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System behaviour in prestressed concrete T-beam bridges

Ensink, S.W.H. (author)

About 70 prestressed concrete T-beam bridges, constructed in the Netherlands between 1953–1977, are still in use today with many located in the main highway network. This type of bridge consists of prefabricated and prestressed T-shaped beams, with an integrated deck slab, cross-beams and transverse prestressing. Even if these bridges are well...

doctoral thesis 2024

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Finite Element Modeling of Shear Failure in Prestressed Girders with a Continuous Cast-In-Situ Deck Slab

Tai, Ricky K. (author), Slobbe, Arthur T. (author), Roosen, M.A. (author)

For structures whose structural safety cannot be demonstrated using the applicable code regulations, a nonlinear finite element analysis (NLFEA) can be used to investigate the structural behavior and maximum load capacity. The Dutch Ministry of Infrastructure and Water Management uses a dedicated guideline for NLFEA in such an assessment....

conference paper 2023

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Influences of Element Types on Nonlinear Finite Element Analysis of a Concrete Column Under Near-Field Blast Loading

Xu, Jie (author), Hendriks, M.A.N. (author), Rots, J.G. (author), Tsouvalas, A. (author)

Due to the accompanying severe consequences of explosions, the blast puts a great threat to public security. Nonlinear finite element analysis is a possible method for civil engineers to check the integrity of the structures under blast loading without underestimating the limit of the structures. However, different choices of element types...

conference paper 2023

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Structural performance of geopolymer concrete: Shear and flexural behavior of a prestressed girder with cast in-situ topping under short-term loading

Paredes Pineda, Jose (author)

Upscaling of two geopolymer concrete mixtures in an individual prestressed girder in self-compacting geopolymer concrete (SCGC) with a topping layer cast in-situ by a ready-mix geopolymer concrete provider. The objective is to study the different material properties of the mixtures, determine their impact in the structural performance and define...

master thesis 2022

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A comparison study of numerical modeling approaches for simulating the in-plane seismic response of masonry walls: Comparing unreinforced masonry walls with masonry walls retrofitted with the bed-joint reinforcement technique

Lee, Ka Ho (author)

The extraction of natural gas in the northern part of the Netherlands, from the region of Groningen, has been causing human-induced seismic activities for the past several decades. This is a problem since the existing building stock in this region, which consists of mainly unreinforced masonry buildings and historical structures, are not...

master thesis 2022

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Analytical formulations and comparison of collapse models for risk analysis of axisymmetrically imperfect ring-stiffened cylinders under hydrostatic pressure

Reijmers, J.J. (author), Kaminski, M.L. (author), Stapersma, D. (author)

Risk-based design of marine pressure hulls require computationally efficient and precise models predicting collapse pressures of ring stiffened cylindrical shells as a function of realistic geometrical imperfections. However, the empirical interframe collapse models commonly implemented in design codes do not explicitly depend on...

journal article 2022

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Quantification of the resistance modeling uncertainty of 19 alternative 2D nonlinear finite element approaches benchmarked against 101 experiments on reinforced concrete beams

de Putter, Arjen (author), Hendriks, M.A.N. (author), Rots, J.G. (author), Yang, Y. (author), Engen, Morten (author), van den Bos, Ab A. (author)

Nineteen 2D nonlinear finite element analysis (NLFEA) solution strategies were benchmarked against a wide variety of 101 experiments on reinforced concrete beams failing in bending, flexural shear, or shear compression. The relatively high number of solution strategies was motivated by the conviction that choices for the constitutive models,...

journal article 2022

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Optimization-based strut-and-tie model generation for reinforced concrete structures under multiple load conditions

Xia, Yi (author), Langelaar, Matthijs (author), Hendriks, M.A.N. (author)

Strut-and-Tie modelling (STM) has been widely applied to design D-regions of reinforced concrete structures. For economic and environmental reasons there is a need for optimized Strut-and-Tie models. How to optimize Strut-and-Tie models considering multiple load combinations has not been investigated extensively in the literature. In order to...

journal article 2022

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Validation of a Newly Proposed Global Factor Method Applied in the Assessment of Reinforced Concrete Structures Modelled by NLFEA: Verifying the new Global Factor Method as a safety format in assessing the structural capacity of reinforced concrete structures with non-linear finite element analysis in the case of clustered failure modes

Tavera Diaz, Daniela (author)

Nowadays, one of the main requirements from civil engineering structures is the level of reliability and safety that they must provide to the users. In structural analysis, the exponential application of numerical methods, as the nonlinear finite element analysis (NLFEA), is due to the increasing growth of computational power. These powerful...

master thesis 2021

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Towards a systematic design approach of D-regions in reinforced concrete: Optimization-based generation of Strut-and-Tie models

