本文選題：獨柱式曲線連續(xù)箱梁　切入點：曲率半徑　出處：《河北工業(yè)大學(xué)》2015年碩士論文

【摘要】：在高速公路及城市立交匝道橋中,獨柱式曲線連續(xù)箱梁橋應(yīng)用廣泛,由于曲線梁橋的曲率影響,此種橋型在恒載、活載作用下,受力復(fù)雜,存在彎扭耦合作用,給設(shè)計及施工帶來了很大的困難。近年來,橋梁傾覆事故時有發(fā)生,造成了嚴(yán)重的經(jīng)濟(jì)損失和社會影響,因此對獨柱式曲線梁橋穩(wěn)定性的研究對其安全運(yùn)營及進(jìn)一步發(fā)展都具有很重要的意義。本文研究了獨柱式曲線梁橋的受力特性、穩(wěn)定性計算方法和影響因素,分析了曲線橋梁的常見病害及成因,曲線橋梁的計算理論以及計算方法,以某橋梁工程為背景,利用ANSYS有限元軟件,建立實體單元模型,分析了曲率半徑、支座預(yù)偏心和抗扭支座間距對曲線梁橋支座反力及內(nèi)力的影響。對比分析了鐵路規(guī)范、公路規(guī)范中關(guān)于橋梁穩(wěn)定性的規(guī)定,通過不同加載方式以最不利布載形式計算了某獨柱式橋梁的橫向抗傾覆穩(wěn)定性,并研究了曲率半徑及支座預(yù)偏心對橫向抗傾覆穩(wěn)定性的影響和變化規(guī)律。利用增加墩柱的方法對橋梁進(jìn)行橫向穩(wěn)定性加固,并對加固前、后支座反力及穩(wěn)定性進(jìn)行了對比分析,研究了新增支座的間距對支反力的影響,對曲線梁橋的穩(wěn)定性加固的設(shè)計及施工具有一定的實用價值。
[Abstract]:The single-column curved continuous box girder bridge is widely used in freeway and urban interchange ramp bridge. Due to the influence of curvature of curved girder bridge, this type of bridge is complicated under dead load and live load, and has the coupling effect of bending and torsion. In recent years, bridge overturning accidents have occurred from time to time, resulting in serious economic losses and social impacts. Therefore, the study on the stability of single-column curved girder bridge is of great significance for its safe operation and further development. This paper studies the mechanical characteristics, stability calculation method and influencing factors of single-column curved girder bridge. The common diseases and causes of curved bridges, the calculation theory and calculation method of curved bridges are analyzed. Based on the background of a bridge project, a solid element model is established by using ANSYS finite element software, and the radius of curvature is analyzed. The influence of bearing pre-eccentricity and anti-torsion support spacing on the reaction force and internal force of the support of curved girder bridge is compared and analyzed in the railway code and highway code about the stability of the bridge. The lateral overturning stability of a single column bridge is calculated by different loading methods in the most unfavorable distribution form. The influence of radius of curvature and pre-eccentricity of bearing on lateral anti-overturning stability is studied. The lateral stability of the bridge is strengthened by adding pier column, and the reaction force and stability of the rear support before reinforcement are compared and analyzed. The influence of the new support spacing on the supporting reaction force is studied, which is of practical value to the design and construction of the stability and reinforcement of the curved beam bridge.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U441;U448.21

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本文編號：1678677