【摘要】：灌縫膠作為瀝青路面裂縫養(yǎng)護(hù)工作中的常用材料,多數(shù)會(huì)發(fā)生修補(bǔ)后的膠體粘結(jié)界面過(guò)早脫粘的現(xiàn)象,學(xué)術(shù)上稱之為粘附性失效。作為開裂養(yǎng)護(hù)后路面結(jié)構(gòu)中存在的功能性材料,人們?cè)趯?duì)灌縫膠效果進(jìn)行評(píng)估時(shí),往往注重膠體材料在實(shí)驗(yàn)室中粘附性、針入度、軟化點(diǎn)、高溫穩(wěn)定性等類似于瀝青材料的評(píng)價(jià)指標(biāo),鮮有文獻(xiàn)提及灌縫膠在路面結(jié)構(gòu)中的力學(xué)分析。然而,即使所有指標(biāo)都在允許范圍之內(nèi)的灌縫膠,在用于灌縫修補(bǔ)后,仍會(huì)存在失效過(guò)早的現(xiàn)象。這是由于灌縫膠在車輪荷載等條件共同作用下,膠體與路面結(jié)構(gòu)粘結(jié)界面達(dá)到了破壞出現(xiàn)的力學(xué)指標(biāo)。因此,對(duì)存在于路面系統(tǒng)中的灌縫膠界面進(jìn)行力學(xué)分析,以得到粘結(jié)界面在何種條件下最易出現(xiàn)損傷,對(duì)于今后用于養(yǎng)護(hù)工作的灌縫膠材料性能評(píng)價(jià)是極為必要的。首先,灌縫膠粘結(jié)界面是典型的內(nèi)聚力界面,在運(yùn)用有限元軟件對(duì)路面系統(tǒng)中的灌縫膠進(jìn)行力學(xué)分析時(shí),ABAQUS中界面單元需要選用合適的參數(shù)來(lái)表示。因此,通過(guò)灌縫膠的拉拔、剪切試驗(yàn)獲取內(nèi)聚力界面的張力位移曲線,將膠體粘結(jié)界面參數(shù)化處置。其次,為了更為真實(shí)的模擬路面系統(tǒng)中灌縫膠的工作狀態(tài),文章基于非均布移動(dòng)荷載作用下,考慮路面面層結(jié)構(gòu)材料和灌縫膠材料的粘彈特性,建立三維路面結(jié)構(gòu)模型。所以文章和對(duì)路面模型中的粘彈材料時(shí)溫參數(shù)進(jìn)行了擬合,并分析了灌縫膠界面在不同工況荷載作用情況下界面單元的力學(xué)響應(yīng)及損傷情況。再次,為了得到車輪荷載與環(huán)境溫度耦合作用下灌縫膠粘結(jié)界面的損傷結(jié)果,文章建立了含灌縫膠路面系統(tǒng)的溫度場(chǎng)模型,并針對(duì)灌縫膠材料與路面面層材料熱物性參數(shù)的區(qū)別進(jìn)行了測(cè)定,得到了含灌縫膠路面系統(tǒng)的溫度分布。灌縫膠與路面結(jié)構(gòu)之間的溫差也導(dǎo)致了界面之間溫度應(yīng)力的變化。最后,采用順序耦合的方法分析車輪荷載作用于最不利位置時(shí)與路面結(jié)構(gòu)內(nèi)部溫度應(yīng)力共同作用下的界面損傷程度。分析灌縫膠在耦合場(chǎng)作用下?lián)p傷出現(xiàn)的原因及今后路面養(yǎng)護(hù)時(shí)選取灌縫膠材料應(yīng)注意的事項(xiàng)。
[Abstract]:As a common material in the crack maintenance of asphalt pavement, the patched colloidal adhesive interface will be removed prematurely, which is called adhesion failure academically. As a functional material existing in pavement structure after cracking and curing, people often pay attention to the adhesion, penetration and softening point of colloidal material in laboratory when evaluating the effect of filling joint glue. The evaluation index of high temperature stability is similar to that of asphalt material, and few references have been made on the mechanical analysis of jointing glue in pavement structure. However, even if all the parameters are within the allowable range, there will still be premature invalidation after being used to repair the joint. This is because the bond interface between the glue and the pavement structure can reach the mechanical index of failure under the joint action of wheel load and so on. Therefore, it is very necessary to evaluate the properties of the jointing adhesive materials used in the maintenance work in the future by means of mechanical analysis of the joint filling interface in road surface system, in order to obtain the conditions under which the bond interface is most vulnerable to damage. First of all, the bonding interface is a typical cohesive interface. When the finite element software is used to analyze the mechanical properties of the seams in the pavement system, the interface elements in ABAQUS need to be represented by appropriate parameters. Therefore, the tension and displacement curves of cohesive interface were obtained by drawing and shearing tests, and the adhesive interface was parameterized. Secondly, in order to simulate the working state of jointing glue in pavement system more realistically, a three-dimensional pavement structure model is established based on the viscoelastic characteristics of pavement surface structure material and jointing glue material under the action of non-uniform moving load. In this paper, the time-temperature parameters of viscoelastic materials in pavement model are fitted, and the mechanical response and damage of interface elements under different load conditions are analyzed. Thirdly, in order to obtain the damage result of the bond interface of the filling joint under the coupling of wheel load and ambient temperature, the temperature field model of the pavement system with joint filling is established in this paper. The temperature distribution of the pavement system with joint filling glue is obtained by measuring the difference of the thermal physical properties between the filling glue material and the pavement surface material. The temperature difference between the joint filling glue and the pavement structure also leads to the change of the temperature stress between the interface. Finally, the sequential coupling method is used to analyze the damage degree of the interface under the action of the wheel load at the most unfavorable position and the internal thermal stress of the pavement structure. This paper analyzes the causes of damage caused by jointing glue under coupling field and the matters needing attention in selecting grouting glue material for pavement maintenance in the future.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U414;U418.6

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