scholarly journals On the Behavior of Coupled Shear Walls: Numerical Assessment of Reinforced Concrete Coupling Beam Parameters

2021 ◽  
Vol 10 (4) ◽  
pp. 197-215
Author(s):  
Omar M. Nofal ◽  
Mostafa Elsayed ◽  
Adel Akl ◽  
Mohamed Abdel-Mooty
Keyword(s):  
Tall Buildings ◽  
Shear Walls ◽  
Shear Wall ◽  
System Response ◽  
Coupling Beam ◽  
Coupling Ratio ◽  
Coupling Beams ◽  
Coupled Shear Wall ◽  
Diagonal Reinforcement ◽  
Beam Parameters

Modern construction of high-rise and tall buildings depends on coupled shear walls system to resist the lateral loads induced by wind and earthquake hazards. The lateral behavior of this system depends on the structural behavior of its components including coupling beams and shear walls. Although many research studies in the literature investigated coupling beams and shear walls, these studies stopped short of investigating the coupled shear walls as a system. Therefore, in this research, the effect of the coupling beam parameters on the nonlinear behavior of the coupled shear walls system was investigated. The full behavior of a 10-story coupled shear wall system was modeled using a series of finite element analyses. The analysis comprised of testing several coupling beam parameters to capture the effect of each parameter on system response including load-deflection behavior, coupling ratio, crack pattern, and failure mechanism. The results indicated that a span-to-depth ratio equal to two is a turning point for the coupling beam behavior. Specifically, the behavior is dominated by ordinary flexure for a ratio of more than two and deep beam behavior for a ratio of less than two. This study showed that the coupling beam width does not have a significant effect on the coupled shear wall response. Additionally, it was concluded that the excessive coupling beam diagonal reinforcement could significantly affect the coupled shear walls behavior and therefore an upper limit for the diagonal reinforcement was provided. Moreover, limitations on the longitudinal and diagonal reinforcement and stirrups are presented herein. The analysis results presented in this paper can provide guidance for practitioners in terms of making decisions about the coupling ratio of the coupled shear walls. 

scholarly journals Experimental Comparison Study on Cyclic Behavior of Coupled Shear Walls with Two-Level-Yielding Steel Coupling Beam and RC Coupling Beam

2018 ◽  
Author(s):  
Guoqiang LI ◽  
Mengde PANG ◽  
Feifei Sun ◽  
Liulian LI ◽  
Jianyun SUN
Keyword(s):  
Energy Dissipation ◽  
Lateral Displacement ◽  
Shear Walls ◽  
Shear Wall ◽  
Cyclic Behavior ◽  
Experimental Comparison ◽  
Coupling Beam ◽  
Coupling Beams ◽  
Coupled Shear Wall ◽  
Steel Coupling Beam

Coupled shear walls are widely used in high rise buildings, since they can not only provide efficient lateral stiffness but also behave outstanding energy dissipation ability especially for earthquake-resistance. Traditionally, the coupling beams are made of reinforced concrete, which are prone to shear failure due to low aspect ratio and greatly reduce the efficiency and ability of energy dissipation.  For overcoming the shortcoming of concrete reinforced coupling beams (RCB), an innovative steel coupling beams called two-level-yielding steel coupling beam (TYSCB) is invented to balance the demand of stiffness and energy dissipation for coupled shear walls. TYSCBs are made of two parallel steel beams with yielding at two different levels.  To verify and investigate the aseismic behaviour improvement of TYSCB-coupled shear walls, two 1/3 scale, 10-storey coupled shear wall specimens with TYSCB and RCB were tested under both gravity and lateral displacement reversals. These two specimens were designed with the same bearing capacity, thus to be easier to compare. The experimental TYSCB specimen demonstrated more robust cyclic performance. Both specimens reached 1% lateral drift, however, the TYSCB-coupled shear wall showed minimal strength degradation. Additionally, a larger amount of energy was dissipated during each test of the TYSCB specimen, compared with the RCB specimen. Based on the experimental results, design recommendations are provided.

