本文選題：橡膠 + 碳纖維布　； 參考：《大連理工大學(xué)》2015年碩士論文

【摘要】：隨著社會(huì)的發(fā)展,道路、橋梁等關(guān)系國(guó)計(jì)民生的基礎(chǔ)工程在國(guó)家經(jīng)濟(jì)的發(fā)展過(guò)程中扮演的角色越來(lái)越重要。我國(guó)是地震頻發(fā)國(guó)家,地震在危及人民生命安全的同時(shí)也對(duì)道路橋梁等公共基礎(chǔ)設(shè)施造成極大破壞。據(jù)統(tǒng)計(jì),在地震來(lái)臨時(shí)所造成的財(cái)產(chǎn)損失中,僅道路橋梁的損失就要占到21.9%,同時(shí)由于道路橋梁的破壞導(dǎo)致影響到震區(qū)的抗震救災(zāi)工作,其間接損失更是無(wú)法估量。因此,如何提高橋梁結(jié)構(gòu)的抗震性能變得尤為重要,目前有很多學(xué)者都投入到了該方面的研究,也取得了很多有意義的成果。在進(jìn)行多孔連續(xù)梁橋的地震設(shè)計(jì)中,大多數(shù)時(shí)候是采用減隔震支座或是減隔震阻尼裝置來(lái)改變橋梁結(jié)構(gòu)的力學(xué)響應(yīng)特性并減小由此產(chǎn)生的慣性力作用。常用的減隔震支座目前主要有摩擦擺式減隔震支座、雙曲面球形減隔震支座、鉛芯隔震橡膠支座、鋼彈性阻尼減隔震支座、高阻尼隔震橡膠支座等；而減隔震裝置是指各類阻尼器,主要包括粘滯阻尼器、位移鎖定阻尼器、SMA類阻尼器等,但大多數(shù)阻尼器都是針對(duì)具體橋梁具體設(shè)計(jì)應(yīng)用的,沒(méi)有統(tǒng)一的分類標(biāo)準(zhǔn),而且大多數(shù)阻尼器都存在造價(jià)高、不便施工的問(wèn)題,所以在橋梁減隔震領(lǐng)域并沒(méi)有得到廣泛的應(yīng)用。本文通過(guò)對(duì)以上所述的減隔震裝置進(jìn)行分析、總結(jié)、創(chuàng)新,提出一種新型的橡膠圓柱與纖維布組合體的抗震擋塊。該擋塊主要由天然橡膠圓柱體與碳纖維布構(gòu)成,其組合方式是通過(guò)碳纖維粘結(jié)膠將碳纖維布纏繞在圓柱體側(cè)面形成共同受力體。文中通過(guò)理論推導(dǎo)、試驗(yàn)和數(shù)值分析來(lái)得出該擋塊的應(yīng)力-應(yīng)變曲線,了解該擋塊在靜、動(dòng)態(tài)作用下的力學(xué)響應(yīng)。文中還通過(guò)具體實(shí)例分析了多跨連續(xù)梁橋在安裝與不安裝該類抗震擋塊兩種工況下的地震響應(yīng)結(jié)果,對(duì)該擋塊的抗震機(jī)理和效果進(jìn)行了研究。論文的主要工作和成果如下：(1)對(duì)天然橡膠的本構(gòu)關(guān)系進(jìn)行了分析研究。通過(guò)對(duì)6組天然橡膠圓柱體進(jìn)行靜、動(dòng)力壓縮實(shí)驗(yàn)來(lái)分析其靜、動(dòng)力特性,得到靜力下純橡膠體的本構(gòu)模型以及其對(duì)應(yīng)的模型參數(shù),并且探討了各個(gè)模型的適用程度；同時(shí)研究了純橡膠體的粘彈性本構(gòu)模型并得到了與其對(duì)應(yīng)的模型參數(shù),分析了橡膠的粘彈性性質(zhì)對(duì)其動(dòng)力響應(yīng)的影響機(jī)理。(2)纖維布采用的是碳纖維布,是纏繞在橡膠圓柱體外側(cè)二者形成共同受力體,文中對(duì)該外纏碳纖維布的橡膠圓柱體力學(xué)性能進(jìn)行分析研究。通過(guò)理論分析,推導(dǎo)出在不同碳纖維布纏繞方式下該組合體的應(yīng)力-應(yīng)變關(guān)系式,同時(shí)運(yùn)用有限元數(shù)值模擬的方法對(duì)其靜、動(dòng)力特性進(jìn)行了分析,探討了碳纖維布的纏繞約束作用對(duì)橡膠體粘彈性的影響。(3)將該抗震擋塊應(yīng)用于實(shí)際橋梁工程中,采用時(shí)程分析的方法計(jì)算出采用和不采用該擋塊時(shí)連續(xù)梁橋的地震響應(yīng)結(jié)果,通過(guò)比較分析得出該擋塊的減隔震效果。
[Abstract]:With the development of society, roads, bridges and other basic projects related to the national economy and people's livelihood play a more and more important role in the process of national economic development. China is a country with frequent earthquakes. Earthquakes not only endanger people's lives, but also cause great damage to public infrastructure such as roads and bridges. According to statistics, in the property losses caused by the earthquake, only the loss of roads and bridges will account for 21.9. at the same time, the damage of roads and bridges will affect the earthquake relief work in the earthquake area, and its indirect losses are even more incalculable. Therefore, how to improve the seismic performance of bridge structure becomes more and more important. At present, many scholars have devoted themselves to the research and made a lot of meaningful achievements. In the seismic design of porous continuous beam bridge, most of the time, the isolation support or damping device is used to change the mechanical response characteristics of the bridge structure and reduce the inertial force. At present, there are mainly friction