【作者】 李先明；

【导师】 秦忠国；

【作者基本信息】 河海大学 ， 结构工程， 2006， 硕士

【摘要】 本文在系统总结前人研究成果的基础上，针对平原地区水工结构温度裂缝出现的特点和共性，开展了水工混凝土的温度场和温度应力场仿真系统的研究，包含以下内容： 1、总结水工建筑物施工期开裂的机理和温度应力计算原理及方法，针对面广量大的中小型水工建筑物开裂问题，提出水工建筑物温度应力分析仿真系统的应用框架。 2、剖析了ABAQUS的系统结构，在此基础上开发了基于Python语言的多个操作模块，通过ABAQUS内建的布尔运算功能，实现了复杂模型自动形成、边界条件自动施加、模型表面和节点自动选择等多项自动化功能。这些模块的开发增加了ABAQUS的建模功能。 3、开发ABAQUS的FORTRAN语言接口，解决了混凝土材料生热率随时间变化、弹性模量随时间增长、散热系数随高度变化等系数与ABAQUS的连接问题。 4、开发了环境温度自动生成模块，自动形成施工期内大气温度的变化曲线，可以方便地考虑寒潮影响。 5、定义了包括水泥水化热曲线、弹模增长曲线、地基参数、混凝土比热、导热参数等因素在内的主控数据结构，并设计相应的用户输出界面。 6、目前的ABAQUS／CAE界面尚缺乏生死单元控制功能，本系统通过自动形成底层的INP文件的加载数据模块，解决了建筑物施工期分期浇筑的自动模拟。 7、对本文研究的水工建筑物温度应力仿真系统，结合南京三汊河水闸工程进行了试运行，得到了较为合理的计算结果，证明采用本系统可以较大缩短温控研究周期。更多还原

【Abstract】 Base on studying and analyzing the experts’ fruits systematically, according to the features and commons of cracks in hydraulic concrete, my treatise design a simulation system in thermal stress and temperature field analysis of the hydraulic building in plain .The main contents are as follows:1 、 Summarize the theory and methods in thermal stress analysis, in the light of the problems of cracks in hydraulic buildings spreading all over the plain, put forward a simulator frame in thermal stress analysis of hydraulic buildings.2、 Dissect the ABAQUS architecture, and set up a poly-operation model which bases on Python language. By means of the ABAQUS kernel functions, bring out auto-setting up complex models, auto-loading boundary conditions, auto-selecting codes and surfaces of the models, and such automation functions. This modules reinforce the model-building functions of ABAQUS radically.3 、 Develop the ABAQUS interface with FORTRAN, resolve the relating problems such as heat yielding rate changing follows to the time changing, young’s modulus changing follows to the time adding and etc to ABAQUS.4 、 Develop surrounding temperature auto-forming module, auto-form the curve of atmosphere temperature changing in construction period, and can consider cold current conveniently.5、 Design the major operating data architecture, which includes the factors such as heat releasing curve、 young’s modulus raising curve、 foundation parameter、 heat conduction parameter and so on. Design user’s output windows.6、 The current ABAQUS/CAE have not living and dead elements operating function. Through auto-setting up loading data modules in the basic INP files, it can auto-simulates building structures by stages in construction period.7、 Use the system to calculate the pier concrete thermal stress on SanCha River in Nanjing, and have reasonable results, which prove this system can increase working efficiency extremely.更多还原