本文選題：拱壩 + 溫控措施��； 參考：《西安理工大學》2017年碩士論文

【摘要】：拱壩是固結于基巖的空間殼體結構,具有超載能力強、工程量小等優(yōu)點,近年來隨著筑壩規(guī)模的增大得到了越來越廣泛的應用。溫度荷載是拱壩的一項主要荷載,溫度應力過大可能會導致拱壩產生裂縫,危及大壩結構安全。因此,對拱壩進行溫度場和溫度應力場仿真計算具有十分重要的意義。對于大體積混凝土來說,其溫控費用比重較大,對整個工程的投資都有一定的影響。對溫控總費用進行初步估算,具有一定的理論和實用價值。首先基于有限元通用軟件ANSYS,使用APDL語言編制西花拱壩溫控仿真計算程序,包括前處理、求解、后處理部分等。前處理部分創(chuàng)建有限元模型、定義參數(shù)和劃分網(wǎng)格。求解部分是利用ANSYS軟件對劃分好網(wǎng)格的整體計算模型進行有限元分析,同時建立平衡方程并求解得出計算結果。后處理部分就是對溫度場及溫度應力場計算結果進行處理,生成溫度及應力云圖,繪制溫度及應力歷時曲線。本文基于陜西省漢中市佛坪縣西花水庫樞紐工程,擬定了 3個溫控設計方案:方案1是自然入倉澆筑,不采取溫控措施;方案2是控制澆筑溫度小于等于18℃;方案3是控制澆筑溫度小于等于18℃并采取通水冷卻措施;然后分別對西花拱壩進行了溫度場及溫度應力場仿真計算。通過對比分析3個方案的溫度場及溫度應力場計算成果,最終推薦方案3為溫控設計方案。最終在推薦的溫控方案基礎之上,從材料制冷及通水冷卻兩個方面對溫控費用進行了初步估算。根據(jù)熱量平衡原理,針對不同的高溫月份選取合適的材料冷卻方式和通水冷卻參數(shù),結合工程概算定額和月混凝土澆筑強度計算得出了溫控措施總費用。研究成果為西花拱壩溫控措施的選擇及溫控費用控制提供了理論依據(jù),具有重要的實際應用價值。
[Abstract]:Arch dam is a kind of space shell structure consolidated in bedrock. It has many advantages such as strong overload capacity and small engineering quantity. In recent years, it has been applied more and more widely with the increase of dam scale. Temperature load is one of the main loads of arch dam. Excessive temperature stress may lead to cracks in arch dam and endanger the safety of dam structure. Therefore, it is of great significance to simulate the temperature field and thermal stress field of arch dam. For mass concrete, the proportion of temperature control cost is large, which has a certain impact on the investment of the whole project. The preliminary estimate of the total cost of temperature control has certain theoretical and practical value. Firstly, based on the finite element software ANSYSand APDL language, the temperature control simulation program of Xihua arch dam is compiled, including pre-processing, solution, post-processing and so on. The pre-processing part creates the finite element model, defines the parameters and meshes. In the solution part, the finite element analysis of the whole meshing model is carried out by using ANSYS software. At the same time, the equilibrium equation is established and the calculation results are obtained. The post-processing part is to process the temperature field and the calculation result of the temperature stress field, generate the temperature and stress cloud diagram, draw the curve of temperature and stress duration. Based on the Hub Project of Xihua Reservoir in Foping County, Hanzhong City, Shaanxi Province, three design schemes of temperature control are worked out in this paper: 1 is natural pouring, no temperature control measures are taken, 2 is to control pouring temperature less than or equal to 18 鈩，

本文編號：2113867