Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userComparing of seismic behaviour for Reinforced Concrete Frames strengthened by adding shear wall or steel bracing
مقارنة السلوك الزلزالي للإطارات البيتونية المسلحة المقواة بشبكات تربيط معدنية او بإضافة جدران قص
2313
2 47
0
(
0
)
Authors
ميادة الكوسا( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
أن معظم الابنية القائمة لا تحقق الاشتراطات التصميمية الخاصة بمقاومة الاحمال الزلزالية لذلك يعد التدعيم لرفع كفآء المنشآت ضرورة لتخفيف الخطر الزلزالي. وهناك العديد من الطرق لرفع هذه الكفاءة , تناولت هذه الدراسة مقارنة لطريقتي تدعيم او تقوية بإضافة جدران قص وتدعيم بإضافة شبكات تربيط معدنية بشكل X وشبكات تربيط معدنية بشكل V , وقد أظهرت الدراسة اهمية استخدام شبكات التربيط في الأنظمة الانشائية المستخدمة للتدعيم لمقاومة الاحمال الزلزالية حيث تتميز باتها تزيد صلابة المبنى دون ان تسبب زيادة كبيرة في الوزن بالتالي عدم تأثيرها على الاساسات وكذلك دون ان تؤثر على الوظيفة المعمارية كما ان لها دور مهم في تبديد الطاقة. واظهرت الدراسة ان فرض قيمة ثابتة لمعامل الاستجابة R كما هو وارد في الكود العربي السوري و UBC 97 غير دقيقة, حيث اتضح تأثير عدد الطوابق وشكل التربيط ومجاز الاطارات على قيمة معامل الاستجابة.
Most existing structures are not designed with cod requirements to meet seismic risk, Therefor methods for strengthening and stiffening existing buildings are important . This study is comparing between strengthening by adding shear wall or by adding steel bracing.X -V The study shows the importance of using steel bracing system that is excellent approach for strengthening and stiffening existing buildings with small increase in mass ,the study also approved that the constant value of R(response factor)(as mentioned in the Syrian code and UBC97) is not completely correct.
References used
Maheri M. R. and Sahebi A, “Use of steel bracing in reinforced concrete frames”, Eng. Struct. 2003, 19 (12), 1018 – 1024.me with concentric internal steel bracing ” , Eng. Struct ., 2007, 29 , 1561 ,1568
Maheri M. R;Karihaloo, B. ;Alaee, F. J,” Seismic performance parameter of RC beams retrofitted by CARDIFRC, Engineering Structure”, 262004, 2069 – 207
GhaffarzadehH;MaheriM.R., “Cyclic Tests on the Internal Braced RC Frames. JSEE: Fall 2006, Vol. 8, No
Bush T.D., Jones E. A. and Jirsa J. O, “Behavior of RC frame strengthened using structural steel bracing”, Proc. ASCE, J. Struct. Eng., 2008, 117 (4), 1115- 1126
Viswanath, K.G; Prakash, K.B; Anant Desai . Seismic Analysis of Steel Braced Reinforced Concrete Frames
rate research
Read More
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.
This research investigates the behavior of RC frames
strengthened using steel jacket technique and the impact of using
this technique on the frame specifications was examined in terms of
rigidity, ductility and resistance.
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 eff
ect 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.
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.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
