本文選題：鋼管混凝土拱橋 + 啞鈴型截面��； 參考：《長安大學(xué)》2015年碩士論文

【摘要】：本文以實(shí)橋工程為依托,對(duì)啞鈴型鋼管混凝土拱橋施工階段水化熱溫度場及溫度效應(yīng)展開研究。著重分析了水化熱溫度場與溫度效應(yīng)分布特征與時(shí)變規(guī)律,并結(jié)合鋼管混凝土灌注特點(diǎn),對(duì)啞鈴型鋼管混凝土拱橋灌注次序進(jìn)行優(yōu)化。最后對(duì)水化熱溫度場影響因素進(jìn)行分析,主要研究內(nèi)容如下:(1)基于熱傳導(dǎo)與熱力學(xué)有限元基本原理,分析應(yīng)用有限元程序進(jìn)行鋼管混凝土拱橋施工階段水化熱溫度場及溫度效應(yīng)計(jì)算基本流程,借鑒現(xiàn)有溫度場研究理論,明確溫度場分析基本假定。(2)根據(jù)水化熱溫度場有限元分析方法,具體討論溫度場有限元模型參數(shù)選取,并采用溫度實(shí)測數(shù)據(jù)驗(yàn)證溫度場分析方法與計(jì)算流程的可行性及準(zhǔn)確性。以實(shí)橋工程為依托,分析鋼管混凝土拱在混凝土水化放熱作用下溫度場與溫度效應(yīng)分布特點(diǎn)及變化規(guī)律。(3)針對(duì)啞鈴型鋼管混凝土拱橋的施工特點(diǎn),結(jié)合混凝土灌注施工階段水化放熱作用,分析混凝土不同灌注次序?qū)袄邞?yīng)力與變形的影響,形成啞鈴型鋼管混凝土拱橋灌注次序優(yōu)化方法,為實(shí)際工程施工提供參考。(4)以實(shí)橋有限元模型為基礎(chǔ),對(duì)鋼管混凝土拱水化熱溫度場影響因素進(jìn)行參數(shù)分析,對(duì)比分析不同參數(shù)對(duì)溫度場分布特點(diǎn)及變化規(guī)律的影響程度,為實(shí)際工程設(shè)計(jì)積累經(jīng)驗(yàn)。
[Abstract]:Based on the actual bridge project, the temperature field and temperature effect of the hydration heat in the construction stage of the dumbbell shaped concrete filled steel tube arch bridge are studied. The distribution characteristics and time variation of the thermal temperature field and temperature effect are emphatically analyzed, and the perfusion sequence of the dumbbell shaped concrete filled steel tube arch bridge is optimized in the light of the concrete filling characteristics of the concrete filled steel tube. The main research contents are as follows: (1) based on the basic principle of heat conduction and thermodynamics finite element, the basic flow of thermal temperature field and temperature effect in the construction stage of concrete filled steel tube arch bridge is analyzed and applied by finite element program, and the analysis foundation of temperature field is defined for reference by the existing temperature field theory. This assumption. (2) according to the finite element analysis method of the hydrothermal temperature field, the parameter selection of the finite element model of the temperature field is discussed. The feasibility and accuracy of the temperature field analysis method and the calculation process are verified by the measured temperature data. The temperature field and temperature of the concrete steel tube under the action of the concrete hydration and heat release are analyzed with the real bridge engineering. (3) according to the construction characteristics of the dumbbell shaped concrete filled steel tube arch bridge, combined with the hydration and exothermic effect of the concrete pouring construction stage, the influence of different concrete perfusion sequence on the stress and deformation of the arch ribs is analyzed, and the optimization method of the dumbbell type concrete filled steel tube arch bridge perfusion sequence is formed to provide the practical engineering construction. (4) based on the real bridge finite element model, the influence factors of the hydration heat temperature field of the concrete-filled steel tube arch are analyzed, and the influence degree of the different parameters on the temperature field distribution and the change law is compared and analyzed, so as to accumulate experience for the actual engineering design.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441;U448.22

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