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Register a new userBehavior of Dual structural Systems Consisting of multi-storey, multi-span, Reinforced-Concrete Frame with Perforated Steel Plate Shear Walls
سلوك الأنظمة الإنشائية الثنائية المكونة من إطار بيتوني مسلح متعدد الطوابق و المجازات مع صفائح معدنية مثقبة كجدران قص
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تعد الإطارات من الجمل الإنشائية لمقاومة الأحمال الزلزالية، و يتم رفع كفاءة الإطارات بطرق عدة و من الطرق المتبعة إضافة صفائح معدنية ضمن الإطار لتعمل كجدران قص. يهدف البحث لدراسة تأثير تقوية الإطارات البيتونية المسلحة بإضافة صفائح معدنية مثقبة كجدران قص لتشغل مجاز الإطار. حيث استخدم التحليل العددي باستعمال نظرية العناصر المحدودة (Finite Element Method) و اعتمد التحليل الستاتيكي اللاخطي بطريقة الدفع الجانبي المتزايد (Pushover) الذي يأخذ بعين الاعتبار لاخطية المادة و تأثير التشوهات الكبيرة (Geometrically and Materially Non-Linear Analysis), لدراسة سلوك الإطار البيتوني المسلح المملوء بصفيحة معدنية مثقبة لمقاومة الأحمال الجانبية، كما تم دراسة تأثير زيادة عدد الثقوب و مساحة الثقوب و تدعيم محيط الثقوب و تأثير ذلك على المقاومة. يبين هذا البحث أن تقوية الإطارات البيتونية المسلحة بجدران قص معدنية مثقبة مع تدعيم محيط الثقوب قد أدى إلى زيادة المقاومة بشكل ملحوظ بالإضافة إلى خفض الانتقال.
Frame structures contribute to resist the seismic loads. On the other hand, many techniques were used to improve the resistance against lateral loads where steel shear walls are considered to be one of these ways. This research aims to study the effect of strengthening of the reinforced concrete frames inserting perforated steel plate shear walls embedded within the frame. This study applied numerical analysis using Finite Element Method (FEM) using nonlinear pushover analysis based on geometrically and Materially Non-Linear Analysis (GMNLA) was performed. To study the behavior of the steel plate that seal the hall span of the reinforced concrete frame against lateral loads. Moreover, perforated steel plate was studied taking under consideration the effect of the number and the area of the perforations and strengthening of the perforations circumference on the resistance was observed. This study conclude that using a perforated steel plate shear wall with reinforced- concrete frames and strengthening of the perforations circumference can enhance the resistance significantly beside that it decrease the frame deflection.
References used
ABAQUS, Version 6.12, 2012- ABAQUS/Standard User`s Manual, ABAQUS Inc USA
Eurocode 2: Design of concrete structures, 2008 - Part 1-1: General rules and rules for buildings. Brussels :CEN
Shamass R, 2011 -Numerical analysis of single dried key jont in precast concrete segmental bridge . Master thesis, Brunel University,UK
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Frame structuressystems contribute to resist the seismic loads. And there are many
techniques used to improve the resistance to lateral loads where steel shear walls,which is
embedded within the Frame span, are considered to be one of these ways.
This research aims to study the effect of strengthening of the reinforced concrete
frames by inserting partial steel plate shear walls, the opening is parallel to beams,
embedded within the frame. This study applied numerical analysis using Finite Element
Method (FEM) using nonlinear pushover analysis based on geometrical and Material Non-
Linear Analysis (GMNLA). Using these methods allow us to study the behavior of the
Partial steel plate that seal the whole span of the reinforced concrete frame with opening
parallel to beams against lateral loads.
This study conclude that using a partial steel plate shear wall, with opening parallel
to beams with reinforced- concrete frames can enhance the resistanceand the seismic
energy dissipation significantly.
Frame structures contribute to resist the seismic loads. On the other hand, frames
work efficiently to increase the ductility of buildings. Therefore, many techniques were
used to improve the resistance against lateral loads where steel shear walls
are considered
to be one of these ways.
This research aims to study the effect of inserting steel shear wall on the resistance of
the reinforced concrete frame against earthquake loads. In this study, Finite Element
Method (FEM) using Geometrically and Materially Non-Linear Analysis (GMNLA) was
performed. Pushover analysis is used to explore the behavior of the steel plate in-filled
reinforced concrete frame against lateral loads. Moreover, the effect of plate thickness was
undertaken. On the other hand, an opening is made in this plate. Then, the influence of the
position and dimension of this opening on the resistance was observed.
This study shows that using a steel plate shear wall with or without opening can
enhance the resistance to seismic loads significantly together with the deflection decrease.
Braced frames and steel plate shear walls (SPSWs) have both been shown
to be useful in the seismic retrofit of buildings. While both
these systems have merit, no guidance exists to determine which of the
two approaches is preferable in terms of pr
oviding maximum
displacement ductility and energy dissipation per cycle for a given
strength. This paper describes and compares results from numerical
evaluation using FEM, in which the nonlinearity of materials and the
nonlinear effects of the large displacement was included for tow frames.
The results of numerical study was identical to the experimental tests,
then a barometric study was achieved by changing the thickness of infill
plate then the area of the cross sections of braces, after that the width of
the frame was modified.
The result shown that using steel infill plate is preferable when the
dimension of bay is three times the height, while using braces is more
adequate for frames in which the dimension of bay is less than three times
the height.
Structural Frame system is considers as an earthquake resisting structural
systems. On the other hand, many techniques were used to improve the
resistance against lateral loads. where Steel Plate Shear Wall fixed within
frame span is one of those
techniques.
This research aims to develop the Strip model of Partial Steel Plate Shear
Walls with Reinforced-Concrete Frame with opening parallel to beams.
In this paper the effect of the distinctive properties of Shape Memory Alloy (SMA)
―the ability to undergo large deformation and restore it after stress removal‖ has been
studied to see to what degree it may affect the structural performance of mul
ti-storey tall
buildings.
Using ANSYS software, two 3D Finite Element (FE) models are built for a
composite multi-storey building (20 story) which is resistant to lateral loads by bracing
system. One of them is with steel bracing and the other is with SMA bracing. Both models
take into account nonlinear material properties of elements and geometric nonlinearity.
The model with SMA material shows improved performance compared with the
model of steel bracing in terms of residual deformations and ductile performance.
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