Modified three‐dimensional seismic assessment method for buildings based on ambient vibration tests: extrapolation to higher shaking levels and measuring the dynamic amplification portion of natural torsion

Mirshafiei, Farshad; McClure, Ghyslaine

doi:10.1002/eqe.2746

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…The specific steps are divided into data collection, pre-processing, calculation, output, etc. [7]. The structure of data fusion can be divided into three forms: serial, parallel and mixed.…”

Section: Combined Sensor Data Fusionmentioning

confidence: 99%

Combined Sensor Method for Measuring Torsional Vibration and Anti-Collapse Performance of Steel Frame under Strong Earthquake

2022

IJETC

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As the main torque sensor for real-time monitoring work, its development is of great significance to people. People use torque sensors to monitor and control torque in real time, which is critical to ensure the safe operation of the test system. This research is mainly to use the combined sensor method to measure the torsional vibration of the structure and analyze the anti-collapse performance of the shock-absorbing steel frame under strong earthquake. Experimental data shows that the limit bending moment of JD01 without end plate reinforcement is 130.7 kN• m, while the limit bending moment of end plate reinforcement is 160.7 kN• m. Compared with JD01, the bending ability of JD02 has increased by 22.95%. The results of the study show that the configuration of the reinforcing material of the bottom plate can effectively alleviate the stress concentration problem of the bottom plate, limit the surface deformation of the bottom plate, improve the rotation capacity of the node, and improve the support capacity of the node. The buckling restraint support can act as a reverse member of the elastic stage, supporting part of the horizontal shear force. The elastoplastic stage effectively adjusts the reverse side rigidity of the floor, adjusts the shear distribution of the floor, reduces the shear value of each layer, and finally delays the main bearing member to enter the elastic stage.

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Section: Combined Sensor Data Fusionmentioning

confidence: 99%

Combined Sensor Method for Measuring Torsional Vibration and Anti-Collapse Performance of Steel Frame under Strong Earthquake

2022

IJETC

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“…Mirshafiei et al [8], for structures with slight damage, established a three-dimensional seismic damage assessment method based on on-site environmental vibration measurements of acceleration and velocity sensors. This method considers the torsion effect and has been extended to more severely damaged structures [9]. However, they actually established a structure response and vibration data output system for damage assessment of three-dimensional structures.…”

Section: Introductionmentioning

confidence: 99%

A Three-Dimensional Seismic Damage Assessment Method for RC Structures Based on Multi-Mode Damage Model

Guo,

Liu,

Wang

et al. 2024

Buildings

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To rationally evaluate the seismic damage of RC structures comprehensively and multi-dimensionally, a damage index calculation method is proposed. This is a macroscopic global seismic damage model that considers torsional damage, damage in two perpendicular horizontal directions, as well as the overall damage, based on the modal characteristics of the three-dimensional structure and the multi-mode damage model. Formulas are derived, and the steps for damage evaluation are summarized. To better illustrate the results of the proposed method, an example of an asymmetric 6-story frame-shear wall structure is built using the OpenSees program. Thirteen ground motions are selected for incremental dynamic analysis. The structure’s damage indexes are evaluated according to the proposed method and compared with the corresponding structural responses, He et al.’s index, and the Final Softening index. The results demonstrate that the proposed method can fully reflect the macroscopic damage state of the structure from different perspectives. Additionally, the results show that, despite the ground motion only acting in the y-direction, the structure exhibits responses and damage in both the x-direction and the torsional direction. The overall damage to the structure is primarily controlled by the torsional damage, attributed to the asymmetric arrangement of shear walls. The torsional effect is the key factor leading to the failure of asymmetric structures during earthquakes. Therefore, ensuring the torsional strength of the structure is crucial during the structural design process.

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“…In addition, it can also effectively reduce production costs. For the energy dissipation and shock absorption design of the structure with given structural reinforcement and section size, the use of direct design method can reduce the iterative process and improve the efficiency of structural design [9]. Therefore, a design method for viscoelastic damper that can consider the multi-level seismic action is established in this paper, which avoids the iterative trial calculation process of the traditional design method.…”

Section: Introductionmentioning

confidence: 99%

Analysis and optimization of seismic performance of high-rise residential building

Wang¹,

Chang²,

Kong³

et al. 2022

J. vibroeng.

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In order to improve the seismic performance of high-rise buildings, a friction damper installation scheme was proposed in the paper. Through numerical simulation and experimental testing, the vibration reduction effect was compared and verified. Herringbone structure was applied to install friction damper in the bearing wall. Based on this vibration reduction scheme, the finite element model of high-rise building was established, and the influence of damper on the modal characteristics of building frame was analyzed. It can be known that the damper has little influence on the natural frequency, but has a great influence on the amplitude range of the excitation response. In the finite element model, two kinds of seismic waves were applied, the strength and dynamic response was simulated and calculated, and the maximum deformation and stress results were obtained. Compared with the initial model, it can be known that the more intense the vibration is, the more obvious the damping effect of the damper is. A seismic excitation simulation system based on acceleration sensor detection is designed and applied to the wall vibration test. The results show that the maximum vibration acceleration of the measured point is reduced by 26.3 % by the damper, and the stable seismic effect can still be maintained during the impact of extension. Compared with the traditional hardness and volume reinforcement scheme, the friction damper can reduce the production cost and improve the adaptability to seismic wave excitation, which provides an important basis for seismic research in other fields.

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Modified three‐dimensional seismic assessment method for buildings based on ambient vibration tests: extrapolation to higher shaking levels and measuring the dynamic amplification portion of natural torsion

Cited by 6 publications

References 18 publications

Combined Sensor Method for Measuring Torsional Vibration and Anti-Collapse Performance of Steel Frame under Strong Earthquake

Combined Sensor Method for Measuring Torsional Vibration and Anti-Collapse Performance of Steel Frame under Strong Earthquake

A Three-Dimensional Seismic Damage Assessment Method for RC Structures Based on Multi-Mode Damage Model

Analysis and optimization of seismic performance of high-rise residential building

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