pendulum bearing, hyperboloid spherical bearing, lead core rubber bearing, steel elastic damping bearing, high damping rubber bearing and so on. Seismic isolation devices refer to all kinds of dampers, mainly including viscous dampers, displacement-locked dampers, SMA dampers, etc. But most of the dampers are designed and applied specifically for specific bridges, and there is no unified classification standard. Moreover, most dampers have the problems of high cost and inconvenient construction, so they are not widely used in the field of bridge isolation. Based on the analysis and innovation of the isolation device mentioned above, a new type of anti-seismic block of rubber cylinder and fiber cloth composite is proposed in this paper. The block is mainly composed of natural rubber cylinder and carbon fiber cloth. The combination way is that the carbon fiber cloth is wound around the cylinder side to form a common force body through carbon fiber adhesive. In this paper, the stress-strain curve of the block is obtained by theoretical derivation, experiment and numerical analysis, and the mechanical response of the block under static and dynamic action is understood. The seismic response results of multi-span continuous beam bridge under two working conditions of installing and not installing this kind of seismic block are also analyzed through concrete examples. The seismic mechanism and effect of the block are studied. The main work and results are as follows: 1) the constitutive relationship of natural rubber is studied. The static and dynamic characteristics of six groups of natural rubber cylinders were analyzed by static and dynamic compression experiments. The constitutive model of pure rubber under static force and its corresponding model parameters were obtained, and the applicability of each model was discussed. At the same time, the viscoelastic constitutive model of pure rubber was studied and the corresponding model parameters were obtained. The influence mechanism of viscoelastic properties of rubber on its dynamic response was analyzed. In this paper, the mechanical properties of the rubber cylinder wrapped with carbon fiber cloth are analyzed and studied. Through theoretical analysis, the stress-strain relationship of the composite under different CFRP winding modes is derived, and the static and dynamic characteristics of the composite are analyzed by means of finite element numerical simulation. In this paper, the influence of the winding restraint action of carbon fiber cloth on the viscoelasticity of rubber body is discussed. The seismic resistance block is applied to practical bridge engineering. The seismic response results of continuous beam bridge with and without the block are calculated by using time history analysis method. Through comparative analysis, the shock isolation effect of the block is obtained.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U442.55

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本文編號(hào)：1837662