Development of elasto-plastic viscous damper finite element model for reinforced concrete frames

Hejazi, Farzad; Zabihi, Alireza; Jaafar, Mohd Saleh

doi:10.1016/j.soildyn.2014.06.008

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…Yielding metal dampers able to dissipate the incoming energy due to inelastic deformation of metals are also widely used in civil constructions [23,24]. Often, these elasto-plastic mechanisms consist in triangular or X-shaped mild steel plates, so that an almost uniform yielding throughout the device could be offered.…”

Section: Elasto-plastic Devices (Pl)mentioning

confidence: 99%

Passive Control Systems for the Blast Enhancement of Glazing Curtain Walls Under Explosive Loads

Bedon¹,

Amadio²

2017

TOCIEJ

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Glass curtain walls are used in modern buildings as envelopes for wide surfaces due to a multitude of aspects. In glass curtain walls, tensile brittle panels are connected -through mechanical or adhesive joints -with steel frameworks or aluminum bracing systems, and due to the interaction of several structural components, the behaviour of the so assembled system is complex to predict, especially under exceptional loading conditions such as explosive events. In the paper, glazing curtain walls are investigated by means of Finite-Element (FE) numerical simulations, under the effect of air blast pressures of variable intensity. Their typical dynamic behaviour and criticalities under high-strain impact loads are first analyzed. By means of extended nonlinear dynamic FE parametric studies, innovative devices are applied to traditional curtain walls, at their support points, in order to improve their expected dynamic response. Two possible solutions, namely consisting of viscoelastic (VE) or elasto-plastic (PL) dampers, are proposed as passive control systems for the mitigation of maximum effects in the façade components deriving from the incoming blast pressures. As shown, although characterized by specific intrinsic mechanical behaviours, either VE or PL dampers can offer beneficial structural effects. In the first case, major advantages for the façade components derive from the additional flexibility and damping capacities of VE devices. In the latter case, PL dampers introduce additional plastic energy dissipation in the traditional curtain wall assembly, hence allowing preventing severe damage in the glazing components. It is thus expected that the current outcomes could represent a valid background for further experimental validation as well as detailed assessment and optimization of the proposed design concept.

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Section: Elasto-plastic Devices (Pl)mentioning

confidence: 99%

Passive Control Systems for the Blast Enhancement of Glazing Curtain Walls Under Explosive Loads

Bedon¹,

Amadio²

2017

TOCIEJ

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“…In 2014 Hejazi et al [17] have proposed the elastic damper in the center part and two plastic hinges at both the ends of the component which are upright with the constitutive model to fortify concrete structures and was fit to identify failure and harm in viscous damper gadget associations amid earthquake excitation. The limited component model comprises of strengthened concrete edge component and viscous damper component was created and unique finite element algorithm employing Newmark's abrupt regulated combination was produced for in elastic element examination of structure with supplementary elastic plastic thick damper component.…”

Section: Literature Reviewmentioning

confidence: 99%

Fluid flow modeling and experimental investigation on automobile damper

Jugulkar

Singh

Sawant

2016

Construction and Building Materials

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“…They designed complex orifices in the piston and improved energy dissipation in the dampers. Hejazi et al. (2014) presented a new three-dimensional elasto-plastic viscous damper.…”

Section: Introductionmentioning

confidence: 99%

Innovative adaptive viscous damper to improve seismic control of structures

Hormozabad

Zahrai

2019

Journal of Vibration and Control

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In this paper, a new adaptive viscous damper (AVD) is proposed and required equations are developed to describe its mechanical behavior. As opposed to conventional adaptive devices, the proposed damper is capable of adapting its own mechanical properties without any need for other devices such as sensors, processing unit, actuators, energy supplies, and wired or wireless connections. Eliminating such equipment not only reduces costs, but also removes related time lag and improves the efficiency of the control system. The proposed AVD includes a cylinder filled with viscous fluid and a piston with a nozzle at its head. The passing area of the nozzle is variable and as a result, the device can cover a range of damping coefficients. For non-extreme excitations, the damping coefficient is relatively small and consequently the damping force is reduced. Conversely, when extreme movements occur, the nozzle contracts a bit and generates relatively large control forces in order to protect the main structure efficiently. The mechanical model of the AVD is created in OpenSees and the damper is implemented in a two-story building example subjected to different earthquake records. The results show that compared to a typical viscous device, the proposed AVD can reduce the mean values of displacement, acceleration, and base shear by up to 52.5, 62.9, and 44.4% and increase the energy dissipation by up to 94.3% for extreme cases. Moreover, for non-extreme cases, the AVD shows a more flexible behavior and reduces the unfavorable damping forces.

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Development of elasto-plastic viscous damper finite element model for reinforced concrete frames

Cited by 18 publications

References 20 publications

Passive Control Systems for the Blast Enhancement of Glazing Curtain Walls Under Explosive Loads

Passive Control Systems for the Blast Enhancement of Glazing Curtain Walls Under Explosive Loads

Fluid flow modeling and experimental investigation on automobile damper

Innovative adaptive viscous damper to improve seismic control of structures

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