Approximate method for temperature-dependent characteristics of structures with viscoelastic dampers

Lewandowski, Roman; Przychodzki, Maciej

doi:10.1007/s00419-018-1394-6

Cited by 15 publications

(24 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to equations ( 12) and ( 16), we can obtain s e ¼ α T s or ω e ¼ α T ω (Beheshti andAsadi, 2020, Lewandowski andPrzychodzki, 2018). Finally, equations ( 7) and ( 8) can be rewritten as (Dai et al, 2020;Gai et al, 2020)…”

Section: Time-temperature Correspondencementioning

confidence: 99%

“…These results showed that the peak structural responses, including displacement and acceleration, increase with ambient temperature (Beheshti and Asadi, 2020;Chang et al, 1992;Samali and Kwok, 1995). In general, there are three approaches to analyze the ambient temperature effect of VE materials and dampers: by using the thermal-mechanical model (Guo et al, 2016), empirical equation (Chang et al, 1992), and time-temperature correspondence (Beheshti andAsadi, 2020, Lewandowski andPrzychodzki, 2018;Moreira et al, 2010;Wei et al, 2017;Xu et al, 2020). The first is time-consuming when it is applied to a large-scale structure, the second greatly depends on the experimental data, and the third is a widely acceptable method in the polymer viscoelasticity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seismic performance of viscoelastically damped structures at different ambient temperatures

Dai

Gai

et al. 2020

Journal of Vibration and Control

View full text Add to dashboard Cite

Experimental results show that mechanical behaviors of viscoelastic dampers are greatly affected by ambient temperature. Neglecting the ambient temperature effect will lead to an inaccurate seismic evaluation on viscoelastically damped structures. This study investigates the ambient temperature effect on the seismic performance of viscoelastically damped structures. An efficient algorithm is proposed to solve the seismic response of viscoelastically damped structures at different ambient temperatures based on the time–temperature correspondence. Numerical simulations of a ten-story viscoelastically damped steel frame under historical earthquakes are presented to illustrate the ambient temperature effect on the seismic performance. The results show that the natural frequency decreases with the increase in ambient temperature, whereas the damping ratio change with ambient temperature greatly depends on the viscoelastic damper properties. The seismic displacement reduction, in general, decreases with the increase in ambient temperature. The seismic acceleration reduction with ambient temperature is affected by the viscoelastic damper properties, structural parameters, and earthquakes together.

show abstract

Section: Time-temperature Correspondencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic performance of viscoelastically damped structures at different ambient temperatures

Dai

Gai

et al. 2020

Journal of Vibration and Control

View full text Add to dashboard Cite

show abstract

“…In each story, we place one VE damper. Lewandowski (2016), Lewandowski andPawlak (2011), andLewandowski et al (2012) investigated the use of such a controller in different stories.…”

Section: A Four-story Buildingmentioning

confidence: 99%

“…The dynamic analysis of structural components with VE dampers has been the subject of many investigations (Escobedo and Ricles, 1998; Lewandowski, 2016; Lewandowski and Pawlak, 2011; Lewandowski et al, 2012; Singh et al, 2011). The dynamic analysis of a structural system with VE dampers in the state space form has been investigated in Tepljakov (2017) and Chang and Singh (2002).…”

Section: Introductionmentioning

confidence: 99%

Spline collocation methods for seismic analysis of multiple degree of freedom systems with visco-elastic dampers using fractional models

Khiabani

Ghaffarzadeh

Shiri

et al. 2020

Journal of Vibration and Control

View full text Add to dashboard Cite

The visco-elastic dampers can be economically designed for response reduction of dynamical systems. Recent developments in fractional calculus have affected the modeling of visco-elastic materials. The fractional models for visco-elastic dampers, which are parsimonious, require fewer parameters in comparison with other models. In this paper, we use the visco-elastic dampers for control of structural responses. The visco-elastic damper utilizes three important parameters including damping coefficient, stiffness, and fractional order. The dynamic model of the building with visco-elastic dampers can be acquired by a system of fractional differential equations, which includes both fractional and ordinary derivatives. We apply spline collocation methods for obtaining the numerical solution of this complex system. The collocation method is implemented in a graded mesh. The discrete data of earthquake are smoothed by spline interpolation of higher degree. The introduced method is used to simulate the response of a structure with active and passive controllers. A comparison of using different dampers is considered. Also, [Formula: see text] norm of the transform function is used for response analysis. The results of simulations for four-story and 10-story buildings show significant reductions in structural responses. Moreover, our analysis presents that the large variety of values can be used for parameters of the visco-elastic damper to provide flexibility in designing appropriate visco-elastic-dampers.

show abstract

“…In [39], the effect of temperature on the dynamic characteristics of beams with a VE layer was investigated experimentally. The authors found the first few non-dimensional damping ratios to decrease with temperature increasing from 5 to 40 • C. Some information concerning the influence of temperature on the dynamic characteristics of structures with VE dampers was presented very recently in the papers [13,41]. Very few papers were also dedicated to the analysis of the influence of temperature on structures with dampers or layers in the time domain.…”

Section: Influence Of Temperature On Dynamic Characteristics Of Strucmentioning

confidence: 99%

Analysis of dynamic characteristics of viscoelastic frame structures

Lewandowski

Wielentejczyk²

2019

Arch Appl Mech

Self Cite

View full text Add to dashboard Cite

Planar frame structures made of a viscoelastic material are considered in the paper. The technically very important structures made of a homogenous material are contemplated. A family of rheological models (classic and fractional) are used to describe the mechanical properties of the viscoelastic material. In particular, the dynamic characteristics of the structures are of interest. A numerically very efficient method is proposed to determine such characteristics. The method requires the solution to the linear eigenvalue problem for corresponding elastic structures and the solution to a nonlinear, algebraic equation. The presented method is much more efficient than other methods where, very often, the continuation method is used to solve the nonlinear eigenvalue problem. The influence of temperature changes on dynamic characteristics is analyzed using the frequency-temperature principle. The results of several parametric analyses are presented and discussed. For the first time, the influence of temperature on the dynamic characteristics of beams has been studied in detail. Keywords Viscoelastic frame structures • Free vibration • Dynamic characteristics • Ordinary and dynamic finite elements • Influences of temperature

show abstract

Approximate method for temperature-dependent characteristics of structures with viscoelastic dampers

Cited by 15 publications

References 24 publications

Seismic performance of viscoelastically damped structures at different ambient temperatures

Seismic performance of viscoelastically damped structures at different ambient temperatures

Spline collocation methods for seismic analysis of multiple degree of freedom systems with visco-elastic dampers using fractional models

Analysis of dynamic characteristics of viscoelastic frame structures

Contact Info

Product

Resources

About