壁式粘彈性阻尼器性能試驗研究
發(fā)布時間：2019-04-13 11:16
【摘要】：目前，結(jié)構(gòu)消能減震技術(shù)在土木工程中得到越來越多的應用，不同總類和不同形式的阻尼器被開發(fā)出來，用于結(jié)構(gòu)的減震控制。其中，壁式阻尼器是比較新的一種，具有易于安裝，便于布置的優(yōu)勢，有著廣泛的應用前景，但針對這種特殊形式的阻尼器的耗能特點，以及其設計方法的研究尚不充分。而阻尼器中的粘彈性阻尼器，隨著不同種類的粘彈性材料的開發(fā)，尤其是高阻尼橡膠的開發(fā)應用，粘彈性阻尼器的耗能能力得到提升，其力學性能呈現(xiàn)出新的特征，簡單實用準確的粘彈性阻尼器力學模型的開發(fā)，對于粘彈性阻尼器的應用與推廣有著重要意義。 針對上述問題，本文對一種高阻尼橡膠制成的粘彈性阻尼器進行了不同應變幅值、加載頻率和環(huán)境溫度下的基本力學性能試驗，老化性能試驗以及低周、高周疲勞性能試驗，研究試件在不同工況下的剪切存儲模量、剪切損失模量和損耗因子等力學參數(shù)，及其力學性能的變化規(guī)律。其中，對基本力學性能的考察包括100%-420%多個不同應變幅值；低周疲勞試驗最大應變達300%，充分研究了該阻尼器在大變形下的性能。試驗結(jié)果表明：該種阻尼器力學性能與加載頻率相關(guān)性較小，與溫度相關(guān)性相對明顯，隨應變幅值的增加阻尼器表現(xiàn)出軟化特征，但其損耗因子始終保持在比較高的水平。阻尼器在小位移和大位移下都有穩(wěn)定耗能能力，可使用于風振控制和地震響應控制。阻尼器表現(xiàn)出良好的變形能力，在200%大應變下仍能保持穩(wěn)定的力學性能，達到420%應變時仍未破壞。 基于上述試驗成果，針對粘彈性阻尼器在地震工程中應用面臨的大變形范圍，筆者提出了一種能夠考慮粘彈性阻尼器性能的應變幅值相關(guān)性，并且在一定程度上考慮阻尼器的速度相關(guān)性的Bilinear-Kelvin模型，模型模擬結(jié)果與試驗結(jié)果吻合較好。然后，采用筆者提出的阻尼器模型將粘彈性和軟鋼的壁式阻尼器分別附加到一框架中進行地震時程分析，以探究兩種阻尼器的減震效果。 針對壁式阻尼器這種形式，筆者對其在框架中的變形耗能特性，以及其對框架受力的影響進行理論分析，，提出了相關(guān)的簡化設計方法和建議，以便于考慮壁式阻尼器的位移放大效應及其對梁內(nèi)力的影響。
[Abstract]:At present, the structure energy dissipation technology has been more and more used in civil engineering. Different types and different types of dampers have been developed for structural seismic control. Among them, the wall damper is a new one, which has the advantages of easy installation and arrangement, and has a wide application prospect. However, the research on the energy dissipation characteristics of this special type damper and its design method is not enough. With the development of different kinds of viscoelastic materials, especially the development and application of high damping rubber, the energy dissipation capacity of Visco-elastic dampers has been improved, and the mechanical properties of Visco-elastic dampers show new characteristics. The development of a simple, practical and accurate mechanical model of viscoelastic dampers is of great significance for the application and popularization of viscoelastic dampers. In order to solve the above problems, a viscoelastic damper made of high damping rubber was tested under different strain amplitudes, loading frequencies and ambient temperatures, including basic mechanical properties, aging tests and low cycle and high cycle fatigue tests. The mechanical parameters, such as shear storage modulus, shear loss modulus and loss factor, and the variation rule of mechanical properties of the specimen under different working conditions are studied. The basic mechanical properties of the damper include more than 100% / 420% of different strain amplitudes, and the maximum strain of low cycle fatigue test is up to 300%. The performance of the damper under large deformation is fully studied. The experimental results show that the mechanical properties of the damper have little correlation with the loading frequency, while the temperature dependence is relatively obvious. With the increase of the strain amplitude, the damper shows softening characteristics, but its loss factor remains at a relatively high level all the time. The damper has stable energy dissipation capacity under small displacement and large displacement, and can be used for wind-induced vibration control and seismic response control. The damper has a good deformation ability and can maintain stable mechanical properties under 200% strain, and it is still undamaged when the strain reaches 420%. Based on the above experimental results and aiming at the large deformation range of viscoelastic dampers applied in seismic engineering, a strain amplitude correlation is proposed, which can take into account the performance of viscoelastic dampers. To some extent, the Bilinear-Kelvin model considering the velocity dependence of the damper, the simulation results are in good agreement with the experimental results. Then, the viscoelastic and soft steel wall dampers are appended to a frame for seismic time history analysis using the damper model proposed by the author to explore the damping effects of the two dampers. Based on the analysis of the energy dissipation characteristics of the wall damper in the frame and its influence on the force of the frame, some simplified design methods and suggestions are put forward, which can be used to analyze the energy dissipation characteristics of the frame and the influence of the damper on the force of the frame. In order to consider the displacement amplification effect of the wall damper and its influence on the internal force of the beam.
