Influence of Higher Modes of Vibration on the Seismic Response of Buildings with Linear and Nonlinear Viscous Dampers

Santos-Santiago, Marco A.; Ruiz, Sonia E.; Valenzuela-Beltran, Federico

doi:10.1080/13632469.2020.1822223

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…Due to the high porosity of soft rock layers and the uneven bonding force of mixed components, the average compressive strength of the rock layers is low. Especially in humid production environments, rock mass flow is prone to occur under relatively small vibration or excitation forces [2]. Therefore, improving the support effect of large deformation tunnels has always been a technical challenge in civil engineering.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of soft rock tunnel under composite support conditions

Wu,

2024

J. vibroeng.

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In order to effectively improve the seismic and impact resistance performance of soft rock tunnels, a composite support method was proposed and validated in the paper. The UDEC (Universal Distinct Element Code) model of soft rock layers was established, and the movement and subsidence characteristics of the roof and floor of the rock layers under impact loads was simulated and calculated. As a result, a composite support scheme with good cushioning performance was proposed. The top and sides of the tunnel were supported by a combination of anchor rods of different lengths and metal mesh, reinforced by steel beams and vibration absorbing filler around. The anchor rod was designed as a segmented loading structure, and can be set to different preloading forces based on the internal deformation of the rock layer. The dynamic response testing scheme was designed, and the results indicate that the segmented loading anchor rod has a significant buffering effect on the response to impact load, and can provide reasonable tension feedback at different stages. Research has found that when the water cement ratio is 0.5-1.5, the curing efficiency and strength are both higher. In order to compare the seismic performance of composite support and traditional constant resistance anchor rod support, local blasting experiments were conducted. Based on a blasting vibration tester, a data detection and transmission system were designed to obtain the vibration speed of the tunnel roof during the vibration process. The research results show that composite support can reduce the maximum vibration by more than 40 %, stabilize the fragmentation coefficient at 1.38, and have a very significant vibration reduction effect.

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Section: Introductionmentioning

confidence: 99%

Seismic performance of soft rock tunnel under composite support conditions

Wu,

2024

J. vibroeng.

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“…In recent years, the seismic isolation technology is more widely used in residential buildings. The seismic performance is greatly improved compared with traditional seismic structures, especially high-rise residential buildings [2]. There are lots of researches on the seismic performance of building structures, but so far, most research concentrates on the causes of vibration [3], excavation of weak structures, and seismic performance tests through experiments and simulation analysis methods.…”

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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“…Studies on frameworks, applications, and policy interventions for multihazards have been widely developed so far on the global scale. Most of the existing literature incorporates multihazard risk assessment of infrastructures [19][20][21]; whereas, quite a few studies consider multihazard impacts on built environment on a societal scale [22][23][24]. The changing landscape of infrastructure construction and social vulnerability widely depends on the occurrence and consequences of multihazards.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Prospects of Transboundary Multihazard Dynamics: The Case of Bhotekoshi–Sunkoshi Watershed in Sino–Nepal Border Region

et al. 2021

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The impacts of multihazards have become more pronounced over the past few decades globally. Multiple hazards and their cascading impacts claim enormous losses of lives, livelihoods, and built environment. This paradigm prompts integrated and multidisciplinary perspectives to identify, characterize, and assess the occurrence of multihazards and subsequently design countermeasures considering impending multihazard scenarios at the local level. To this end, we considered one of the most egregious transboundary watersheds, which is regarded as a multihazard hotspot of Nepal, to analyze the underlying causes and cascade scenarios of multihazards, and their associated impacts. In this paper, geophysical, hydrometeorological, and socioeconomic perspectives are formulated to characterize the watershed from the dimension of susceptibility to multihazard occurrence. To characterize the complex dynamics of transboundary multihazard occurrence, insights have been presented from both the Nepali and the Chinese sides. Individual case studies and the interrelation matrix between various natural hazards are also presented so as to depict multihazard consequences in the transboundary region. The sum of the observations highlights that the watershed is highly vulnerable to a single as well as multiple natural hazards that often switch to disasters.

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Influence of Higher Modes of Vibration on the Seismic Response of Buildings with Linear and Nonlinear Viscous Dampers

Cited by 7 publications

References 15 publications

Seismic performance of soft rock tunnel under composite support conditions

Seismic performance of soft rock tunnel under composite support conditions

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

Assessing the Prospects of Transboundary Multihazard Dynamics: The Case of Bhotekoshi–Sunkoshi Watershed in Sino–Nepal Border Region

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