﻿ 模拟施工过程的拱坝结构应力分析 Stress Analysis of a High Arch Dam Considering Construct Step

Hans Journal of Civil Engineering
Vol.07 No.01(2018), Article ID:23504,11 pages
10.12677/HJCE.2018.71006

Stress Analysis of a High Arch Dam Considering Construct Step

Wanying Jiang

Nanjing R & D Tech Group Co., Ltd., Nanjing Hydraulic Research Institute, Nanjing Jiangsu

Received: Jan. 3rd, 2018; accepted: Jan. 17th, 2018; published: Jan. 24th, 2018

ABSTRACT

The stress and deformation of a high arch dam are calculated under the self-weight, water pressure and temperature load by linear and nonlinear finite element method. The self-weight is applied according to three ways: bearing by whole dam, bearing by beam and bearing step by step. The equivalent stress on dam-foundation interface and plastic strain, and the plastic energy of the arch dam are used to evaluate the influence of self-weight loading ways. The results of finite element method show that self-weight loading ways greatly affect the stress distribution, plastic strain and plastic energy of the arch dam. Thus, the dam construction steps must be considered and the actual stress status of dam can be used to judge the safety of dam.

1. 引言

2. 计算模型

2.1. 工程概况

2.2. 材料参数及模型

2.3. 计算荷载

Table 1. Materials parameter

Table 2. Crown filling temperate and temperature change under normal water level

2.4. 计算模型

3. 线弹性计算结果——重力施加方式对坝体应力的影响

3.1. 计算方案

Figure 1. Mesh of total model

Figure 2. Mesh of transverse joints

3.2. 自重应力计算结果

3.3. 正常工况的计算结果

Table 3. Maximum equivalent principal stress in dam-foundation interface

Figure 3. Program 1: Maximum principal stress of dam/Pa

Figure 4. Program 1: Minimum principal stress of dam/Pa

Figure 5. Program 2: Maximum principal stress of dam/Pa

Figure 6. Program 2: Minimum principal stress of dam/Pa

Figure 7. Program 3: Maximum principal stress of dam/Pa

Figure 8. Program 3: Minimum principal stress of dam/Pa

Table 4. Maximum equivalent principal stress in dam-foundation interface under normal water level and temperature drop

Table 5. Maximum equivalent principal stress in dam foundation interface under normal water level and temperature rise

4. 非线性有限元计算结果

Table 6. Maximum equivalent plastic strain and energy and principal stress of dam

Figure 9. Program 1: Equivalent plastic strain of dam under normal water level and temperature drop

Figure 10. Program 2: Equivalent plastic strain of dam under normal water level and temperature drop

Figure 11. Program 3: Equivalent plastic strain of dam under normal water level and temperature drop

5. 结语

Stress Analysis of a High Arch Dam Considering Construct Step[J]. 土木工程, 2018, 07(01): 37-47. http://dx.doi.org/10.12677/HJCE.2018.71006

1. 1. 中国水利水电出版社. 拱坝设计规范[M]. 北京: 中国水利水电出版社, 2006: 26-27.

2. 2. 朱伯芳. 拱坝设计与研究[M]. 北京: 中国水利水电出版社, 2002: 133-144.

3. 3. 朱伯芳. 有限单元法原理与应用[M]. 北京: 中国水利电力出版社, 1998: 182-186.

4. 4. 冯道雨. 长沙坝水库大坝加固方案有限元分析及安全评价[J]. 武汉大学学报, 2004, 37(5): 50-53.

5. 5. 韩晓凤, 张伟. 考虑封拱灌浆过程的高拱坝施工期仿真分析[J]. 水力发电, 2005, 31(8): 38-41.

6. 6. 葛劭卿, 张国新, 喻建清. 自重与初次蓄水对特高拱坝应力的影响[J]. 水力发电, 2006, 32(9): 25-27.

7. 7. 刘心庭, 黄达海, 王从锋. 沙老河拱坝施工过程仿真分析[J]. 人民长江, 2007, 38(6): 90-92.

8. 8. 赵小莲, 张仲卿. 水平层缝和横缝对锦屏高拱坝结构响应的研究[J]. 人民长江, 2008, 39(5): 40-42.

9. 9. 王旭, 赖国伟, 王志鹏. “另类单元生死”在大坝等结构施工仿真中的应用[J]. 水力发电, 2012, 38(1): 37-40.

10. 10. 杨志刚, 陈为民, 张冬, 万小庆. 自重施加模拟方式对高拱坝工作性能的影响[J]. 广西大学学报, 2012, 37(4): 820-825.

11. 11. 甘海阔, 赖国伟, 李业盛. 基于三维有限差分法的小湾拱坝施工步模拟及极限承载分析[J]. 岩石力学与工程学报, 2013, 32(2): 3918-3927.

12. 12. 王海娟, 辛全才, 马红娜. 不同自重施加方式对拱坝施工期应力的影响[J]. 人民长江, 2009, 40(20): 32-34.

13. 13. 傅作新, 钱向东. 有限单元法在拱坝设计中的应用[J]. 河海大学学报, 1991, 19(2): 8-15.