Special Sessions

SS1: Learning from excellent performance

A number of old concrete structures exhibit excellent performance. The reason for excellent performance has hardly been studied. Hence, the reasons for excellent performance remains largely unknown. Possible aspects that have to considered could have contributed to excellent performance are mix design, execution, curing and finishing of concrete surfaces, maintenance and structural design. But is there a key aspect that dominates performance? read more


 SS2: Self- healing for longevity of ageing concrete infrastructure

Ageing is an inherent feature of all natural and man-made materials. As such ageing is also an inherent feature of all are infrastructure works. Concrete as a material also ages. At the same time concrete is known for its inherent self-healing potential. Recently self-healing has got a lot of attention. The performance of concrete structures is determined by these two competing inherent features of ageing and self-healing.read more


 SS3: Engineering Adaptation to Climate Change

Infrastructure systems represent a complex network of interdependent systems, which are subject to numerous threats posed by natural and man-made hazards, cascading risks, effects of ageing and ever increasing demands due to population growth. Infrastructure also faces new challenges caused by a changing climate. In order to ensure uninterrupted services and reliable performance of infrastructure in the future its resilience needs to be improved which includes the infrastructure adaptation to climate change.read more


SS4: Long term Performance optimization

Life-cycle civil engineering is not only focused on optimizing the life-cycle cost of civil assets. To make cost-efficient decisions it is important to know what level of performance should be achieved. This starts out with the Decision makers who should have insight in the long term Performance requirements for the civil assets. These high level requirements should be translated into achievable performance requirements at the level of specific constructions.read more


SS5: Risk based maintenance from life cycle perspective

The progressive approach of (semi-) quantitative Risk Based Maintenance (RBM) techniques in civil engineering is a challenge for those organizations that rely on outsourcing maintenance activities. Though the RBM method itself is not new, knowledge about it and implementation of related roles and responsibilities within the outsourcing organization is as important as the RBM process that is outsourced itself. Not being able to fulfill these issues will induce a risk to the processes and organization not being able to obtain sufficient control over the civil asset.read more


SS6: Dynamic Contracting: Optimal performance over the life cycle due to better cooperation between contact partners

Transport infrastructure networks (such as roads, railways, and waterways) are complex systems in a changing (not to say transforming) society. Important changes that influence the networks concern demands, requirements, regulations, financial possibilities, technological developments, etc. The traditional way in which new projects, renewals/ upgrades and maintenance are contracted, cannot cope with these changes in a sufficient way. Moreover, there are also problems with the rigidity of new contract forms, such as DBFM, illustrated by relatively high prices for (minor) changes. read more


SS7: Standardization of performance indicators and goals for the life-cycle management of highway bridges

Life-cycle analyses are used in condition assessment of new and existing bridges, as well as for evaluation of maintenance strategies. Management systems, capturing different degradation processes, are very often used in relation to such life-cycle analyses methods in order to describe the actual and future condition.
During the implementation of asset management strategies, maintenance actions are required to keep assets at desired performance levels.read more


SS8: Focussing on end-of-lifetime scenarios: Demolition and deconstruction as part of an integrated view on lifetime engineering

Focussing on end-of-lifetime scenarios: Demolition and deconstruction as part of an integrated view on lifetime engineering
Generally, the lifetime of buildings is divided in three phases:  Creating a new building, using the building and at the end of lifetime deconstructing the building. Especially the deconstruction phase produces a great impact on natural resources mostly due to a lack of general knowledge and special demolishing engineering.read more


SS9: Cost reduction and societal benefits over the life cycle due to monitoring of existing structures and innovative repair techniques

After decades of expanding the infrastructural network, currently increasing budgets are spend on maintenance. While for designing new structures, using a life-cycle costing (LCC) approach becomes more common, for maintenance of existing structures this is usually only done with major renovations. This is partly due to unfamiliarity of maintenance managers with such an approach and partly because the knowledge to do so is not widespread.   read more


SS10: Managing infrastructure assets: From performance data to optimal strategies

A main task of infrastructure management is the development and application of optimal intervention strategies. An intervention strategy is optimal if the total costs incurred by all stakeholders is minimized for a specified time within the life-cycle of an asset. Whether the optimal intervention strategy can be determined strongly depends on the appropriate data to evaluate the current and predict the future performance of infrastructure assets.read more


 SS11: Learning cycles in life-cycle asset management

Typically, civil structures possess a long life span that sharply contrasts with the dynamics of their social, technological and environmental context. During the expected lifetime of engineering assets user requirements can shift, new technologies can emerge, and environmental condition can change. As a consequence, asset managers need to be adaptive in their life-cycle management approach. They need to be able to learn while managing their assets.read more




SS12: Performance of concrete during life-cycle

Concrete, as a major building material, has been extensively used in the civil engineering. Although substantial understandings of concrete performance under static loadings has been achieved, the influence of loading rate, the action of stirrups and the corrosion of the steel bar on the concrete performance has not been well understood.  Moreover, for reinforced concrete structures, some other actions such as the long standing loadings, the confinement of stirrups and the rust expansion crack should be taken into account. read more


SS13: System capacity and robustness for new and existing structures

 

In this special session, we will focus on aspects of system capacity and robustness for both new and existing structures. The main areas of this topic are the definition and comparison of robustness interpretations and the comparison and assessment of standard models in terms of complexity, including the development of boundary conditions for new and existing structures and systems. Special attention will be given to economic optimization and individual risk.read more


SS14: Marine Structural Longevity

Marine structures pose unique challenges for lifecycle performance prediction and maintenance optimization. Highly mobile in a corrosive operating environment, there are significant uncertainties around both the magnitude of the loading process and the condition of the structure. Owing to their large size, highly redundant structural configuration, and infrequent removal from service, monitoring and inspection also poses unique challenges for such structures. read more


SS15: Optimizing decision making of rail asset management

Rail infrastructure is living an ever tougher life. Through their crowded timetables and on behalf of their many customers, transport service demands a lot from the responsible asset management party. Expectations keep rising with respect to growth in performance and decrease of costs. This requires continuous innovation in (cross organizational) decision making. read more