【學位授予單位】：清華大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU352.1
本文編號：2457504
[Abstract]:At present, the structure energy dissipation technology has been more and more used in civil engineering. Different types and different types of dampers have been developed for structural seismic control. Among them, the wall damper is a new one, which has the advantages of easy installation and arrangement, and has a wide application prospect. However, the research on the energy dissipation characteristics of this special type damper and its design method is not enough. With the development of different kinds of viscoelastic materials, especially the development and application of high damping rubber, the energy dissipation capacity of Visco-elastic dampers has been improved, and the mechanical properties of Visco-elastic dampers show new characteristics. The development of a simple, practical and accurate mechanical model of viscoelastic dampers is of great significance for the application and popularization of viscoelastic dampers. In order to solve the above problems, a viscoelastic damper made of high damping rubber was tested under different strain amplitudes, loading frequencies and ambient temperatures, including basic mechanical properties, aging tests and low cycle and high cycle fatigue tests. The mechanical parameters, such as shear storage modulus, shear loss modulus and loss factor, and the variation rule of mechanical properties of the specimen under different working conditions are studied. The basic mechanical properties of the damper include more than 100% / 420% of different strain amplitudes, and the maximum strain of low cycle fatigue test is up to 300%. The performance of the damper under large deformation is fully studied. The experimental results show that the mechanical properties of the damper have little correlation with the loading frequency, while the temperature dependence is relatively obvious. With the increase of the strain amplitude, the damper shows softening characteristics, but its loss factor remains at a relatively high level all the time. The damper has stable energy dissipation capacity under small displacement and large displacement, and can be used for wind-induced vibration control and seismic response control. The damper has a good deformation ability and can maintain stable mechanical properties under 200% strain, and it is still undamaged when the strain reaches 420%. Based on the above experimental results and aiming at the large deformation range of viscoelastic dampers applied in seismic engineering, a strain amplitude correlation is proposed, which can take into account the performance of viscoelastic dampers. To some extent, the Bilinear-Kelvin model considering the velocity dependence of the damper, the simulation results are in good agreement with the experimental results. Then, the viscoelastic and soft steel wall dampers are appended to a frame for seismic time history analysis using the damper model proposed by the author to explore the damping effects of the two dampers. Based on the analysis of the energy dissipation characteristics of the wall damper in the frame and its influence on the force of the frame, some simplified design methods and suggestions are put forward, which can be used to analyze the energy dissipation characteristics of the frame and the influence of the damper on the force of the frame. In order to consider the displacement amplification effect of the wall damper and its influence on the internal force of the beam.
【學位授予單位】：清華大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU352.1
【參考文獻】
相關(guān)期刊論文 前9條
1 吳波，郭安薪;粘彈性阻尼器的性能研究[J];地震工程與工程振動;1998年02期
2 常業(yè)軍,程文p<,隋杰英,梁曉峰;鋼筋混凝土框-剪結(jié)構(gòu)采用粘彈性阻尼器的減震設計[J];東南大學學報(自然科學版);2002年05期
3 歐謹;劉偉慶;章振濤;;粘滯阻尼墻動力性能試驗研究[J];工程抗震與加固改造;2005年06期
4 施煒;葉列平;陸新征;唐代遠;;不同抗震設防RC框架結(jié)構(gòu)抗倒塌能力的研究[J];工程力學;2011年03期
5 吳美良,錢稼茹;粘滯阻尼墻的研究與工程應用[J];工業(yè)建筑;2003年05期
6 隋杰英;程文p<;常業(yè)軍;唐春瑞;;粘彈性阻尼器耐久性試驗研究[J];工業(yè)建筑;2006年02期
7 程文p<,隋杰英,陳月明,李愛群,吳志敏,馮陳,趙建軍;宿遷市交通大廈采用粘彈性阻尼器的減震設計與研究[J];建筑結(jié)構(gòu)學報;2000年03期
8 譚在樹，錢稼茹;鋼筋混凝土框架用粘滯阻尼墻減震研究[J];建筑結(jié)構(gòu)學報;1998年02期
9 歐進萍,鄒向陽;粘彈性耗能器的性能試驗研究[J];振動與沖擊;1999年03期
本文編號：2457504
本文鏈接：http://sikaile.net/kejilunwen/sgjslw/2457504.html
