Moufang Twin Buildings and RGD Systems

2008 ◽  
pp. 1-50
Keyword(s):  
Twin Buildings

Effect of the Separating Distance of Twin Buildings on the Generated Flow Structure

2010 ◽  
Vol 297-301 ◽  
pp. 924-929
Author(s):  
Inès Bhouri Baouab ◽  
Nejla Mahjoub Said ◽  
Hatem Mhiri ◽  
Georges Le Palec ◽  
Philippe Bournot
Keyword(s):  
Stokes Equations ◽  
Three Dimensional ◽  
Reynolds Stress Model ◽  
Navier Stokes ◽  
Wind Flow ◽  
Turbulent Model ◽  
Navier Stokes Equations ◽  
Twin Buildings ◽  
Volume Method ◽  
Numerical Examination

The present work consists in a numerical examination of the dispersion of pollutants discharged from a bent chimney and crossing twin similar cubic obstacles placed in the lee side of the source. The resulting flow is assumed to be steady, three-dimensional and turbulent. Its modelling is based upon the resolution of the Navier Stokes equations by means of the finite volume method together with the RSM (Reynolds Stress Model) turbulent model. This examination aims essentially at detailing the wind flow perturbations, the recirculation and turbulence generated by the presence of the twin cubic obstacles placed tandem at different spacing distances (gaps): W = 4 h, W = 2 h and W = 1 h where W is the distance separating both buildings.

The Risk of Fire in Twin Buildings of the Ouro Preto Historic Center: World Heritage

2021 ◽  
pp. 305-321
Author(s):  
Antônio Maria Claret de Gouveia ◽  
Giovana Martins Brito ◽  
Ana Elisa de Oliveira
Keyword(s):  
World Heritage ◽  
Historic Center ◽  
Twin Buildings

scholarly journals SSI AND SSSI EFFECTS IN SEISMIC ANALYSIS OF TWIN BUILDINGS: DISCRETE MODEL CONCEPT

2012 ◽  
Vol 18 (6) ◽  
pp. 890-898 ◽  
Author(s):  
Sadegh Naserkhaki ◽  
Hassan Pourmohammad
Keyword(s):  
Discrete Model ◽  
Soil Structure ◽  
Seismic Analysis ◽  
Numerical Study ◽  
Elastic Half Space ◽  
Soil Structure Interaction ◽  
Model Concept ◽  
Structure Interaction ◽  
Twin Buildings ◽  
Hard Soils

This paper presents a numerical study of soil-structure interaction (SSI) and structure-soil-structure interaction (SSSI) effects on response of twin buildings during earthquake excitations. The buildings are modeled as shear buildings and the soil is simulated by a discrete model representing a visco-elastic half-space subjected to earthquake acceleration. Equation of motion of twin buildings with different conditions, fixed based (FB), SSI and SSSI, are developed via an analytical procedure and solved numerically. Buildings responses are evaluated for aforementioned three conditions considering various soil types and compared together. One must say that soil causes change in distribution of responses throughout the buildings while ignoring soil interaction may lead to detrimental effects on buildings. Anyway, interaction between twin buildings with SSSI condition slightly mitigates soil unfavorable effects compare to one building with SSI condition. In addition, it is found that influence of soil is very significant for soft to stiff soils whereas negligible for hard soils.

On Opposition in Spherical Buildings and Twin Buildings

2000 ◽  
Vol 4 (2) ◽  
pp. 125-137 ◽  
Author(s):  
P. Abramenko
Keyword(s):  
Twin Buildings

scholarly journals On isometries of twin buildings

2020 ◽  
Author(s):  
Sebastian Bischof ◽  
Anton Chosson ◽  
Bernhard Mühlherr
Keyword(s):  
Local Structure ◽  
Technical Condition ◽  
Twin Buildings

AbstractA twin building consists of two buildings that are twinned by a codistance function. We prove that the local structure of a twin building uniquely determines the two buildings up to isomorphism. This has been known for twin buildings satisfying a technical condition (co).

scholarly journals AUTOMORPHISMS AND OPPOSITION IN TWIN BUILDINGS

2013 ◽  
Vol 94 (2) ◽  
pp. 189-201 ◽  
Author(s):  
ALICE DEVILLERS ◽  
JAMES PARKINSON ◽  
HENDRIK VAN MALDEGHEM
Keyword(s):  
Projective Plane ◽  
Finite Projective Plane ◽  
Spherical Building ◽  
Absolute Point ◽  
Locally Finite ◽  
Fixed Type ◽  
Twin Buildings

AbstractWe show that every automorphism of a thick twin building interchanging the halves of the building maps some residue to an opposite one. Furthermore, we show that no automorphism of a locally finite 2-spherical twin building of rank at least 3 maps every residue of one fixed type to an opposite (a key step in the proof is showing that every duality of a thick finite projective plane admits an absolute point). Our results also hold for all finite irreducible spherical buildings of rank at least 3, and imply that every involution of a thick irreducible finite spherical building of rank at least 3 has a fixed residue.

Tuned mass damper asymmetric coupling system for vibration control of adjacent twin buildings

2019 ◽  
Vol 23 (5) ◽  
pp. 954-968
Author(s):  
Seung-Yong Ok
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Tuned Mass Damper ◽  
Independent Control ◽  
Control Approach ◽  
Coupling System ◽  
Mass Damper ◽  
Asymmetric Coupling ◽  
Coupling Approach ◽  
Twin Buildings

It is widely known that, in the vibration control problem of two adjacent structures, an inter-building coupling approach with the connecting damper is more efficient than an independent control approach with the bracing damper. However, the inter-building coupling approach is only valid for two different structures. When the two structures are twin, the existing inter-building coupling approach does not work properly due to the response symmetry of the twin structures. To overcome such limitations, this study proposes a new control approach based on the asymmetric coupling system where the twin buildings are coupled with the connecting damper and the additional damper is installed asymmetrically to perturb the symmetry of the twin structures. Under this intentional asymmetric condition, the proposed system can fully maintain the control efficiency of the conventional inter-building coupling approach. The tuned mass damper–based asymmetric coupling system is considered as a numerical example, and the independent control system with tuned mass damper is further taken into account for comparison purpose. For the optimal design of the proposed system, a multi-objective optimization technique was introduced, and the efficiency of the proposed approach has been investigated through the numerical simulations of the 10-story twin structures. By comparing the control performances of the optimal solutions between the proposed asymmetric coupling systems and the independent control system, it was verified that the proposed asymmetric coupling system can be a new efficient system for the vibration control of adjacent twin structures.

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