Application of Maxwell damping in the dynamic analysis of masonry structures with discrete elements

2021 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Z. Cheng ◽  
José V. Lemos ◽  
E.M. Dawson
Keyword(s):  
Dynamic Analysis ◽  
Masonry Structures ◽  
Discrete Elements

Numerical methods for the dynamic analysis of masonry structures

2006 ◽  
Vol 22 (1) ◽  
pp. 107-130 ◽  
Author(s):  
Silvia Degl'Innocenti ◽  
Cristina Padovani ◽  
Giuseppe Pasquinelli
Keyword(s):  
Numerical Methods ◽  
Dynamic Analysis ◽  
Masonry Structures

DYNAMIC ANALYSIS OF THE INTERACTION BETWEEN BELLS AND MASONRY STRUCTURES

2020 ◽  
Author(s):  
David Bru ◽  
Salvador Ivorra ◽  
Michele Betti ◽  
Gianni Bartoli ◽  
F. Javier Baeza ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Masonry Structures

scholarly journals Discrete Element Modeling of the Seismic Behavior of Masonry Construction

Buildings ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 43 ◽  
Author(s):  
José Lemos
Keyword(s):  
Dynamic Analysis ◽  
Seismic Behavior ◽  
Failure Modes ◽  
Shaking Table Test ◽  
Discrete Element ◽  
Shaking Table ◽  
Stone Masonry ◽  
Discrete Elements ◽  
Element Analysis ◽  
Masonry Construction

Discrete element models are a powerful tool for the analysis of masonry, given their ability to represent the discontinuous nature of these structures, and to simulate the most common deformation and failure modes. In particular, discrete elements allow the assessment of the seismic behavior of masonry construction, using either pushover analysis or time domain dynamic analysis. The fundamental concepts of discrete elements are concisely presented, stressing the issues related to masonry modeling. Methods for generation of block models are discussed, with some examples for the case of irregular stone masonry walls. A discrete element analysis of a shaking table test performed on a traditional stone masonry house is discussed, as a demonstration of the capabilities of these models. Practical application issues are examined, namely the computational requirements for dynamic analysis.

Seismic Vulnerability Assessment of Multistory Timber Braced Frame Traditional Masonry Structures

2012 ◽  
Vol 601 ◽  
pp. 168-172 ◽  
Author(s):  
Naveed Ahmad ◽  
Qaisar Ali ◽  
Muhammad Umar
Keyword(s):  
Dynamic Analysis ◽  
Seismic Vulnerability ◽  
Seismic Analysis ◽  
Pushover Analysis ◽  
Elastic Beam ◽  
Lateral Force ◽  
Experimental Results ◽  
Constitutive Law ◽  
Masonry Structures ◽  
Braced Frame

Research carried out on the seismic investigation of timber braced frame (TBF) masonry structures of traditional construction practice is presented, essential for seismic performance evaluation of such construction type using engineering approaches. An innovative simplified equivalent frame method (EFM) based on macro modelling approach is presented for nonlinear dynamic seismic analysis of TBF masonry structures. The modelling include EFM idealization of wall using stiff elastic beam-column element assigned with moment-rotation (M-θ) nonlinear lumped plasticity hinges. Earlier, the approach i.e. the EFM idealization and M-θ constitutive law, is calibrated with the experimental results obtained through quasi-static cyclic test on full scale walls. The technique is further extended herein for seismic dynamic analysis of multistory structures. Generalization of the technique for modelling walls of various geometry and loading is performed. It included nonlinear static pushover analysis of various case study walls, by means of SAP2000 calibrated earlier with experimental results, for the derivation of lateral force-deformability behavior towards the development of generalized M-θ constitutive law for TBF masonry walls. Three representative structures, from one to three storeys, are analyzed using a suite of ten natural accelerograms and incremental dynamic analysis technique. Structure fragility and resilience functions are derived using a fully probabilistic and dynamic approach. The structures analyzed in the present study represent TBF masonry wall structures, called as Dhajji-Dewari structures, common in Northern areas of Pakistan.

scholarly journals Modelling the Dynamics of Masonry Structures with Discrete Elements

2016 ◽  
Vol 10 (1) ◽  
pp. 210-219 ◽  
Author(s):  
José V. Lemos
Keyword(s):  
Time Domain Analysis ◽  
Rigid Bodies ◽  
Stone Masonry ◽  
Numerical Representation ◽  
Masonry Structures ◽  
Discrete Elements ◽  
Time Stepping ◽  
Realistic Representation ◽  
Contact Models ◽  
Block Models

Block models have been shown to provide a realistic representation of the behavior of many types of masonry structures under static and dynamic loads. When the strength of the units is such that movements along the joints govern the behavior, it is acceptable to make the simplifying assumption that blocks act as rigid bodies. This assumption is particularly useful when dealing with seismic problems, for which the computational times for time domain analysis may be substantial. In this paper, the application of discrete element models for dynamic analysis of masonry structures is addressed. The emphasis is on the seismic behavior of block stone masonry, but the treatment is general to cover other types of masonry. First, the assumptions involved in the choice of a block representation are discussed, stressing in particular the case of rigid block models. Numerical issues are examined, including contact models, calculation of natural frequencies, time stepping algorithms, damping and boundary conditions. A review is presented of modeling examples published in the literature for various types of masonry structures. The choice of numerical representation and its main features are discussed for each case.

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