A numerical tool for the design of assembled structures under dynamic loads

Festjens, Hugo; Chevallier, Gaël; Dion, Jean-Luc

doi:10.1016/j.ijmecsci.2013.06.013

Cited by 52 publications

(26 citation statements)

References 21 publications

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“…Currently, prefabricated steel structures are widely used in Europe, the United States, Japan, Australia, and other developed countries as an important form of building, for example, the light steel frame buildings in the USA, the BSAIS industrialized building system in Italy, and the SEKISUI assembly housing system in Japan . However, at present, most prefabricated structural systems are applied to low‐rise structures; there are few applications for high‐rise structures because the research results and the code or specification for the seismic design of prefabricated high‐rise steel structures is insufficient …”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8][9] However, at present, most prefabricated structural systems are applied to low-rise structures; there are few applications for high-rise structures because the research results and the code or specification for the seismic design of prefabricated high-rise steel structures is insufficient. [10][11][12][13] The T30 hotel building adopts a new type of prefabricated steel structure called a modular-prefabricated high-rise steel frame structure with diagonal braces, which could be used for high-rise buildings. The column is made of a square steel tube, the beam is a truss, the diagonal FIGURE 1 T30 hotel building brace is made of C-shaped steel arranged near the truss-column joint, and the floor is a profiled steel sheet-concrete composite slab.…”

Section: Introductionmentioning

confidence: 99%

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Design and compilation of specifications for a modular‐prefabricated high‐rise steel frame structure with diagonal braces. Part I: Integral structural design

Liu

Zhou

Zhang

et al. 2017

Structural Design Tall Build

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Summary Prefabricated steel structures have certain obvious advantages, that is, rapid construction, industrial production, and environmental protection. Although prefabricated structures have been applied in a number of countries in the world, in most cases, these structures are suitable only for low‐rise buildings, and their applications in high‐rise buildings are nota\bly rare. This paper proposes a new type of prefabricated steel structure called the modular‐prefabricated high‐rise steel frame structure with diagonal braces. Based on the T30 building, which is a hotel building with 30 storeys above the ground, the mechanical properties, failure mode, failure mechanism, and elastic–plastic development laws of the structure were studied via elastic and elastic–plastic design and analyses under various load cases and combinations. The analysis of the internal force and displacement response with frequent earthquakes was performed using the response spectrum and elastic time‐history methods, and an analysis under rare earthquakes is performed via static elastic–plastic pushover analysis. This paper summarizes the elastic and elastic–plastic structural design methods and process. This study provides important references for the design of this kind of modular‐prefabricated high‐rise steel structure, and the design method has been compiled into a design specification named Technical Specifications for Prefabricated Steel Frame Structure with Diagonal Bracing Joints.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and compilation of specifications for a modular‐prefabricated high‐rise steel frame structure with diagonal braces. Part I: Integral structural design

Liu

Zhou

Zhang

et al. 2017

Structural Design Tall Build

View full text Add to dashboard Cite

show abstract

“…This technique was introduced by the authors of [36], who made two simplifying assumptions in the groundwork theory established in [35]: namely 1) negligible change in the mode shapes, and 2) extension of the "joint region" to cover the entire structure of interest. With selective excitation of a mode, [36] shows that the estimated amplitude-dependent damping and natural frequencies produced from quasi-static modal analysis agreed remarkably well with those obtained using Hilbert transform methods.…”

Section: Appendix Amentioning

confidence: 99%

“…Even then, despite the model containing only a few Iwan elements, it is still expensive to compute the transient response, and one would have to perform lengthy simulations of the nonlinear ring-down response of a structural model in order to extract these amplitude-dependent properties [34]. To address this, a quasi-static technique was recently developed in [35] that was later simplified in [36] to create a highly efficient and accurate algorithm for computing amplitudedependent frequency and damping for models containing Iwan elements. The authors of [36] then used the algorithm to update the Iwan parameters in a finite element model to match the nonlinearity seen in experimental measurements on the transient free-response of a bolted structure.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear modeling of structures with bolted joints: A comparison of two approaches based on a time-domain and frequency-domain solver

Lacayo

Pesaresi

Groß

et al. 2019

Mechanical Systems and Signal Processing

129

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Motivated by the current demands in high-performance structural analysis, and by a need to better model systems with localized nonlinearities, analysts have developed a number of different approaches for modeling and simulating the dynamics of a bolted-joint structure. However, it is still unclear which approach might be most effective for a given system or set of conditions. To better grasp their similarities and differences, this paper presents a numerical benchmark that assesses how well two diametrically differing joint modeling approaches -a time-domain wholejoint approach and a frequency-domain node-to-node approach -predict and simulate a mechanical joint. These approaches were applied to model the Brake-Reuß beam, a prismatic structure comprised of two beams with a bolted joint interface. The two approaches were validated first by updating the models to reproduce the nonlinear response for the first bending mode of an experimental Brake-Reuß beam. Afterwards, the tuned models were evaluated on their ability to predict the nonlinearity in the dynamic response for the second and third bending modes. The results show that the two joint modeling approaches perform about equally as well in simulating the Brake-Reuß beam. In addition, the exposition highlights improvements that were made in each method during the course of this work and reveal further challenges in advancing the state-of-the-art.

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“…To help address this, Festjens et al [8] proposed a model reduction technique that spatially decomposes a structure into a linear domain away from the joint and a nonlinear domain near the joint. Then the inertial term in the joint domain is neglected and the joint is assumed to behave quasi-statically.…”

Section: Introductionmentioning

confidence: 99%

Predicting Damping of a Cantilever Beam With a Bolted Joint Using Quasi-Static Modal Analysis

Jewell

Allen

Lacayo

2017

Volume 8: 29th Conference on Mechanical Vibration and Noise

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Bolted joints are common in assembled structures and are a large contributor to the damping in these assemblies. The joints can cause the structure to behave nonlinearly, and introduce uncertainty because the effective stiffness and damping at the joint are typically unknown. Consequently, improved modeling methods are desired that will address the nonlinearity of the jointed structured while also providing reasonable predictions of the effective stiffness and damping of the joint as a function of loading. A method proposed by Festjens, Chevallier and Dion addresses this by using a sort of nonlinear modal analysis based on the response of the structure to quasi-static loading. This was further developed by Allen and Lacayo and thoroughly demonstrated for structures with discrete Iwan joints. This work explores the efficacy of quasi-static modal analysis for 2D and 3D finite element models in which the geometry, contact pressure and friction in the joint are modeled in detail. The mesh density, contact laws, and other solver settings are explored to understand what is needed to obtain convergence for this type of problem. For the 2D case study, the effect of bolt preload and coefficient of friction are explored and shown to produce reasonable trends. Three dimensional models prove far more challenging and significant effort was required to obtain convergence and then to obtain results that are physically realistic; these efforts are reported as well as the lessons learned.

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A numerical tool for the design of assembled structures under dynamic loads

Cited by 52 publications

References 21 publications

Design and compilation of specifications for a modular‐prefabricated high‐rise steel frame structure with diagonal braces. Part I: Integral structural design

Design and compilation of specifications for a modular‐prefabricated high‐rise steel frame structure with diagonal braces. Part I: Integral structural design

Nonlinear modeling of structures with bolted joints: A comparison of two approaches based on a time-domain and frequency-domain solver

Predicting Damping of a Cantilever Beam With a Bolted Joint Using Quasi-Static Modal Analysis

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