Analytical Study on the Dynamic Properties of Viscoelastically Coupled Shear Walls in High-Rise Buildings

Pant, Deepak Raj; Montgomery, Michael; Christopoulos, Constantin

doi:10.1061/(asce)em.1943-7889.0001247

Cited by 13 publications

(5 citation statements)

References 28 publications

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“…3,4 Christopoulos et al [5][6][7] developed a viscous coupling damper (VCD) with a replaceable shear-critical structural fuse to accommodate the short span of the coupling beams. Nonlinear dynamic analysis indicated that fewer coupling beams were damaged or required repair due to the installation of VCDs, 5 and analytical models of the VCDs 8 as well as the tall shear walls with VCDs were proposed and verified. 9 Kim et al 10 proposed a new type of hybrid energy-dissipation coupling beam that consisted of U-shaped steel plates and high damping rubbers.…”

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confidence: 99%

“…Nonlinear dynamic analysis indicated that fewer coupling beams were damaged or required repair due to the installation of VCDs, 5 and analytical models of the VCDs 8 as well as the tall shear walls with VCDs were proposed and verified. 9 Kim et al 10 proposed a new type of hybrid energy-dissipation coupling beam that consisted of U-shaped steel plates and high damping rubbers. The improved seismic performance of the shear wall with the new type of coupling beam was verified via a static cyclic loading test 10 and shaking table test.…”

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confidence: 99%

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Shaking table tests and numerical analyses of an RC coupled wall structure with replaceable coupling beams

Chen

Jiang

et al. 2018

Earthq Engng Struct Dyn

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Summary The replaceable coupling beam (RCB) is an innovative structural component developed to increase the seismic resilience of reinforced concrete (RC) shear wall structures. In this study, two 1/5‐scale 5‐story 3‐dimensional RC shear wall structures—one with conventional RC coupling beams and the other with RCBs—were designed, constructed, and tested on a shaking table. The failure pattern, dynamic properties, and structural responses, including the acceleration, displacement, story force, and strain responses, of the 2 structures are compared under earthquake excitations. The test results demonstrate that the seismic performance of the structure with RCBs was improved when RCBs were working compared with the structure with conventional RC coupling beams. In addition, the replaceable devices suffering the severe damage during an earthquake can be conveniently replaced after the earthquake. However, after the sudden failure of RCBs during the severe earthquakes, the inter‐story drift and floor acceleration of the structure with RCBs became larger. The design and manufacture quality of RCBs should be improved to avoid the sudden failure. Then, numerical models for the test structures were established using the commercial software PERFORM‐3D. Numerical simulations of the tests were conducted. The simulation results correspond well with the experimental results, thus verifying the accuracy of the numerical models. The RC shear wall structure installed with RCBs can be applied as a new type of earthquake‐resilient structure in engineering practice.

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confidence: 99%

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confidence: 99%

Shaking table tests and numerical analyses of an RC coupled wall structure with replaceable coupling beams

Chen

Jiang

et al. 2018

Earthq Engng Struct Dyn

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“…The CB was found to exhibit excellent chord rotation and energy dissipation capacity. The seismic response of the overall structure with replaceable CB was also studied and found to be significantly enhanced (Lv et al, 2018;Pant et al, 2017), verifying the feasibility of the design concept, assuming that the permanent set of the damaged structure can be resumed.…”

Section: Introductionmentioning

confidence: 87%

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

Liu

Cheng

et al. 2022

Advances in Structural Engineering

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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.

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“…Therefore, FNAs and direct-integration RHAs were used in this study, which are accurate methods of carrying out such analysis for buildings with linear damping devices such as VCDs. Alternatively, complex modal analysis-based methods that are not available in ETABS and Perform-3D but can be implemented using other computer programs can also be used Xu 1999, 2000;Pant et al 2017a).…”

Section: Wind Testsmentioning

confidence: 99%

Full-Scale Testing of a Viscoelastic Coupling Damper for High-Rise Building Applications and Comparative Evaluation of Different Numerical Models

Pant

Montgomery²,

Christopoulos

2019

J. Struct. Eng.

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Viscoelastic coupling dampers (VCDs) are used for the seismic and wind protection of tall buildings. In the past, several tests have been carried out on VCDs under severe loading conditions for concept validation purposes and different numerical models have been used for evaluating the performance of tall buildings with VCDs. Nonetheless, for practical applications understanding the performance of VCDs over a full range of demands including extremely small amplitudes of vibration, long-duration loading, and realistic well-defined design level seismic and wind events, as well as a comparative evaluation of different numerical models are needed. To address this research gap, a systematic study was carried out to understand the performance of VCDs based on full-scale tests and to assess the suitability of different numerical models in predicting their response. A range of displacement-controlled tests was carried out on a full-scale VCD specimen. Seismic loading was derived by considering both far-fault long-period long-duration ground motions as well as near-fault pulse-like ground motions that were developed based on a site-specific study and were scaled to represent the design earthquake (DE) and the risk-targeted maximum considered earthquake (MCE R) levels for a real project. Long-duration wind loading of 6-h with 1-, 10-, 50-, and 500-year mean recurrence intervals (per Canadian practice) developed based on wind tunnel testing of another real project were used. The temperature rise in the specimen during the tests was measured using high-precision thermocouples embedded in the viscoelastic (VE) layers as well as an external thermal camera. The test results indicated well-defined force-deformation hystereses of the specimen at all levels of strain amplitudes including those at extremely small deformation amplitudes up to 2.5 μm of deformation. The temperature rise of the specimen was less than 1°C and 4°C, respectively for the earthquake and wind loadings representative of the real projects that were considered in this study. This temperature rise was found to be lower when compared with previous generations of VE materials, which were tested under loading representative of shorter buildings with higher fundamental frequencies. Finally, the accuracy of four different macroscopic numerical models with different degrees of complexities in simulating the test results was investigated. Different numerical models were found to be suitable for different loading conditions and recommendations are provided for practical nonlinear modeling of tall buildings with VE dampers.

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Analytical Study on the Dynamic Properties of Viscoelastically Coupled Shear Walls in High-Rise Buildings

Cited by 13 publications

References 28 publications

Shaking table tests and numerical analyses of an RC coupled wall structure with replaceable coupling beams

Shaking table tests and numerical analyses of an RC coupled wall structure with replaceable coupling beams

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

Full-Scale Testing of a Viscoelastic Coupling Damper for High-Rise Building Applications and Comparative Evaluation of Different Numerical Models

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