Friction Damper in Steel Coupling Beams for Enhanced Seismic Resilience of High-rise Buildings

Qu, Zhe; Ji, Xiaodong; Wang, Yandong; Shi, Xiaowei; Xie, Jinzhen

doi:10.2749/222137815815775448

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…The improved seismic performance of the shear wall with the new type of coupling beam was verified via a static cyclic loading test and shaking table test . Chung et al and Qu et al proposed 2 different types of friction dampers in the central part of coupling beams to control the seismic response of high‐rise RC buildings. Mao et al studied a shape memory alloy damper in the middle of an RC coupling beam.…”

Section: Introductionmentioning

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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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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Section: Introductionmentioning

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

View full text Add to dashboard Cite

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Self-adaptive approach for optimisation of passive control systems for seismic resistant buildings

Eljajeh¹,

Petkovski

2018

Bull Earthquake Eng

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The concept of passive control of the seismic response of structures was introduced to improve the performance of structures by increasing their energy dissipation and reduce or eliminate damage in the structural elements. The key task in the design of passive systems is to determine the forces in the control devices (yield/slip or post-tensioning) at each floor, that will result in best performance (e.g. minimum inter-storey drift). This can be achieved by large parametric studies in which both the maximum control force (e.g. at ground level) and the distribution of forces along the height of the structure are varied. Alternatively, optimum forces in the devices can be achieved by semi-active control, where the structure self-adapts to the earthquake. Both solutions are expensive: the first requires hundreds of non-linear response simulations in the design stage; the second needs a system of sensors, controllers and electromechanical devices. Presented here is a new Self-Adaptive Optimisation Approach (SAOA) in which the self-optimisation of a semi-active system is used in the design stage and the resulting distribution of control forces is adopted as a passive system. The new approach was evaluated through comparing the simulated dynamic responses of two relatively simple benchmark structures (braced and post-tensioned) with three sets of control forces: (i) passive system with forces obtained in parametric study, (ii) semi-active system with self-adapting control forces, and (iii) passive system with SAOA-optimized forces. The results show good performance of the SAOA systems, indicating that SAOA offers a simple and effective solution that can replace the existing optimisation approaches for the design of passively controlled earthquake resistant structures. This study presents a novel idea of using the semi-active control as a tool for optimising a passive control system. The passive control systems can be further improved by a larger study in which the semi-active control algorithms are also optimised.

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Friction Damper in Steel Coupling Beams for Enhanced Seismic Resilience of High-rise Buildings

Cited by 2 publications

References 12 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

Self-adaptive approach for optimisation of passive control systems for seismic resistant buildings

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