Especially welcome are papers on recent and ongoing research and papers of multi-disciplinary and multi-scale nature. Rail tracks represent an important backbone of a modern and sustainable society with an awareness of ecological responsibility. It is predicted that in the near future rail-bound transportation will be one of the driving means of economic growth with enhanced performance and interconnectivity, as well as higher traffic volume.
The space requirement for new rail lines is expected to compete with the construction development, and thus, the distance between rail tracks and urban areas will decrease. These aspects impose new challenges to the engineers, requiring outstanding solutions such as high-speed and silent trains, reliable and cost-friendly bridge structures, rail tracks with low maintenance efforts and so forth.
Many of these issues are regulated in guidelines and codes of various disciplines as, for instance, rail track engineering, design of bridge structures, and acoustics. In specific cases, simplified codified procedures result in over-conservative i. For all these reasons the need of more realistic approximations in track engineering is emerging. The scope of this minisymposium is to provide a forum for discussing recent advances in simplified yet accurate modelling of problems in rail track dynamics as well holistic computational approaches related to vehicle-track-soil interaction, vehicle-track-bridge interaction, structure-borne and air-borne noise, as well as ground-borne noise and vibration.
Presentations of experimental, analytical and numerical findings, are highly welcome along with opinion papers on recent advances and future challenges. After the striking of damaging earthquakes, the civil protection, administrators and the engineering community have to respond to a series of successive emergencies. In the aftermath of the event there is the need to rapidly proceed with building tagging, usually relying on the judgment of experts that give their opinion on building safety level and related usability after visual inspection.
Also it is crucial to verify the functionality of main infrastructures e. On the other hand, when the reconstruction process starts, smooth resolutions on fate of damaged buildings are crucial to avoid further delaying of an already complex process towards effective recovery. On the other hand, also simplified methods based on static nonlinear analyses or on equivalent systems, can give useful indications on the residual capacity and the safety variation for damaged buildings and infrastructures.
The objective of this mini-symposium is to share and discuss research results and ideas on currently available procedures and their applicability in the field of post-earthquake assessment. Relevant topics include, but are not limited to, evaluation of aftershock fragilities for buildings or infrastructures, simplified methods for assessment of post-earthquake behavior and safety, damage, costs and reparability.
Existing structures designed without modern seismic design provisions represent one of the largest seismic safety concerns worldwide. Such structures are vulnerable to significant structural and non-structural damage and even collapse when subjected to medium-to-strong ground shaking. This resulted in number of fatalities and significant economic losses, which promoted the development of seismic assessment and retrofit procedures for existing structures. Recent massive reconstruction processes pointed out the need for new, practical, and cost-effective seismic strengthening solutions.
Over the past three decades, several techniques emerged. However further research effort is needed to improve their effectiveness, develop new applications, numerical modelling, design procedures, and techniques for installation. In this context, the mini symposium intends to attract academic staff, researchers, post-graduate students and professional engineers dealing with seismic repair and retrofit of structures, such as buildings and bridges, with innovative materials or with innovative seismic devices.
Conservation and preservation of historical buildings in seismic zone are still today scientific research challenges. Within this context, the understanding and prediction of the structural response of heritage constructions subjected to seismic loads play a fundamental role. At the same time, this aspect represents a crucial task due to the complexity of the constituent materials, mostly characterized by masonry.
Looking for other ways to read this?
Masonry is a heterogeneous material which behaviour depends on several features: mechanical characteristics of matrix and inclusions, interface properties, in-plane texture, out-of-plane composition, etc. In this perspective, during the last decades the scientific community has developed different approaches, to achieve a consistent description of historical masonry constructions. The aim of this mini-symposium is to discuss the new advances in modelling of masonry material with specific applications to historical masonry monuments.
Topics to be covered, but not limited to, are:. The interaction of earthquakes with the complex and vulnerable socio-economic system of exposed communities often results in damage and loss, sometimes with catastrophic consequences. As also strongly stated by the Sendai Framework for Disaster Risk Reduction, understanding disaster risk is the first priority in the pursuit of a global strategy for risk reduction.
Furthermore, the implementation of risk monitoring and early warning systems is one of the viable solutions to actively prevent or reduce damage to specific structures, or even to whole regions. The determination of seismic risk is the foundation for risk mitigation decision-making, a key step in risk management. Large corporations and other enterprises e. When assessing the seismic vulnerability of buildings it is essential to first establish the project objectives, before subsequently choosing the most appropriate strategy and tools necessary for building assessment and fulfillment of these objectives.
It is also extremely important to understand the difference between the detailed approaches used for individual building assessment and those methods most efficient for larger scale analysis, pursued for city center assessment. While the latter results can be used as a general measure of seismic risk for different types of buildings, the actual seismic risk for any individual building may vary considerably and will depend upon its exact configuration and condition.