Xia, Y. (author)

Reinforced Concrete (RC) structures are widely used in our society for more than a century. In order to design safe and economical RC structures, various methods have been proposed by engineers and researchers. Remarkably, it still is a challenging task for engineers to design D-regions of RC structures, regions with nonlinear strain...

doctoral thesis 2021

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Impact forces on bridge piers in the event of ship collisions

Meijer, Berend (author)

The aim of this thesis is to propose a simple technique to estimate the maximum impact forces acting on bridge piers in the event of ship collisions. This technique is determined for Dutch commercial inland waterway ships (CEMT classes) and set up to be applied by bridge engineers to determine the required bridge pier strength. Many collision...

master thesis 2020

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Adjusting design models for pile caps and wall girders by using non-linear Finite Element Analysis

Bourgonje, Daan (author)

The strut-and-tie method is a reliable tool for designing the reinforcement in discontinuity regions in reinforced concrete structures. It provides safe designs, but it is on the other hand also acknowledged to provide conservative designs. As the strut-and-tie model is widely used in the design of structural elements as wall girders and pile...

master thesis 2020

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A comparison between the SLaMA method and NLFEA for 2D and 3D analyses of masonry structure

Ennali, N. (author)

Each year, the province of Groningen experiences many induced earthquakes due gas extraction, which has been ongoing since 1963. The earthquakes cause damage to the buildings situated in the Groningen area, and they constitute a potential danger for the safety of the residents. These buildings are typically unreinforced masonry structures which...

master thesis 2020

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Automated optimization-based generation and quantitative evaluation of Strut-and-Tie models

Xia, Y. (author), Langelaar, Matthijs (author), Hendriks, M.A.N. (author)

Strut-and-Tie modelling (STM) is a well-known approach to design D-regions in reinforced concrete structures. Because the STM method is based on lower-bound analysis, finding a suitable truss-analogy model is the most important aspect to guarantee good structural and economic performance of a resulting design. Continuum topology optimization ...

journal article 2020

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On the aeroelasticity of an extreme scale wind turbine: Using an FSI framework in NLR's in-house code ENSOLV

Rietema, Roald (author)

Recent decades, an ongoing trend has emerged in the upscaling of wind turbines in order to compete with traditional energy resources. For conventional wind turbines, aside from improving safety, the driving factors for new designs have always been increased efficiency and performance. This has led to novel wind turbine designs comprising thin...

master thesis 2019

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Evaluating strut-and-tie models for concrete elements by nonlinear finite element analysis

Sugianto, Andrew (author)

The strut-and-tie method (STM) has been acknowledged as one of the most reliable tools for designing discontinuity regions in structural concrete. It is capable of producing safe designs consistently since it was developed as an extension of the lower-bound theorem of plasticity theory. However, to aptly address a physical problem of a concrete...

master thesis 2019

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Explorative nonlinear pushover analyses for historical unreinforced masonry churches: A case study in Zandeweer, Groningen

Karim, Madina (author)

In the past decades, gas productions in the province of Groningen in The Netherlands have caused a significant amount of shallow human-induced earthquakes. Its building stock has shown to be highly vulnerable to these unexpected events. Among various building typologies, damage has been reported for approximately 12.9% of the churches in...

master thesis 2019

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Two solution strategies to improve the computational performance of Sequentially Linear Analysis for quasi-brittle structures

Pari, M. (author), Swart, W. (author), van Gijzen, M.B. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)

Sequentially linear analysis (SLA), an event-by-event procedure for finite element (FE) simulation of quasi-brittle materials, is based on sequentially identifying a critical integration point in the FE model, to reduce its strength and stiffness, and the corresponding critical load multiplier (λ _crit), to scale the linear analysis...

journal article 2019

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Compliant Fluidic Control Structures: Concept and synthesis approach

Kumar, P. (author), Fanzio, P. (author), Sasso, L. (author), Langelaar, Matthijs (author)

The concept and synthesis approach for planar Compliant Fluidic Control Structures (CFCSs), monolithic flexible continua with embedded functional pores, is presented in this manuscript. Such structures are envisioned to find application in biomedicine as tunable microfluidic devices for drug/nutrient delivery. The functional pores enlarge and...

journal article 2019

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Validation of Nonlinear Finite Element Analysis on Reinforced Concrete Slab under Concentrated Out-of-plane Load Combined with Uniaxial In-plane Load Based on Case Study

Zhou, Yanxin (author)

Finite element analysis is becoming a popular tool for engineers recently. Nonlinear finite element analysis is more advanced due to that it can deal with the nonlinearity of structures, which leads to more accurate approximation of structural behaviour. In Model Code 2010, nonlinear finite element analysis, which belongs to the higher level of...

master thesis 2018