本文選題：懸索橋 + 混凝土　； 參考：《山東大學》2015年碩士論文

【摘要】：蒙山天蒙景區(qū)人行索橋混凝土部分體積巨大,施工過程中由于混凝土澆筑引起的水化熱將對成橋質(zhì)量產(chǎn)生巨大影響,尤其是錨碇和索塔部分,因此設(shè)計及施工等方面都應(yīng)當格外重視溫度控制。本項目對天蒙人行索橋施工期溫度場、溫度應(yīng)力進行了模擬,制定了大體積混凝土澆筑方案,并根據(jù)工程實際有針對性的提出了防裂措施,保證了施工質(zhì)量。本文取得的主要成果如下：1、項目以熱量守恒原理為基礎(chǔ)推導混凝土導熱方程及混凝土瞬態(tài)溫度場方程,開展溫度場等效傳導方程擴展分析以滿足數(shù)值仿真需求�；诮Y(jié)構(gòu)特點設(shè)計分層、分段澆筑、通水冷卻等不同工況,通過數(shù)值模擬結(jié)果制定大體積混凝土澆筑方案。2、項目根據(jù)工程特點提出天蒙人行索橋大體積混凝土施工澆筑過程中溫度、應(yīng)力雙控原則。目前常用的傳統(tǒng)計算公式只指出溫度值與澆筑層厚度有關(guān),不能考慮分段對溫度場的影響,而項目計算結(jié)果更為準確、全面�，F(xiàn)行規(guī)范只對最大溫度變化值進行了控制,傳統(tǒng)公式計算也只能進行溫度計算。項目成果能夠同時對溫度場、應(yīng)力場進行分析,且從計算結(jié)果分析中可以看出大體積混凝土施工中對溫度應(yīng)力的控制更加關(guān)鍵。
[Abstract]:The concrete part of the pedestrian cable bridge in the Tianmeng scenic spot of Mengshan is huge in volume. The heat of hydration caused by concrete pouring in the construction process will have a great impact on the quality of the bridge, especially the Anchorage and the cable tower. Therefore, the design and construction should pay special attention to temperature control. This project simulates the temperature field and temperature stress during the construction period of Tianmen people's Bank Cable Bridge, formulates the pouring scheme of mass concrete, and puts forward the crack prevention measures according to the actual project, which ensures the construction quality. The main achievements of this paper are as follows: 1. Based on the principle of heat conservation, the heat conduction equation of concrete and the transient temperature field equation of concrete are derived, and the expansion analysis of equivalent conduction equation of temperature field is carried out to meet the needs of numerical simulation. Based on the structural characteristics of the design layered, piecewise pouring, water cooling and other different conditions, According to the characteristics of the project, the principle of double control of temperature and stress during the construction of mass concrete of Tianmeng cable bridge is put forward. At present, the traditional calculation formula only points out that the temperature value is related to the thickness of the pouring layer, and the effect of the subsection on the temperature field cannot be considered, but the result of the project is more accurate and comprehensive. The current code only controls the maximum temperature variation, and the traditional formula can only calculate the temperature. The results of the project can analyze the temperature field and the stress field at the same time, and from the analysis of the calculation results, we can see that the control of the temperature stress in the mass concrete construction is more critical.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U445.57

【參考文獻】

相關(guān)期刊論文 前4條

1 楊秋玲,馬可栓;大體積混凝土水化熱溫度場三維有限元分析[J];哈爾濱工業(yè)大學學報;2004年02期

2 劉莉;張生兵;;廈門后溪長途汽車站大體積混凝土施工[J];建筑技術(shù);2012年12期

3 張策;周倩;;水冷管對混凝土水化熱影響研究[J];黑龍江交通科技;2013年07期

4 吳宏;;季節(jié)性施工措施研究[J];建筑技術(shù);2014年03期

，

本文編號：1869616