Structural Dynamics - Recent Advances | G.I. Schueller | Springer
This Minisymposium will deal with:. The objective of this symposium is to discuss new advances in numerical methods for linear and non-linear dynamics and wave propagation. Topics of interest include, but are not limited to: new space and time discretization methods for dynamical systems; high-order accurate methods including finite, spectral, isogeometric elements and others; methods with reduced numerical dispersion; filtering spurious oscillations; fictitious domain methods with the special treatment of the boundary conditions; new implicit and explicit time-integration methods for structural dynamics, wave propagation and impact problems; adaptive methods and space and time error estimators; application of new numerical methods to engineering dynamics and wave propagation problems; and others.
In the last decades, a new concept for reducing structural response has emerged. This research paper concerns an experimental analysis of the structural response of buildings allowed to uplift when subjected to near-source earthquakes considering nonlinear soil —foundation-structure-interaction NSFSI.
Newmark proposed an empirical equation for calculating the time period of a rocking chimney, but the structural dimensions were not incorporated in the equation. Methods for seismic risk assessment of building portfolios are assuming a growing importance within earthquake engineering, due to the developing strong interest in cat modeling both from insurance and reinsurance companies and from public stakeholders interested in employing resources in risk mitigation planning e. These methods generally cover large urban- or regional- scale assessments, and include models for the assessment of seismic hazard, vulnerability — empirical observational-based or mechanical usually simplified — and losses human, functional and monetary.
In all of these steps, managing uncertainties plays a key role and deserves a special attention. Contributions covering multi-hazard scenarios with cascading events i. The proposed MS is aimed at collecting advanced contributions from researchers in all these fields, promoting stimulating discussion and comparison. In the past decades, vibrations monitoring has gained widespread use in civil and structural engineering as a useful tool not only in Structural Health Monitoring but also to calibrate numerical models for the assessment of the seismic response of buildings.
Looking for other ways to read this?
In particular, for the latter aim, experimental measures from real earthquakes represent a precious source for a better understanding of the seismic behaviour of structures even in the nonlinear phase and supporting detailed numerical calibrations. Both requisites are essential for improving the reliability of quantitative safety assessments. Such structures exhibited various damage levels, from slight to near collapse, highlighting various issues on the system identification techniques, potential of modelling strategies and evidences on amplification phenomena at different storeys.
In addition to the presentation of such an experience, researchers are invited to contribute to this Mini-Symposium, according to their perspective and presenting their results, both through theoretical papers and applications on existing buildings. Recent advances on the investigation of the response of structures interacting with soil under earthquake or other dynamic excitations have provided novel and effective design solutions for geotechnical systems, including retaining walls and foundations of structures and critical infrastructures such as bridge piers and offshore wind turbines.
Strong support on this topic has been given by relevant theoretical studies and experimental data at real or laboratory scale. In this regard, this Minisymposium encourages contributions on the dynamic analysis and design of retaining walls, surface and deep foundations or other engineering solutions including soil improvement, geotechnical isolation etc. Studies on kinematic soil-foundation interaction and the behavior of foundations in complex soil conditions are particularly welcome. It is envisioned that this Minisymposium will create an interacting forum among scientists and practitioners to exchange knowledge and new research ideas on the analysis and design of geostructures under dynamic loads.
Damages of structures due to earthquake and tsunami show a wide variety of characteristics, depending on the combinations of structures and natures of earthquake and tsunami. Structural materials include woods, concretes, reinforced concretes, steels and so on. There are another classification in structures such as civil constructions, buildings and architectures, chemical, petro-chemical and power plants, in which multi-physics phenomena such as fluid-structure interaction may occur. There are possibilities such that those structures may be attacked by a variety of earthquakes and tsunami in magnitudes and frequency spectra.
In order to quantitatively predict such complex damage phenomena and to prevent them, high-performance computing technologies with sophisticated material modeling and analysis algorithms play key roles.
- Return of Gonzo Gizmos: More Projects & Devices to Channel Your Inner Geek.
- Serenata No. 2 in G Major - Violin 1.
- IN ADDITION TO READING ONLINE, THIS TITLE IS AVAILABLE IN THESE FORMATS:.
- Clinical Cardiac MRI!
The topics of the Minisymposium are strongly multidisciplinary. The methods and strategies to retrofitting, valorization, and management of the historical center of the cities in particular existing buildings , are the core of the Mynisimposium. The decision to reuse of the historical buildings is a difficult problem and should be performed by decision makers with consideration of the natural hazards. Appropriate mitigation strategies, that considers a suitable re-use, can result in a sustainable preservation of historical assets and safety.
In seismic prone countries, historical centers have an important role in natural events. They have shown that the vulnerability of historical sites is generally higher that of the more recent neighbourhoods. In the retrofitting strategies, the requirements of historical centres are often related to social and economic changes effects of the delocalization of the population, effects of the tourism. Moreover, often historic centres or their significant part became a ghost town after natural events.
