A.A. Roubos
27 records found
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Since most of the existing port infrastructure needs to be upgraded or replaced in the coming decades, the Port of Rotterdam Authority invests in sustainable and future proof design solutions. Together with their partners, they aim to reduce the port’s CO₂ emissions by 50% in 203
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PIANC WG211 was tasked with updating the design approach of marine fender systems. While the load-andresistance- factor design approach is widely adopted in the design of marine structures, the PIANC WG33 design guideline utilizes a global safety factor, referred to as the factor
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With the preparation and development of the updated fender guidelines by PIANC WG211, it is evident that clear and uniform design recommendations for vessel berthing velocities need to be derived, since this is one of the most critical parameters in fender-system design. This pap
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Over the past decades, vessel dimensions have grown considerably. Hence, marine structures need to absorb the larger berthing energy associated with these modern vessels. To absorb this berthing energy, quay walls and jetties are typically equipped with fender systems. In contras
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PIANC WG211 was tasked with updating the guidelines for design of marine fender systems. One of the changes to the new guideline is the change in approach to the design. Whilst the load and resistance factor design approach is widely adopted in the design of marine structures, th
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The PIANC Guidelines for the Design of Fender Systems: 2002 (WG33) is to be replaced by an updated document, PIANC Fender Guidelines 2024 (WG211). With the preparation and development of PIANC WG211, the issues that should be considered when selecting a fender system deserve ...
A glimpse into the future of site supervision
Data collection during pile installation at the Amaliahaven construction site
The Amaliahaven project in the Port of Rotterdam involves the construction of quay walls and a back crane track. Given the enormous quantities of foundation piles and anchors included in the design, it was decided to collect and store the installation data in a uniform and struct
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In this study, driving records of 18 open-ended steel tubular piles installed in dense sandy soil conditions at five sites in the Netherlands were utilized to evaluate models that are currently used in practice for predicting the static soil resistance during driving (SRD), as we
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Propellers of ships generate high velocities adjacent to quay walls, jetties and locks. Generally, a bottom protection is installed in order to prevent instability due to scour. Although design guidance exist, propeller-induced loads are far from fully understood and have predomi
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PIANC Working Group 211
Reliability Based Design of Marine Fenders-No More Abnormal Berthing Factor
Design of fender systems consists of two distinct steps: selection of an appropriate fender based on berthing energy demands from the berthing vessel and design of the supporting structure based on the reaction force imposed by the fender on the structure. Both steps include load
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With the preparation and development of PIANC WG 211, it is evident that clear design recommendations for vessel berthing velocities need to be derived, since this is one of the most critical parameters in fender-system design. This paper discusses recommendations on how to deter
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While reliability methods have already been widely adopted in civil engineering, the efficiency and robustness of finite element-based reliability assessments of quay walls are still fairly low. In this paper, the reliability indices of structural and geotechnical failure modes o
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The assessment of service-proven quay walls subject to corrosion-induced degradation is inherently a time-dependent reliability problem. Two major challenges are the modelling of corrosion and taking into account the decrease of epistemic uncertainty throughout the quay wall's se
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This paper present several cases in the Port of Rotterdam where both in the design and construction phase several different did not marched as expected. These cases are interesting for both the design as well the construction phase of a project. People will make mistakes however
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In 2017 the Dutch national standardization institute (NEN) released a new version of the National Annex to NEN-EN 1997-1 Eurocode 7, including revised reduced pile base factors. This has a significant impact on the dimensions of pile foundations. Consequently, in situ load tests
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General frameworks for reliability differentiation have evolved over time and are mainly developed for buildings. However, recommendations for the safety of existing quay walls are lacking. In this study, target reliability indices for assessing existing quay walls were derived b
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Structures, such as quay walls, have to meet a particular level of safety. Consequently, in the Eurocode standards, three reliability classes are distinguished, each corresponding to a target reliability index and set of partial factors. In this study, more insight is acquired in
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In the coming years, thousands of quay walls will approach the end of their intended fifty-year design lifetime and become part of lifetime extension programmes throughout the world. It is presently unclear how reliable these structures are and whether they are still capable of b
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General frameworks for reliability differentiation have evolved over time and are mainly developed for new buildings. However, recommendations for existing quay walls are lacking. In this study target reliability indices for assessing existing quay walls were derived by economic
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Structural codes rely on generalised target reliability indices, which are mainly derived for buildings. It is unclear, however, whether these indices are applicable to the specific risk-profile of quay walls, jetties, and flexible dolphins. In this study, target reliability indi
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