilistic community, ranging from sensitivity analysis, reliability assessment to reliability based design optimization. Papers will give details about the way active learning schemes are set up, how they perform on complex probabilistic problems (systems, multiple design points, discontinuous limit-state functions, etc), how they are capable of handling large numbers of random variables and what is gained in terms of total number of experiments required for a given accuracy of the results, in comparison to other methods. Papers will be illustrated on at least one computationally challenging engineering application.

Organized Session (11)

Health Monitoring, Structural Monitoring & Control

ORGANIZER(S)

Akinori Nakajima	Takashi Obata

ABSTRACT
It is possible to measure the adequate behavior of the structures by the various methods and to deal with the massive amount of data, by means of the significant progress of the measurement techniques and the digital analysis method employing computer. Therefore, it is also possible to recognize the actual and detailed condition of structures by using monitoring data and their analytical data. Health monitoring, structural monitoring and control is the important issue of the design and management of the various structures from the viewpoint of the structural safety, reliability, and to construct intelligent structures in futures. The objective of this organized session is to discuss the fundamental and practical research related to the above field.

Organized Session (12)

Inspection and Analysis of Concrete Bridges in Coastal Environments

ORGANIZER(S)

Motoyuki Suzuki	Ichiro Iwaki	Hiroaki Tsuruta

ABSTRACT
Many concrete bridges constructed in coastal environments have been severely damaged by chloride-induced corrosion of reinforcing steel in concrete. In order to solve this problem, it is necessary to inspect and analyze the properties of concrete and steel in the practical deteriorated bridges. In this session, the field inspection methods of deteriorated bridges and the analyses in the properties of concrete and steel, and in the load-carrying capacity of the members’ are discussed. Further, the strategies to utilize the results obtained for evaluating structural safety and reliability in bridge management system are discussed.

Organized Session (13)

Novel Approaches for Reliability Analysis and Statistical Structural Health Monitoring

ORGANIZER(S)

Mohammad Noori	Zhikun Hou

ABSTRACT
Structural reliability and safety play an important part in design of different engineering structures. Significant advances have been made in incorporating and consideration of reliability and uncertainty analysis in a wide range of engineering disciplines and practices. Recent developments in both diagnostics and computational methodologies allow us to model and solve more and more complicated problems. The objective of this session is to share the latest developments in the areas of structural health monitoring and reliability and demonstrate that the methodologies developed in two distinct areas have applications in both fields and collaboration of the researchers in these fields can address many of the challenges that may not have been addressed and yet are important for the further advancement in both areas, e.g., assessment of the uncertainties and reliability of sensing technologies for structural health diagnostics, and reliability assessment of damaged structures, etc. It is our hope that the session will facilitate collaborations between the researchers in the fields of structural reliability and health monitoring.

Organized Session (14)

Non-destructive testing of concrete structures

ORGANIZER(S)

Toshiro Kamada	Mitsuyasu Iwanami

ABSTRACT
For reasonable maintenance of concrete structures, to develop inspection system is very important.　However, in the present status, only visual observation is generally used.　Visual inspection is the easiest and the most fundamental method. But it dependent on personal experience, and not quantitative, information only from the surface can be obtained. So, nondestructive testing is needed. If NDT’s were utilized, information about defects or deterioration as quantitative data can be obtained. Also NDT’ were used, abnormal portions can be detected in earlier stage. Then repair costs can be reduced and accidents caused by delamination of concrete cover and so on. Moreover, no damage of structures and no traffic break are not caused. Consequently, NDT play important role of maintenance of structures. Here roll or effectiveness of non-destructive methods of concrete structures for better maintenance actions will be discussed in this session.

Organized Session (15)

Challenging Technology for Condition Screening of Bridge Structures

ORGANIZER(S)

Mitsuo Kawatani	Chul W. Kim

ABSTRACT
This organizing session will discuss challenging technologies focused on condition screening of bridge structures. Bridge structures constitute the most vulnerable element of the transportation infrastructure. Maintaining or improving condition of bridge structures is critical to the structural integrity and cost effectiveness of the transportation system. Detecting proper information about current condition of the bridge structure is indispensable to the decision making in relating to maintaining or improving the bridge structure. The prospective papers in this session will address those emerging technologies, novel ideas or applications to identify the current condition of bridge structures.