Their management reuse and development must be based on their vulnerability reduction. The role of the vulnerability of buildings on the resiliency of the cities is the fundamental critical aspect. Consequently, the research will be carried out considering the fundamental role of the resilience of the cities in risk mitigation and government. In accordance with the objective of seismic risk analysis and territorial scale until the analysis on single buildings , different kinds of direct and indirect losses can be considered. The proposed Minisymposia would like to show and compare different approaches, existing operative proposals, and cases study about the following but not limited topics:.
Despite that it has long been assumed that the consideration of the effect of the horizontal component of earthquakes suffices for seismic reliability of structures, the vertical component should be consistently considered along with the horizontal one.
This issue becomes a great concern for conventional seismic isolation system that can reduce the structural effects of the horizontal component of an earthquake, while the vertical component is transmitted directly into the structure. As such, there is considerable and increasing research interest worldwide in vertical and three-dimensional isolation systems to protect a wide range of structures and valuable facilities such as heritage assets and specialized equipment. The scope of this session is to collect experiences and proposals to expand traditional base isolation schemes toward innovative solutions with special mention to three-dimensional base isolation.
Contributions to these issues are critical to improve the current isolation technologies toward resilience. This session aims to attract academics, researchers, students, post-graduate students and professional engineers dealing with the following advanced topics:. Modern design codes recalls the importance of the consideration of the infill masonry IM walls in the design and assessment of buildings, but it is recognized that the available guidelines and knowledge is still limited.
Recent earthquakes in southern European regions showed that the damage on these non-structural elements can cause important human and economic losses. IM walls can influence the global behavior and performance of building structures, in terms of global lateral stiffness, strength, energy dissipation and ductility, but can also chance the distribution of seismic demands among the structural elements.
Recent evidences showed the importance of the in-plane and out-of-plane walls' responses and their interaction. This Mini-symposium is focused on the recent research outputs on the studies of infill masonry walls behavior, their contribution to the buildings safety and response, to the new techniques and solutions adopted in construction of IM walls and in the retrofitting of existing buildings, as well as on the design methodologies and detailing of IM walls concerning their seismic behavior. The proposed minisymposium deals with recent advances in structural design.
Thanks to the developments in engineering research, as well as the advancement of personal computers, structural design has progressed significantly. Design of structures with special requirements has become increasingly more frequent in practice, while the time from the initial research work to its application in practice has minimized. New structural assessment methods, simulation of blast loadings, design or retrofit against progressive collapse, design and analysis of structures subjected to extreme natural disasters such as hurricanes or tsunamis, damage-free design, design of buildings incorporating innovative devices are only few of the topics engineering researchers are currently working on.
This minisymposium aims to bring together researchers working on topics of structural design beyond its conventional principles. A central principle in performance-based seismic design PBSD is to guarantee that structural systems have adequate ductility and energy dissipation capacity so that the expected damage can be controlled to lie within the limits of chosen performance states. Even though the seismic performance of a structure is directly related to the global and local deformations of the structure, the energy balance formulation appears much more effective in concept, as it permits a rational assessment of the energy absorption and dissipation mechanisms that can be effectively accomplished to balance the energy imparted to the structure.
Various recent studies have demonstrated the advantages of an energy-based seismic design methodology and the important role it would play in future seismic design codes. Although, compared to forces and displacements, energy is a more difficult concept for a designer to rationalize, significant advantages of the energy-based approach are that it explicitly addresses cumulative damage and it takes in to account localized structural damage.
A significant amount of research is required to incorporate energy-based methodologies throughout current seismic design codes. For example, to assess the performance of a structure in terms of energy, engineers must have the necessary analysis tools, including models for hazard, response, damage and costs. This Mini-symposium is focused on the recent research outputs on the studies regarding.
All these studies are necessary for an explicit energy-based formulation of performance criteria for both conventional and innovative structural systems. Model reduction techniques have been extensively used to improve the computational efficiency in various structural dynamics problems since the s. Recently, they have been employed not only for conventional applications such as free vibration, transient analysis and finite element model updating, but also uncertainty quantifications, multiphysics problems, and design optimization. They can offer theoretical backgrounds of digital twin and virtual sensing in Industry 4.
The aim of this mini-symposium is to provide a forum for researchers to discuss recent advances of model reduction techniques for the computational and structural dynamics community. The proposed MS invites researchers to present their research progresses on the following and related topics:. Masonry infills are traditionally inserted in reinforced concrete or steel frame structures.
- The Rhetoric of First Lady Hillary Rodham Clinton: Crisis Management Discourse (Praeger Series in Political Communication (Hardcover));
- Log in to Wiley Online Library.
- The Devils Delusion: Atheism and its Scientific Pretensions.