scholarly journals Experimental Study and Numerical Simulation on Hybrid Coupled Shear Wall with Replaceable Coupling Beams

2019 ◽  
Vol 11 (3) ◽  
pp. 867
Author(s):  
Yun Chen ◽  
Junzuo Li ◽  
Zheng Lu
Keyword(s):  
Shear Walls ◽  
Shear Wall ◽  
Response Strength ◽  
Middle Part ◽  
Coupling Beam ◽  
Coupling Beams ◽  
Element Analysis ◽  
Retention Capacity ◽  
Coupled Shear Wall ◽  
Replaceable Fuse

The coupled shear wall with replaceable coupling beams is a current research hotspot, while still lacking comprehensive studies that combine both experimental and numerical approaches to describe the global performance of the structural system. In this paper, hybrid coupled shear walls (HSWs) with replaceable coupling beams (RCBs) are studied. The middle part of the coupling beam is replaced with a replaceable “fuse”. Four ½-scale coupled shear wall specimens including a conventional reinforced concrete shear wall (CSW) and three HSWs (F1SW/F2SW/F3SW) with different kinds of replaceable “fuses” (Fuse 1/Fuse 2/Fuse 3) are tested through cyclic loading. Fuse 1 is an I-shape steel with a rhombic opening at the web; Fuse 2 is a double-web I-shape steel with lead filled in the gap between the two webs; Fuse 3 consists of two parallel steel tubes filled by lead. The comparison of seismic properties of the four shear walls in terms of failure mechanism, hysteretic response, strength degradation, stiffness degradation, energy consumption, and strain response is presented. The nonlinear finite element analysis of four shear walls is conducted by ABAQUS software. The deformation process, yielding sequence of components, skeleton curves, and damage distribution of the walls are simulated and agree well with the experimental results. The primary benefit of HSWs is that the damage of the coupling beam is concentrated at the replaceable “fuse”, while other parts remain intact. Besides, because the “fuse” can dissipate much energy, the damage of the wall-piers is also alleviated. In addition, among the three HSWs, F1SW possesses the best ductility and load retention capacity while F2SW possesses the best energy dissipation capacity. Based on this comprehensive study, some suggestions for the conceptual design of HSWs are further proposed.

Hysteretic Behavior of Reinforced Concrete Coupling Beams with Diagonal Headed-Bars

2013 ◽  
Vol 351-352 ◽  
pp. 734-737
Author(s):  
Wan Shin Park ◽  
Young Soo Chun ◽  
Hyun Do Yun ◽  
Soo Yeon Seo ◽  
Jin Kyu Song ◽  
...  
Keyword(s):  
Seismic Behavior ◽  
Shear Wall ◽  
Hysteretic Behavior ◽  
Test Results ◽  
Coupling Beam ◽  
Reinforcing Bars ◽  
Coupling Beams ◽  
Coupled Shear Wall ◽  
Test Variable ◽  
Wall System

This paper addresses the seismic behavior of coupling beams with headed reinforcing bars in coupled shear wall system. Test variable included the replacement ratios of headed reinforcing bars. The results show that Specimen HB 50 exhibits a better stable behavior in comparison with Specimens Specimen CON and Specimen HB 30. Test results showed that the amount of diagonal reinforcing bars in the coupling beam may be reduced when headed reinforcing bars are utilized.

