Vibration characteristics of tall buildings braced by shear walls and thin-walled open-section structures

2008 ◽  
Vol 17 (1) ◽  
pp. 203-216 ◽  
Author(s):  
Sid Ahmed Meftah ◽  
Abdelouahed Tounsi
Keyword(s):  
Tall Buildings ◽  
Shear Walls ◽  
Vibration Characteristics ◽  
Open Section ◽  
Thin Walled

The effect of the warping deformation on the structural behaviour of thin-walled open section shear walls

2014 ◽  
Vol 84 ◽  
pp. 335-343 ◽  
Author(s):  
Alberto Carpinteri ◽  
Giuseppe Lacidogna ◽  
Bartolomeo Montrucchio ◽  
Sandro Cammarano
Keyword(s):  
Shear Walls ◽  
Structural Behaviour ◽  
Open Section ◽  
Thin Walled

scholarly journals An analytical formulation to evaluate natural frequencies and mode shapes of high-rise buildings

2021 ◽  
Vol 8 (1) ◽  
pp. 307-318
Author(s):  
Giuseppe Nitti ◽  
Giuseppe Lacidogna ◽  
Alberto Carpinteri
Keyword(s):  
Degrees Of Freedom ◽  
Natural Frequencies ◽  
Shear Walls ◽  
Vertical Axis ◽  
Mode Shapes ◽  
Analytical Formulation ◽  
High Rise ◽  
Open Section ◽  
Stiffness Matrices ◽  
Thin Walled

Abstract In this paper, an original analytical formulation to evaluate the natural frequencies and mode shapes of high-rise buildings is proposed. The methodology is intended to be used by engineers in the preliminary design phases as it allows the evaluation of the dynamic response of high-rise buildings consisting of thin-walled closed- or open-section shear walls, frames, framed tubes, and dia-grid systems. If thin-walled open-section shear walls are present, the stiffness matrix of the element is evaluated considering Vlasov’s theory. Using the procedure called General Algorithm, which allows to assemble the stiffness matrices of the individual vertical bracing elements, it is possible to model the structure as a single equivalent cantilever beam. Furthermore, the degrees of freedom of the structural system are reduced to only three per floor: two translations in the x and y directions and a rigid rotation of the floor around the vertical axis of the building. This results in a drastic reduction in calculation times compared to those necessary to carry out the same analysis using commercial software that implements Finite Element models. The potential of the proposed method is confirmed by a numerical example, which demonstrates the benefits of this procedure.

scholarly journals Diagrid systems coupled with closed- and open-section shear walls: Optimization of geometrical characteristics in tall buildings

2020 ◽  
Vol 44 ◽  
pp. 402-409 ◽  
Author(s):  
Giuseppe Lacidogna ◽  
Giuseppe Nitti ◽  
Domenico Scaramozzino ◽  
Alberto Carpinteri
Keyword(s):  
Tall Buildings ◽  
Shear Walls ◽  
Geometrical Characteristics ◽  
Open Section

Stiffened Trapezoidally-Corrugated Plates in Open-Section Shear Walls

2021 ◽  
Author(s):  
Sayed Behzad Talaeitaba ◽  
Farshid Khamseh ◽  
Mohammad Ebrahim Torki
Keyword(s):  
Shear Walls ◽  
Open Section ◽  
Corrugated Plates

Pretwisted Curved Beams of Thin-Walled Open Section

1972 ◽  
Vol 39 (3) ◽  
pp. 779-785 ◽  
Author(s):  
A. I. Soler
Keyword(s):  
Numerical Technique ◽  
Equations Of Motion ◽  
Highway Bridges ◽  
Major Effect ◽  
Curved Beams ◽  
Open Section ◽  
Straight Beam ◽  
Thin Walled ◽  
Bending Modes ◽  
Axes Of Symmetry

Equations of motion are derived for coupled extension, flexure, and torsion of pretwisted curved bars of thin-walled, open section. The derivation is based on energy principles and includes inertia terms. The major effect of initial pretwist is to allow coupling of all possible beam deformation modes; however, if the bar is straight and has two axes of symmetry, pretwist causes coupling only between the two bending modes, and between extension and torsion. The governing equations are presented in first-order form, and a numerical technique is suggested for the case of space varying pretwist. It is suggested that these equations may form the basis for a simplified study of the effect of superelevation on the static and dynamic response of curved highway bridges. Finally, a simple straight beam with uniform pretwist is studied to compare effects of pretwist and restrained torsion in a thin-walled beam of open section.

Machine learning-based failure mode identification of RCSPSW

2021 ◽  
Author(s):  
Dongqi Jiang ◽  
Shanquan Liu ◽  
Tao Chen ◽  
Gang Bi
Keyword(s):  
Machine Learning ◽  
Failure Mode ◽  
Failure Modes ◽  
Shear Failure ◽  
Tall Buildings ◽  
Shear Walls ◽  
Superior Performance ◽  
Ann Model ◽  
Mode Recognition ◽  
Wide Range

<p>Reinforced concrete – steel plate composite shear walls (RCSPSW) have attracted great interests in the construction of tall buildings. From the perspective of life-cycle maintenance, the failure mode recognition is critical in determining the post-earthquake recovery strategies. This paper presents a comprehensive study on a wide range of existing experimental tests and develops a unique library of 17 parameters that affects RCSPSW’s failure modes. A total of 127 specimens are compiled and three types of failure modes are considered: flexure, shear and flexure-shear failure modes. Various machine learning (ML) techniques such as decision trees, random forests (RF), <i>K</i>-nearest neighbours and artificial neural network (ANN) are adopted to identify the failure mode of RCSPSW. RF and ANN algorithm show superior performance as compared to other ML approaches. In Particular, ANN model with one hidden layer and 10 neurons is sufficient for failure mode recognition of RCSPSW.</p>

Cyclic test and numerical analytical assessment of cold-formed thin-walled steel shear walls using tube truss

2019 ◽  
Vol 134 ◽  
pp. 442-459 ◽  
Author(s):  
Jingfeng Wang ◽  
Wanqian Wang ◽  
Yaming Xiao ◽  
Bo Yu
Keyword(s):  
Shear Walls ◽  
Cyclic Test ◽  
Analytical Assessment ◽  
Thin Walled
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