- Dreamtelling (FOCI).
- Easy-to-Build Outdoor Projects: 29 Projects for Your Yard and Garden.
- Distributed Computing: Fundamentals, Simulations and Advanced Topics, Second Edition.
During seismic events infills strongly interact with primary structures, significantly modifying strength, stiffness, collapse modes and structural ductility. Explicit consideration of the main seismic event constitutes the cornerstone of current seismic code provisions. Describing long-term seismicity by a homogenous Poisson process implies that the damaged structure is restored back to its intact state immediately each time an earthquake takes place.
Well-established concepts such as fragility and risk e.
15/04/19 – 19/04/19
In other words, there is usually enough time to repair the damaged structure before it is affected by another strong earthquake. The effects of the triggered aftershock sequence are apparently missing from this context —they are often disguised in the definition of the desired performance levels. The problem is rendered challenging both by the short-term surge in seismicity in the aftermath of a strong earthquake and by the cumulative damages caused by the triggered seismic sequence. Recent earthquakes have provided evidence for the significant amount of damage caused by the triggered aftershocks.
In fact, in the past decade, a lot of research efforts have been carried out with the aim of shedding some light on the specific challenges of aftershock risk assessment. This mini-symposium aims to discuss the state of art and future challenges of aftershock risk assessment. Reinforced concrete buildings are one of the most common structural solutions adopted, over the years, for seismic areas. In particular, several problems were highlighted in the case of RC constructions provided by smooth steel reinforcing bars typical of the period before the s , since the structural performance of such construction appears strongly influenced by bond-slip phenomena; the modelling of the bond-slip behaviour have been deeply studied during the last decades providing several technical and mechanical models that may result often difficult to be applied especially in the case of complex and big constructions.
Stating these considerations, it becomes evident that the modelling of structural aspects such as bond-slip phenomena, deterioration due to durability problems and others — opportunely calibrated basing on the results of experimental tests - is fundamental for the understanding of the structural performance of RC constructions, both in the case of modern and existing ones. In the symposium, new approaches for the numerical modelling of RC constructions are presented.
Important research contributions have been developed regarding the reliability evaluation of single pieces of art, with reference to numerical models to simulate their seismic response, to special devices aimed at their protection and to synthetic classification criteria to help an easy evaluation of their vulnerability.
This session is aimed at collecting the recent developments in such research field. Special attention will be paid to the innovative proposals for the seismic safety assessment of the artifacts and to the application of existing protection criteria to real cases. True behaviours of structural systems are dynamic and nonlinear. The conventional approach to analyze these behaviours is discretization in space and analysis in time, while also controlling and localizing the nonlinearities.
In view of the everyday growing size of the structures and the more knowledge of the behaviours, the sizes and complexities of the mathematical models increase day by day. From the other side of view, the importance of the financial aspects and optimization of the qualified designs are in everyday increase, and hence the systems need to be analyzed rapidly and with adequate precisions.
The details of nonlinear time history analysis in the recent seismic code of New Zealand is an evidence in this regard, which did not exist about a decade ago. Based on these considerations, the fact that time history analysis is the most versatile tool in analysis of nonlinear dynamic behaviours, and more, that some basic questions are yet unanswered, the main objective in this mini-symposium is to promote the efforts on nonlinear dynamic analysis, especially the earthquake-related issues, towards better seismic codes.
The topics of interest include, but are not limited to: Time integration methods, Numerical stability; Elimination of higher erroneous modes; Details of nonlinear time integration; Efficient approaches for time integration; Adaptive time stepping; Rapid methods for time history analysis against several earthquakes records; Wave propagation; Pseudo-dynamic testing, Accuracy of time history analysis; Theoretical and practical errors estimations; Analysis of different nonlinear behaviours; Time history analysis in seismic codes of Japan, China, NewZealand, EUROCODE 8, etc..
I hope that, the attendees will leave the mini-symposium and the conference, with new ideas about nonlinear dynamic analysis and the regulations in the seismic codes, as well as new collaborations and wonderful memories from the surely very friendly environment of Crete. A special session on the Seismic Resilience of Museum contents will be organized under the framework of the 7 th Conference on Computational Methods in Earthquake Engineering to be held in Crete, Greece on June We invite papers that focus on the recent advances on the seismic protection of artefacts and museum exhibits.
The mini-symposium is open to a variety of topics, including but not restricted : shake table tests, seismic isolation of low mass objects, numerical methods and modelling, loss assessment, among others. The main goal is to present state-of-the-art recent developments on the seismic protection of valuable contents and to offer a multidisciplinary approach on the topic. Of special interest is the study of novel seismic hazard mitigation measures and techniques. Thus the processing of the additional information on loads as well as including statistical properties of the material allows to provide additional answers, i.
Show all. Earthquake Loading Pages Pradlwarter, H. Wind Loads Pages Bucher, C.