Pounding Dynamic Responses of Sliding Base-Isolated Rectangular Liquid-Storage Structure considering Soil-Structure Interactions

Cheng, Xuansheng; Wei, Jing; Chen, Jia; Zhang, Xiaoyan

doi:10.1155/2017/8594051

Cited by 8 publications

(3 citation statements)

References 32 publications

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“…Mostly pounding elements with a linear or a nonlinear spring damper system, following the Hertz law, are applied (cf. [2,[25][26][27][28][29]). In this paper, a pounding element with a linear spring is chosen to describe the impact forces in both horizontal and vertical directions by interpolating the node tractions.…”

Section: Methods Of Contact Constraint Enforcementmentioning

confidence: 99%

A Structural Pounding Formulation Using Systematic Modal Truncation

Shi

Bamer

Markert

2018

Shock and Vibration

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The evaluation of the response function of the structural pounding problem is generally time-consuming if high-order systems are applied. The well-known modal truncation strategy is outstandingly efficient for a single linear ground-accelerated structure. However, for the analysis of the structural pounding problem, the classical modal truncation technique turns out to be ineffective as additional higher frequency motion due to possible contact impact occurs. This makes the determination of how many modes should be taken into account in order to obtain a required level of accuracy more difficult. Therefore, in this paper, a systematically controlled modal truncation strategy adapted to the seismic pounding formulation under consideration of high nonlinearity and nonsmoothness of contact problems is introduced. A comparative study of the classical and the controlled modal truncation technique is presented and a comparison with the commercial software package ABAQUS © is provided. It is shown that the computational accuracy is significantly improved when applying the new systematically controlled modal truncation strategy.

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Section: Methods Of Contact Constraint Enforcementmentioning

confidence: 99%

A Structural Pounding Formulation Using Systematic Modal Truncation

Shi

Bamer

Markert

2018

Shock and Vibration

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“…For more than four decades, a wide variety of studies have been conducted to develop various base isolation devices and to study their effects on the improvement of the seismic performance of steel tanks [8][9][10][11][12][13][14]. However, several factors influence the seismic responses of structures [15,16], and in the case of base-isolated liquid storage tanks, they may have adverse effects leading to an increase in seismic demands compared to the fixed base condition [17][18][19]. For example, Bagheri and Farajian [17] showed that the base isolation may experience an excessive displacement when the system is subjected to near-fault excitations with severe pulses, resulting in a dramatic increase in the displacement of the impulsive mass and, consequently, base shear and overturning moment.…”

Section: Introductionmentioning

confidence: 99%

Effect of MetaFoundation on the Seismic Responses of Liquid Storage Tanks

2022

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Cylindrical liquid storage tanks are vital lifeline structures, playing a critical role in industry and human life. Damages to these structures during previous earthquakes indicate their vulnerability against seismic events. A novel strategy to reduce the seismic demands in the structures is the use of metamaterials, being periodically placed in the foundation, called MetaFoundation (MF). The periodic configuration of metamaterials can create a stop band, leading to a decrease in wave propagation in the foundation. The aim of this paper is to study the effect of MF on the dynamic behaviour of liquid storage tanks. To that end, the governing equations of motion of the liquid storage tank equipped with MF are derived and solved in the time domain to obtain the time history of the responses under a set of ground motions. Then, the peak responses of tanks, mounted on MF, are compared with the corresponding responses in the fixed base condition. Besides, a parametric study is performed to assess the effect of the predominant frequency of earthquakes, the number of layers of metamaterials, the thickness of soft material, and the damping ratios of soft material on the performance of the MF. The obtained results indicate that the MF improves the dynamic behaviour of the squat tank, in which the mean ratio of responses using MF to the ones in the fixed base conditions equals 0.551 for impulsive displacement, overturning moment, and base shear.

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“…Shrimali et al and Dumne et al have researches on seismic response behavior of coupled buildings with base isolation and MR damper between adjacent floor levels [9,10]. Base isolated rectangular liquid-storage tank is investigated by Cheng et al to identify the pounding behavior due to near-field pulse-like earthquakes [11]. Gap dampers are also proposed to reduce displacement responses of base-isolated structures [12,13].…”

Section: Introductionmentioning

confidence: 99%

Effects of isolator properties on viscous damper capacity of base isolated adjacent buildings

Kandemir¹

2017

J. vibroeng.

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Base isolation technique requires clearance at the base level around the building. The exceedance of clearance during seismic motion leads to pounding with either the moat wall or adjacent building. This paper analyzes two base isolated adjacent buildings in terms of pounding and searches for optimum linear viscous damper capacity as pounding prevention measure. Changing dynamic characteristics of base isolation device has considerable effect on pounding behavior of adjacent buildings since the period of isolator bearing shifts the fundamental period of the superstructure. For multi-storey buildings, as the number of storey increases, the flexibility of isolated building becomes effective on dynamic behavior and the relative displacement between base and top floors increases. In related with this situation, viscous damper linkage for prevention of pounding may be considered as seismic mitigation solution for base isolated multi-storey buildings. The analyses to find out impact forces and damper capacities are carried out for varied isolator characteristics and storey numbers of buildings. The optimization procedure of linear viscous damper capacities for fixed-base adjacent buildings is modified for base isolated buildings.

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Pounding Dynamic Responses of Sliding Base-Isolated Rectangular Liquid-Storage Structure considering Soil-Structure Interactions

Cited by 8 publications

References 32 publications

A Structural Pounding Formulation Using Systematic Modal Truncation

A Structural Pounding Formulation Using Systematic Modal Truncation

Effect of MetaFoundation on the Seismic Responses of Liquid Storage Tanks

Effects of isolator properties on viscous damper capacity of base isolated adjacent buildings

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