Research Status on Seismic Performance of Steel-Concrete Composite Coupling Beam

2013 ◽  
Vol 671-674 ◽  
pp. 1315-1318
Author(s):  
Qing Xuan Shi ◽  
Jian Bo Tian ◽  
Kun Li ◽  
Zhi Feng Guo
Keyword(s):  
Influence Factors ◽  
Shear Wall ◽  
High Load ◽  
Coupling Beam ◽  
Coupling Beams ◽  
Specific Calculation ◽  
Coupled Shear Wall ◽  
Energy Dissipation Capacity ◽  
New Form ◽  
Wall System

Coupling beams of coupled shear wall system in seismic regions are required to have high load resisting capacity and excellent ductility and energy-dissipation capacity. To achieve this goal, the concept of steel-concrete composite coupling beam is proposed. The steel-concrete composite coupling beam is a new form and worthwhile to research and promote. Further, it is a new direction for the future development of the coupling beam. But there is a lack of specific calculation method and constructional measures in the current related codes. In this paper, the review of available literatures is made including the experimental study and influence factors of mechanical behavior. It works that have not yet been covered after summarizing each research methods and research contents, which will provide scientific reference material for the intensive research on steel-concrete composite coupling beam.

The Seismic Behavior of Pseudo Strain-Hardening Cemetitious Composites Coupling Beams with Polyvinyl Alcohol Fiber

2013 ◽  
Vol 353-356 ◽  
pp. 2119-2122
Author(s):  
Wan Shin Park ◽  
Nam Yong Eom ◽  
Sun Woong Kim ◽  
Young Il Jang ◽  
Hyun Do Yun
Keyword(s):  
Strain Hardening ◽  
Seismic Behavior ◽  
Failure Modes ◽  
Shear Wall ◽  
Coupling Beam ◽  
Cementitious Composite ◽  
Coupling Beams ◽  
Coupled Shear Wall ◽  
Pseudo Strain Hardening ◽  
Steel Coupling Beam

This paper addresses the seismic behavior of pseudo strain hardening cementitious composite (PSH2C) coupling beams with different failure modes in hybrid coupled shear wall. Test variables included the ratio of steel coupling beam strength to beam-wall connection strength. The results show that Specimen PSH2C-SCF exhibits a better stable behavior in comparison with Specimens PSH2C-SBVRT and PSH2C-FCF.

Optimization Design for Coupling Beam Dampers of Shear Walls

2013 ◽  
Vol 444-445 ◽  
pp. 115-121 ◽  
Author(s):  
Zhe Zhang ◽  
Jin Ping Ou ◽  
Zheng He
Keyword(s):  
Carrying Capacity ◽  
Optimization Design ◽  
Shear Walls ◽  
Shear Wall ◽  
Hysteretic Behavior ◽  
Coupling Beam ◽  
Kriging Surrogate Model ◽  
Coupled Shear Wall ◽  
Wall Structures ◽  
High Level

The couple shear wall structures are well known for their anti-lateral stability, they have a promising future in macro complex high-level structures. Coupling beam dampers are the key components of coupled shear wall structures. In this manuscript, metallic in plane yield coupling beam damper with four types of poration and different pore areas are analyzed by Finite Element Method. It is found that the hourglass-shaped poring coupling beam damper has superior hysteretic behavior and higher carrying capacity comparing to other types of poring damper. In addition, the optimized poration parameters are further obtained by using Kriging surrogate model, which maximize the carrying capacity and enhance hysteretic behavior of the hourglass-shaped coupling beam damper.

Stiffness and Energy Dissipation of Steel Coupling Beam Embedded in the PSH2C and Normal Concrete Shear Wall

2013 ◽  
Vol 351-352 ◽  
pp. 556-559
Author(s):  
Sun Woong Kim ◽  
Wan Shin Park ◽  
Nam Yong Eom ◽  
Hyun Do Yun ◽  
Young Il Jang
Keyword(s):  
High Stress ◽  
Shear Wall ◽  
Cement Composites ◽  
Coupling Beam ◽  
Lateral Loads ◽  
Coupling Beams ◽  
High Rise ◽  
Coupled Shear Wall ◽  
Steel Coupling Beam ◽  
Steel Coupling Beams