Organized Session (16)

Safety prediction and evaluation of wind-induced phenomena

ORGANIZER(S)

Hitoshi Yamada	Hiromichi Shirato

ABSTRACT
Technical issues related to wind engineering are still remaining in various aspects such as in designing engineering structures, in keeping safety of engineering system, in mitigating wind hazard, and in controlling wind environment. This organized session aims to exchange current scientific information concerning how to predict the aerodynamic behavior of structures and wind environment in different scale to ensure their safety based on bluff body aerodynamics, fluid mechanics, meteorology, etc. Wind-related contribution will be also highly encouraged including monitoring, sensing technique, typhoon/hurricane/cyclone, tatsumaki/tornado, downburst, vibration control, aerodynamic tuning, wind disaster mitigation, transmission lines, vehicle, train, flying debris, design criteria and codification.

Organized Session (18)

Seismic risk assessment and information

ORGANIZER(S)

Yasuhiro Mori	Nicolas Luco

ABSTRACT
In order to mitigate seismic risk efficiently and effectively, practical alternative means and strategies should be identified. Current risk levels and the effects of the alternatives, as well as the associated costs, should be assessed. The results of the assessment should be appropriately conveyed to the decision-maker, such as an individual owner of a house/building, a private company, or a local government. The prospective papers in this session will present new methodological developments, novel ideas, and/or applications related to seismic risk assessment and information for supporting decision making.

Organized Session (21)

Developing Perofrmance-based Concrete Design Code

ORGANIZER(S)

Hasun Jeong

ABSTRACT
National design codes and specifications, in recent years, are shifting from prescriptive-based to performance-based concept. The motives for making this move are that harmonization with global trend (WTO and ISO), fast-track introduction of innovative and cost-effective methods into design and exection, and accountability and freedom of information on all public decisions. A session is organized to facilitate the development and adoption of reliable performance-based design codes and specifications for concrete engineering. In the session, the techniques and procedures for model codes, specifications, and guidelines for performance-based concrete engineering would be discussed.

Organized Session (23)

NEW METHODS FOR NON-GAUSSIAN AND PULSE PROBLEMS IN STOCHASTIC DYNAMICS
[Session organized on behalf of IASSAR Subcommittee SC2]

ORGANIZER(S)

Radoslaw Iwankiewicz

ABSTRACT
This mini-symposium will focus on new concepts and developments in particular subject areas of stochastic dynamics: non-Gaussian excitation and response processes and problems of impulse/pulse process excitations. In recent years a significant amount of research has been done on such problems as for example Levy alpha-stable excitations and non-Poisson, renewal impulse process excitations. The progress has been achieved e.g. in the moment equations technique, the generalized Fokker-Planck-Kolmogorov equation approach the path integration techniques. The purpose of this mini-symposium is to give account of and exchange new concepts and methods in these subject areas. Papers presenting developments of methods or novel applications will be welcome.

Organized Session (24)

Mechanics of Random Media

ORGANIZER(S)

Lori Graham-Brady	Sanjay Arwade

Organized Session (25)

Monitoring Performance under Uncertainty

ORGANIZER(S)

Dan M. Frangopol	Alfred Strauss

ABSTRACT
A practical predictitive tool for cost, safety and condition for bridge managers can be guaranteed by the inclusion of monitoring data into life-cycle management (LCM) models and structural health monitoring. (SHM). SHM effectively captures structural behavior and load demands, but is not as effective in translating this information into actionable information. The efficient combination of LCM and SHM within the framework of monitoring will provide the emphasis of advantages and the diminishing of disadvantages. In addition, the reliability and lifetime assessment are becoming more significant for current and predictive statements, based on monitoring and advanced assessment tools, in case the monitoring system disposes of (a) robustness in data collection and data management, (b) redundancy in the system (e.g., parallel, serial systems), (c) resistance against deteriorating data (loss of information) deteriorating components and deteriorating information transfer, and (d) optimized configuration of networks consisting of several specialized sensor types and their locations (e.g. chemical, physical and mechanical quantities).
This Organized Session intends to present approaches, developments and novel solutions for the smart incorporation of monitoring in reliability assessment procedures of structures. The importance of the interaction between well configured monitoring networks, SHM and LCM models, and reliability assessment procedures will be emphasized.
Keywords: Novel probabilistic assessment methods; optimized monitoring

Organized Session (26)

Safety assessment of Offshore and Marine Structures

ORGANIZER(S)

Masahiko Fujikubo	Norio Yamamoto

Organized Session (27)

ORGANIZER(S)

Osamu Maruyama

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