Seismic behavior of hybrid coupled shear wall with replaceable U-shape steel coupling beam using terrestrial laser scanning

2022 ◽  
pp. 136943322110655
Author(s):  
Huifeng Hu ◽  
Jiepeng Liu ◽  
Guozhong Cheng ◽  
Yao Ding ◽  
Yohchia Frank Chen
Keyword(s):  
Energy Dissipation ◽  
Seismic Behavior ◽  
Laser Scanning ◽  
High Strength ◽  
Shear Wall ◽  
Concrete Cover ◽  
Coupling Beam ◽  
Coupled Shear Wall ◽  
Bolt Holes ◽  
Chord Rotation

The hybrid coupled shear wall (HCW) with replaceable coupling beam (CB) is an optimal component to recover buildings promptly after a severe earthquake. However, the reinstallation may be difficult or impossible with an identical CB because of the inelastic relative dislocation between two wall piers. This study proposes a novel HCW with different reinforcement ratios in the connection, which was tested under cyclic loading. After the test, the bolt holes can be located through terrestrial scanning, which is then utilized to fabricate a new CB that can accommodate the deformation between two wall piers. The newly replaced HCW system was also tested. As a result, all virgin test specimens fail in web fracture and show a significant inelastic chord rotation of 0.2 rad, exhibiting an excellent energy dissipation capacity. Meanwhile, the new method to locate the bolt holes after the test is feasible. The replaced HCW fails in the pull-off of anchor bars and shows poor seismic behavior due to the unpatched concrete cover in the connection. To improve the energy dissipation for the replaced HCW, high-strength grouting in the connection can be used and high-strength material can be used to replace the usual anchor bolts.

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.

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.

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.

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.

Experimental Study on Seismic Behavior of Double-Wall Precast Concrete Shear Wall

2014 ◽  
Vol 919-921 ◽  
pp. 1812-1816 ◽  
Author(s):  
Quan Dong Xiao ◽  
Zheng Xing Guo
Keyword(s):  
Energy Dissipation ◽  
Seismic Behavior ◽  
Failure Modes ◽  
Precast Concrete ◽  
Shear Walls ◽  
Shear Wall ◽  
Initial Stiffness ◽  
Displacement Ductility ◽  
Energy Dissipation Capacity ◽  
Double Wall

To study the seismic behavior of Double-Wall Precast Concrete (DWPC) shear wall, three full scale specimens are tested and compared under low-cyclic reversed loading, including two DWPC shear walls and one normal Cast-In-Situ (CIS) shear wall. By observing their experimental phenomena and failure modes, contrasting their displacement ductility coefficients, hysteretic curves, skeleton curves and energy dissipation capacity, the seismic behavior were synthetically evaluated on aspects of strength, stiffness, ductility and energy dissipation. Compared with CIS specimen, DWPC specimens have higher initial stiffness, increased cracking loads by 43% to 47%, and the ultimate loads increased by 22% to 23%. The displacement ductility ratios also meet the ductility requirements with value of 5. The hysteretic curves of three specimens are plump, and the trend of skeleton curves is basically the same. The DWPC specimens demonstrated a good energy dissipation capacity. All the specimens had shown favorable seismic performance.

scholarly journals Experimental study on the seismic behavior of coupled shear wall with concealed partitioned steel plates

2016 ◽  
Vol 18 (4) ◽  
pp. 2304-2318
Author(s):  
Hao Liu ◽  
Wanlin Cao ◽  
Hongying Dong ◽  
Jianwei Zhang
Keyword(s):  
Experimental Study ◽  
Seismic Behavior ◽  
Shear Wall ◽  
Steel Plates ◽  
Coupled Shear Wall

Cyclic behaviour of bearing-type bolted connections with slot bolt holes

2018 ◽  
Vol 22 (3) ◽  
pp. 792-801
Author(s):  
Guo-qiang Li ◽  
Zhao-xin Hou ◽  
Ying-zhi Sun ◽  
Chao Gong ◽  
Jian Jiang
Keyword(s):  
Energy Dissipation ◽  
Cyclic Load ◽  
High Strength ◽  
Dual Function ◽  
Bolted Connections ◽  
Cyclic Behaviour ◽  
Good Energy ◽  
Bolt Holes ◽  
Energy Dissipation Capacity ◽  
Sliding Force

This article experimentally studies the behaviour of high-strength bolted connections with slot bolt holes under cyclic load to evaluate its seismic performance. A total of six specimens varying in the bolt diameters and pretension are designed and tested. The results show the connections with slot holes have good energy dissipation capacity. It is found that connections with M30 bolts, of which the hysteretic loops are fuller, have better energy dissipation capacity than that of M20 bolts connections. With the increase of number of loading cycles, the sliding force of the connections decreases. On the other hand, the ultimate bearing capacity of the connections does not decrease much both for M30 and M20 bolts. As the experiments proceed, the friction coefficients and the areas of the hysteresis curves decrease in a similar trend because of the smoothing of surfaces. The experimental results indicate the potential application of the connections with slot bolt holes as dual-function parts in structures to simultaneously provide stiffness and energy dissipation capacity.

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