Cement, issue 2025/1 contains a variety of interesting articles, without a specific theme. Among others, articles on vibration-absorbing foamed concrete, dapped-end beams, damage to foundation piles, connections in precast walls, wide slab floors, and groundwater loads.
Sustainable Strengthening with Foamed Concrete
Various studies on the possibilities of earthquake-resistant construction with foamed concrete
Author(s):
Ir. Jacques Linssen, Editorial Team Cement / Aeneas Media
Foamed concrete is widely used in the Netherlands as a filling material or ground cover. Structural applications are also possible, for example, in foundations for housing construction. Due to recent developments, a higher-quality variant is now available, including the addition of plastic fibers. One of the possible applications is the damping of seismic or other vibrations.
Dapped-end Beams 20 Years Later
Detailing of suspension reinforcement determines failure behavior and resistance
Author(s):
Dr. Ir. Drs. René Braam, Adviesbureau Hageman
Between 2006 and 2010, Cement extensively covered the calculation of dapped-end beams. It started in 2006 with an article by Prof. Kleinman, in which he warned against inadequately detailed reinforcement at the ends of beams. Now, almost 20 years later, we see that the relevant detailing is regularly applied again in practice. A good reason to pay attention to it once more.
Dapped-end Beam According to EC2
Calculation example of dapped-end beams based on based on strut-and-tie modelling
Author(s):
Dr. Ir. Drs. René Braam, Adviesbureau Hageman
The article series in Cement about calculating dapped-end beams, which started in 2006, concluded in Cement 2010/3 with a calculation example based on VBC 1995. Because this calculation example remains of great value, it has now been adapted to the Eurocode, using strut-and-tie modelling.
Preventing Damage to In-situ Formed Foundation Piles
CROW-CUR Guideline 3 Explained
Author(s):
Ing. Martin van der Vliet, CROW; Gilliam de Nijs, BMNed
Designing and constructing in-situ formed foundation piles is a complex process with numerous risk factors. Damage often only becomes visible during the execution phase. To minimize the risk of damage, CROW has issued a guideline: CROW-CUR Richtlijn 3. This describes the various steps necessary for a well-performing pile foundation and provides the responsible parties with tools to take the correct control measures at each phase.
Mortar Connections for Precast Concrete Wall Structures (1)
Research into the shear behavior of unreinforced profiled mortar joints
Author(s):
Dr. Ir. Dick van Keulen, Ingenieursstudio DCK
Vertical joints between precast concrete walls are usually filled with joint mortar. This mortar serves as architectural filling and has no structural function. However, shrinkage-free cementitious joint mortars possess high-quality structural properties. These can be utilized by profiling the interface between concrete and mortar. This creates a shear connection for the transfer of shear forces between wall elements. In collaboration with the precast concrete industry, several profiled interfaces for vertical mortar joints have been developed. As part of a PhD study at TU Delft, the shear behavior has been investigated.
Criticism from Common Sense
Questions about new calculation rules for wide slab floors
Author(s):
Em. Prof. Ir. Rob Nijsse
In Cement 2024/4, we were introduced to the 'New Calculation Rules for Wide Slab Floors'. Rob Nijsse feels compelled to raise some questions about them.
Sustainable by Designing Slender Concrete Structures
Review of symposium by Cement, Tektoniek, and Cement&BetonCentrum
Author(s):
Cindy Vissering, Cement&BetonCentrum, Editorial Team Cement
Last year, Cement, Tektoniek, and Cement&BetonCentrum organized a symposium about designing slender concrete structures, focusing on their impact on sustainability. The presentations are now fully available as videos. This article provides a brief review of the symposium and an introduction to the topics addressed by the speakers.
Concrete from Your Own Garden
Concrete in Focus - Paviljoen Pinteum Blijdenstein, Hilversum
Author(s):
Ir. Kirsten Hannema
Amidst the pine trees of Pinetum Blijdenstein in Hilversum stands a concrete pavilion that appears to have grown from the yellow sandy soil. The walls have a rough texture, resembling tree bark, while the floor and roof are smoothly polished and reflect the green surroundings. The design by architect Enzo Valerio was an experiment; the concrete mix was specially developed for this occasion, using sand and stones from the garden. The architect built the pavilion himself.
Prima Donnas High on the Ladder
Column by Diederik Veenendaal – Structural Engineer of the Year (4)
Learning from historical structures makes you a better structural engineer. Old buildings hold valuable insights into the inseparable interplay between form and forces. I advocate bringing ancient wisdom to the forefront, thereby working together towards more sustainable, elegant structures.
The Young Structural Engineer – Job ter Kuile (Witteveen+Bos)
In this column, we get to know the young structural engineer Job ter Kuile. He shares his experience with his first project, the Oosterweel connection (Oosterweelverbinding) in Antwerp, and gives his perspective on the engineering profession.
Groundwater Loads Safety Reconsidered
Norm Awareness Section (#8)
Author(s):
Ir. Friso Janssen, GOLDBECK Netherlands
The national annex of Eurocode 0 includes methods for determining groundwater level loads. However, there is little clarity about the backgrounds of these methods and the values to be applied. Moreover, there are doubts about the accuracy of the results.
Read in Structural Concrete: Vol. 25/6 (December 2024)
Structural Concrete Vol. 25/6 (December 2024) contains a variety of papers. A selection of the most interesting ones for Cement readers is summarized in this article.
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