Hybrid coupled shear wall with steel coupling beams has often been used as load-resisting system of high-rise buildings under lateral loads. However, joint between steel beam and shear wall is under combined and high stress. Reinforcement details of the joint are very heavy. This study addresses the effect of shear wall cement composites type in hybrid wall system on the seismic performance of steel coupling beams embedded in shear wall. The main test variables were the failure mode of steel coupling beam and types of cement composites, such as PSH2C and concrete, for shear wall.

scholarly journals Investigation on the Structural Behavior of Shear Walls with Steel Truss Coupling Beams under Seismic Loading

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Zhiheng Deng ◽  
Changchun Xu ◽  
Qiang Hu ◽  
Jian Zeng ◽  
Ping Xiang
Keyword(s):  
Cross Sections ◽  
Design Method ◽  
Three Dimensional ◽  
Shear Walls ◽  
Seismic Energy ◽  
Shear Wall ◽  
Coupling Beam ◽  
Coupling Beams ◽  
Steel Truss ◽  
Seismic Behaviors

Based on existing experimental results, the finite element analyses were carried out on shear wall structures with steel truss coupling beams. This work studied the seismic behaviors and the working mechanism of the steel truss coupling beam at the ultimate state and put forward two parameters: the area ratio of web member to chord and the stiffness ratio of coupling beam to shear wall. The seismic optimum design method of the coupling beam was also proposed. Afterwards, a comparative analysis was implemented on the three-dimensional shear wall model with steel truss coupling beams designed by the proposed design method. The results show that the structures designed by the proposed method have excellent seismic behaviors, the steel truss coupling beams have enough stiffness to connect shear walls effectively, and its web members have appropriate cross sections to dissipate seismic energy.

scholarly journals Invistigating the effects of frp bars on the seismic behavior of reinforced concrete coupling beams

2019 ◽  
Vol 10 (8) ◽  
pp. 1819
Author(s):  
Mojtaba Fallahi ◽  
Sajjad Sayyar Roudsari ◽  
Taher M Abu-Lebdeh ◽  
Florian Ion T. Petrescu
Keyword(s):  
Finite Element ◽  
Seismic Behavior ◽  
Shear Walls ◽  
Shear Wall ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Coupling Beams ◽  
Element Analysis ◽  
Coupled Shear Wall ◽  
Reinforced Polymer

Sometimes, it is necessary to install regular openings like windows or doors in the shear walls. Such openings require special reinforcement. There are several methods for reinforcing deep beams, one of which is the use of fiber reinforced polymer bars. In this study, an experimental work on a coupled shear wall has been used to mode the system by using finite element method with ABAQUS software. The finite element model was established based on part of the experimental study and verified with the other parts of the experimental results. The comparison shows good agreement. In the study, three different types of fiber reinforced polymer bars were considered in improving the mechanical and structural behavior of RC coupling beams. Results of the finite element analysis showed the superiority of the CFRP bars in improving seismic behavior of the coupled shear wall comparing to GFRP and BFRP.

The Influence on Horizontal Ties of Steel Coupling Beams

2012 ◽  
Vol 204-208 ◽  
pp. 1229-1232
Author(s):  
Sun Woong Kim ◽  
Wan Shin Park ◽  
Nam Young Eom ◽  
Hyun Do Yun
Keyword(s):  
Strain Hardening ◽  
Tall Buildings ◽  
Shear Wall ◽  
Lateral Load ◽  
Cementitious Composite ◽  
Coupling Beams ◽  
Coupled Shear Wall ◽  
Pseudo Strain Hardening ◽  
Steel Coupling Beams ◽  
Wall System

Hybrid coupled shear wall system with steel coupling beams has known as the effective lateral load resisting system for tall buildings subjected to earthquake. This paper addresses the influence on horizontal ties of steel coupling beams in pseudo strain hardening cementitious composite (PSH2C) hybrid coupled shear wall. Test variables included the connection detail and types of material, concrete and PSH2C, in the connection region. The results show that Specimen PSH2C-SB and PSH2C-SBVRT exhibits a better stable behavior than Specimens HCWS-SB and HCWS-SBVRT.

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