Development and performance evaluation of an innovative low-cost seismic isolator

Tan, Ping; Xu, Kai; Wang, Bin; Chang, Chia‐Ming; Liu, Han; Zhou, Fulin

doi:10.1007/s11431-014-5662-6

Cited by 15 publications

(6 citation statements)

References 9 publications

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“…Fiber-reinforced plastic plate is usually employed as the reinforcement in the novel rectangular isolator, which is a common kind of engineering plastic and belongs to composite material. It was made up of unsaturated polyester matrix and glass fiber cloth in previous research [11].…”

Section: Fiber-reinforced Plastic Plate Isolatormentioning

confidence: 99%

“…us, equation 24is also tenable in the bending problem. Substituting equations (9), (24), and (44) in (11), the following equation is obtained:…”

Section: Equilibrium Equation Of Pressurementioning

confidence: 99%

“…Pauletta et al [10] observed an unstable roll-out deformation of which the force-displacement curves had negative slopes. As a promotion, Tan et al [11] proposed an innovative isolator which employed engineering plastics as reinforcement. Xu et al [12] conducted systematical experiments of the isolators, employing two different kinds of plastic material.…”

Section: Introductionmentioning

confidence: 99%

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Stiffness Analysis of Rectangular Isolators Reinforced by Engineering Plastics

Liu

Tan

Zhou

2019

Shock and Vibration

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A novel cost-effective isolator reinforced by engineering plastics has been designed and manufactured for seismic protection for low-rise buildings in less developed areas. The reinforcement is flexible in tension, which is similar to fiber-reinforced isolators. However, available solutions for fiber-reinforced isolators are not applicable, because the Poisson effect of engineering plastics cannot be neglected, which is done for fiber reinforcement. In this paper, analytical solutions for compression and bending stiffness for rectangular isolators reinforced by engineering plastics are proposed, with both the Poisson effect of the reinforcement and the effect of rubber compressibility taken into consideration. Then, the simplified solutions are also derived, which can greatly improve calculation efficiency. To validate the solutions, finite element analysis is conducted on a set of isolators with different reinforcement stiffnesses. The results show the superiority of the proposed solutions to the previous solutions for fiber-reinforced isolators. A series of experimental tests of the isolators are also carried out to verify the solutions. Both the analytical and the simplified solutions match well with the experimental results.

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Section: Fiber-reinforced Plastic Plate Isolatormentioning

confidence: 99%

“…us, equation 24is also tenable in the bending problem. Substituting equations (9), (24), and (44) in (11), the following equation is obtained:…”

Section: Equilibrium Equation Of Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stiffness Analysis of Rectangular Isolators Reinforced by Engineering Plastics

Liu

Tan

Zhou

2019

Shock and Vibration

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“…This form of Base Isolators (Bis) is big, weighty, and often costly. To overcome the problem, Tan et al [63] proposed a cost-effective and light isolator for low-rise building structures, made of plastic shims and unsaturated Fibre Reinforced Polyester (FRP) used between rubber layers.…”

Section: Pvc In Buildingsmentioning

confidence: 99%

Invited Review: Recent developments in vibration control of building and bridge structures

Ghaedi¹,

Ibrahim²,

Adeli³

et al. 2017

J. vibroeng.

106

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This paper presents a state-of-the-art review of recent articles published on active, passive, semi-active and hybrid vibration control systems for structures under dynamic loadings primarily since 2013. Active control systems include active mass dampers, active tuned mass dampers, distributed mass dampers, and active tendon control. Passive systems include tuned mass dampers (TMD), particle TMD, tuned liquid particle damper, tuned liquid column damper (TLCD), eddy-current TMD, tuned mass generator, tuned-inerter dampers, magnetic negative stiffness device, resetting passive stiffness damper, re-entering shape memory alloy damper, viscous wall dampers, viscoelastic dampers, and friction dampers. Semi-active systems include tuned liquid damper with floating roof, resettable variable stiffness TMD, variable friction dampers, semi-active TMD, magnetorheological dampers, leverage-type stiffness controllable mass damper, semi-active friction tendon. Hybrid systems include shape memory alloys-liquid column damper, shape memory alloy-based damper, and TMD-high damping rubber.

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“…The first approach was aimed to replace steel plates with fibre sheets [4]. In comparison with rigid reinforcements, flexible reinforcements are lighter and can be easily introduced in the manufacturing process of elastomeric rubber bearing to be installed under the structure in an unbonded configuration [5,6]. In fact, in masonry buildings, these devices are placed directly under the foundations of the structure, with no need for additional transfer elements, leading to a significant reduction of the construction costs [3].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Characterization of a Reclaimed Rubber Compound for Low-Cost Elastomeric Isolators

Cilento¹,

Losanno²,

Piga³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Although seismic isolation devices are effective in protecting structures during an earthquake, they are generally large, heavy, and expensive, making their application prohibitive for housing buildings. In the last few years, different strategies have been investigated to make seismic isolators cheaper and lighter for housing buildings in developing countries. Lower costs can be obtained at different scales: simplifying the installation process of devices, reducing energy consumption during manufacturing, and using recycled materials. Both weight and cost of isolators could be reduced by adopting flexible reinforcements in place of steel reinforcing plates, also allowing easier installation without bolted connections in unbounded configuration. Costs can be further reduced by replacing natural rubber with a recycled elastomer. It has been demonstrated that trying to give a second life to rubber is challenging, since devulcanization process, capable of breaking chemical bonds between rubber and sulphur, is highly polluting and requires high consumption of energy. In the present work, a recycled compound has been preliminary developed with mechanical properties not significantly lower than virgin rubber. Obtained parameters are satisfactory for use in unbounded isolators with flexible internal reinforcement where internal stresses are significantly reduced. In particular, a novel compound has been properly formulated in order to be lower cost in comparison to traditional one. Mechanical characterization of the material showed excellent properties including shear modulus and hardness similar to those of a soft rubber, even if a reduced ultimate deformation capacity is achieved. Furthermore, rubber adhesion with different fabrics has been investigated. Preliminary results are very promising and pave the way for the development of high-performance and low-cost rubber isolators.

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Development and performance evaluation of an innovative low-cost seismic isolator

Cited by 15 publications

References 9 publications

Stiffness Analysis of Rectangular Isolators Reinforced by Engineering Plastics

Stiffness Analysis of Rectangular Isolators Reinforced by Engineering Plastics

Invited Review: Recent developments in vibration control of building and bridge structures

Laboratory Characterization of a Reclaimed Rubber Compound for Low-Cost Elastomeric Isolators

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