document

A rotating smeared crack approach in Sequentially Linear Analysis using the Elastic-brittle fraction model

Bresser, D. (author), Rots, J.G. (author), Hendriks, M.A.N. (author), Pari, M. (author)

Sequentially Linear Analysis (SLA), an event-by-event solution strategy in which a sequence of scaled linear analyses with decreasing secant stiffness is performed, representing local damage increments; is a robust alternative to nonlinear finite element analysis of quasi-brittle structures. Since it is based on a fixed smeared crack...

journal article 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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Simulation of Brittle Collapse Mechanisms in Historical Masonry Using Sequentially Linear Analysis (SLA)

Pari, M. (author), Rots, J.G. (author)

Sequentially Linear Analysis (SLA) is known for robust and reliable finite element simulations of masonry constructions, often considered challenging because of the brittle behaviour of the masonry material. Herein a sequence of scaled linear analyses is performed with decreasing secant stiffness of one integration point per analysis,...

book chapter 2023

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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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A multi-surface interface model for sequentially linear methods to analyse masonry structures

Pari, M. (author), van de Graaf, Anne (author), Hendriks, M.A.N. (author), Rots, J.G. (author)

In the finite element modelling of masonry structures, the micro-modelling technique of differentiating the continuum into a linear elastic bulk, and interfaces representing non-linear joints is common. However, this approach of simulating cracking-crushing-shearing failure possibilities in interfaces, typical of damage in masonry, also poses...

journal article 2021

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Mechanical modelling of the axial behaviour of traditional masonry wall metal tie connections in cavity walls

Arslan, O. (author), Messali, F. (author), Smyrou, E. (author), Bal, İ.E. (author), Rots, J.G. (author)

The seismic assessment of unreinforced masonry (URM) buildings with cavity walls is a relevant issue in many countries, such as in Central and Northern Europe, Australia, New Zealand, China and several other countries. A cavity wall consists of two separate parallel masonry walls (called leaves) connected by metal ties: an inner loadbearing wall...

journal article 2021

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Experimental and numerical study of historic masonry with bed joint reinforced repointing

Drougkas, A. (author), Licciardello, L. (author), Rots, J.G. (author), Esposito, R. (author)

Induced seismicity due to gas extraction in the province of Groningen in the Netherlands has a noticeable impact on building structures. Historic masonry structures in the area, which are non-engineered and lacking empirical design features often present in traditionally seismic regions, are especially vulnerable to dynamic loading. Compounding...

conference paper 2020

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Non-proportional loading in sequentially linear solution procedures for quasi-brittle fracture: A comparison and perspective on the mechanism of stress redistribution

Pari, M. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)

Sequentially linear solution procedures provide a robust alternative to their traditional incremental-iterative counterparts for finite element simulation of quasi-brittle materials. Sequentially linear analysis (SLA), one such non-incremental (total) approach, has been extended to non-proportional loading situations in the past few years....

review 2020

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Crack initiation and propagation in unreinforced masonry specimens subjected to repeated in-plane loading during light damage

Korswagen, Paul A. (author), Longo, M. (author), Meulman, E. (author), Rots, J.G. (author)

In recent years, gas extraction in the northern part of the Netherlands has been causing low-magnitude, induced, shallow earthquakes. Besides safety, the prediction and evaluation of ‘light’ damage due to these induced ground motions is important, as it is related to economic and serviceability losses, and societal unrest. An experimental and...

journal article 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

document

Non-proportional loading in sequentially linear analysis for 3D stress states

Pari, M. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)

Sequentially linear analysis (SLA), a non-incremental-iterative approach towards finite element simulation of quasi-brittle materials, is based on sequentially identifying a critical integration point in the model, to reduce its strength and stiffness, and the associated critical load multiplier (λ _crit ), to scale the linear...

journal article 2019

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Incremental sequentially linear analysis to control failure for quasi-brittle materials and structures including non-proportional loading

Yu, C. (author), Hoogenboom, P.C.J. (author), Rots, J.G. (author)

Quasi brittle materials, such as un-reinforced masonry or concrete are difficult to analyse because often the traditional Newton–Raphson (N-R) procedure fails to converge. Many solutions have been proposed such as Sequentially Linear Analysis (SLA), but these may fail in case of non-proportional loading with a large prestress. In this paper a...

journal article 2018

document

Form-finding of shell structures generated from physical models

Li, Q. (author), Su, Y. (author), Wu, Y. (author), Borgart, A. (author), Rots, J.G. (author)

Vector form intrinsic finite element is a recently developed and promising numerical method for the analysis of complicated structural behavior. Taking the cable-link element as example, the framework of the vector form intrinsic finite element is explained first. Based on this, a constant strain triangle element is introduced, and relevant...

journal article 2017

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Algorithm for Non-proportional Loading in Sequentially Linear Analysis

Yu, C. (author), Hoogenboom, P.C.J. (author), Rots, J.G. (author)

Sequentially linear analysis (SLA) is an alternative to the Newton-Raphson method for analyzing the nonlinear behavior of reinforced concrete and masonry structures. In this paper SLA is extended to load cases that are applied one after the other, for example first dead load and then wind load. It is shown that every nonlinear analysis step can...

conference paper 2016

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3D numerical analysis of tunnelling induced damage: The influence of the alignment of a masonry building with the tunnel axis

Kappen, J.M.J. (author), Giardina, G. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)

The development of infrastructure in major cities often involves tunnelling, which can cause damage to existing structures. Therefore, these projects require a careful prediction of the risk of settlement induced damage. The simplified approach of current methods cannot account for three-dimensional structural aspects of buildings, which can...

conference paper 2013

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Modeling the Structural Response of Reinforced Glass Beams using an SLA Scheme

Louter, P.C. (author), Graaf, van de Anne (author), Rots, J.G. (author)

This paper investigates whether a novel computational sequentially linear analysis (SLA) technique, which is especially developed for modeling brittle material response, is applicable for modeling the structural response of metal reinforced glass beams. To do so, computational SLA results are compared with experimental results of four-point...

conference paper 2010

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Finite element analyses help develop a diagnostic aid for masonry

De Vent, I.A.E. (author), Rots, J.G. (author), Hobbelman, G.J. (author)

conference paper 2009

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Sequentially linear analysis of masonry structures under nonproportional loading

Van de Graaf, A.V. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)

conference paper 2009

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A plane stress softening plasticity model for orthotropic materials

Lourenco, P.B. (author), De Borst, R. (author), Rots, J.G. (author)

journal article 1997

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Two approaches for the analysis of masonry structures: Micro and macro-modeling

Laurenco, P.B. (author), Rots, J.G. (author), Blaauwendraad, J. (author)

Two models for the micro- and macro-analysis of masonry structures are presented. For the micromodeling of masonry, an interface failure criterion that includes a straight tension cut-off, the Coulomb friction law and an elliptical cap is proposed. The inelastic behavior includes tensile strength softening, cohesion softening, compressive...

journal article 1995