本文選題：波紋鋼腹板箱梁　切入點(diǎn)：有限元法　出處：《長(zhǎng)安大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：波紋鋼腹板箱梁是用波紋鋼腹板取代原先的混凝土腹板而成的一種有較好前景的新型橋梁。這種箱梁主要由上、下翼板承擔(dān)彎矩,波紋鋼腹板承擔(dān)剪力。本文結(jié)合前人對(duì)箱梁剪力滯效應(yīng)和腹板剪力分配的研究成果,依據(jù)單箱三室箱梁對(duì)稱荷載的兩種不同加載模式(邊腹板加載模式、中腹板加載模式),通過(guò)試驗(yàn)研究和有限元分析,對(duì)單箱三室波紋鋼腹板箱梁翼緣板剪力滯效應(yīng)及其腹板剪力分配規(guī)律進(jìn)行研究,有助于深入了解該類結(jié)構(gòu)的受力特點(diǎn)以便進(jìn)一步推廣。本文受國(guó)家自然科學(xué)基金資助項(xiàng)目(51308053)資助,主要完成了以下工作:(1)進(jìn)行單箱三室波紋鋼腹板預(yù)應(yīng)力混凝土箱梁靜力試驗(yàn)研究,將試驗(yàn)結(jié)果與有限元結(jié)果進(jìn)行對(duì)比分析,驗(yàn)證有限元模型的正確性。(2)單箱三室箱梁腹板對(duì)稱加載荷載模式有三種,為四個(gè)腹板加載模式,邊腹板加載模式和中腹板加載模式。本文分析三種加載模式下箱梁剪力滯效應(yīng)之間的關(guān)系,并依據(jù)后兩種模式確定有限元模型的荷載工況,分析箱梁不同截面剪力滯效應(yīng)的特點(diǎn)。(3)研究了寬跨比、中隔板的有無(wú)、各箱室寬度比等構(gòu)造參數(shù)對(duì)剪力滯效應(yīng)的影響程度。給出不同加載模式下以寬跨比為變量的跨中截面上、下翼緣板最大剪力滯系數(shù)計(jì)算公式,并確定了相應(yīng)的有效分布寬度比的計(jì)算公式。(4)對(duì)稱荷載作用下,單箱三室波紋鋼腹板箱梁邊腹板和中腹板承擔(dān)的剪力大小并不相同,將依據(jù)箱梁自身具有的腹板剪力分配規(guī)律進(jìn)行分配。本文研究?jī)煞N加載模式下單箱三室波紋鋼腹板箱梁的剪力分配特點(diǎn),并得出了以中隔板有無(wú)、腹板間距、腹板厚度、支座條件等為變參數(shù)的腹板剪力分配系數(shù),為工程應(yīng)用提供參考。
[Abstract]:Corrugated steel web box girder is a new type of bridge with corrugated steel web instead of concrete web. Corrugated steel webs bear shear force. Based on the previous researches on shear lag effect of box girder and distribution of web shear force, according to two different loading modes (side web loading mode) of single box and three compartment box girder, Through experimental study and finite element analysis, the shear lag effect of flange plate of single box three-compartment corrugated steel web box girder and its web shear distribution are studied. This paper is supported by the National Natural Science Foundation of China (project No. 51308053). The main work is as follows: (1) the static test of prestressed concrete box girder with corrugated steel webs with single box and three rooms is carried out, and the test results are compared with the results of finite element analysis. To verify the correctness of the finite element model. (2) there are three symmetrical loading modes for webs of single box and three chambers box girders, which are four web loading modes. In this paper, the relationship between shear lag effect of box girder under three loading modes is analyzed, and the load conditions of finite element model are determined according to the latter two modes. The characteristics of shear lag effect in different sections of box girder are analyzed. (3) the influence degree of structural parameters such as width span ratio, the existence of middle spacer and the ratio of box width to chamber width on the shear lag effect is studied. At the same time, the span section with the ratio of width to span as variable under different loading modes is given. The formula for calculating the maximum shear lag coefficient of the lower flange plate is given, and the corresponding formula for calculating the effective distribution width ratio is determined. Under the action of symmetric load, the shear strength of the side web and the middle web of the corrugated steel box girder with single box and three compartment corrugated steel webs are not the same. According to the distribution law of web shear force in box girder itself, this paper studies the shear distribution characteristics of three compartment corrugated steel web box girder with two loading modes, and obtains the characteristics of shear distribution of box girder with three compartments of corrugated steel webs, and obtains whether there is a middle partition plate, the spacing of web plates, and the thickness of web plates. The support condition is the coefficient of web shear distribution with variable parameters, which provides a reference for engineering application.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441;U448.213

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本文編號(hào)：1621587