钢管混凝土格构式风力发电机塔架可靠性分析-结构工程专业论文.docxVIP

内蒙古科技大学硕士学位论文 Mixed system model of the lattice type concrete filled steel tube wind turbine tower was established. The main failure path of tower is found by using the global branch - bound method. The results show that the main failure path is focused on the three layers at the bottom of the tower, there are no damage in tower leeward artifacts and cross diagonal, and the symmetric bar failure at the same time. The destruction of the tower begins from the compression oblique abdominal rod and terminates in the underlying tension pillar. It is found that focusing on the bottom tower column and oblique abdominal rod should be strengthened in future design and construction. The tower system reliability is 0.998 1 by PNET method. Then the reliability of tower is also analyzed with ANSYS program and Monte Carlo method, the calculation result of reliability between the two methods of calculation differ by 0.000 3, which indicate the result obtained by PNET method is correct. Key Words：Concrete filled steel tube; System reliability; Monte Carlo method IV -  PAGE 3 - 目 录 摘 要 II Abstract III  HYPERLINK \l _bookmark0 1 绪论 - 1 -  HYPERLINK \l _bookmark1 1.1 研究背景及意义 - 1 -  HYPERLINK \l _bookmark2 1.2 塔架结构的构造及受力特点 - 2 -  HYPERLINK \l _bookmark3 1.3 结构可靠性的概念 - 4 -  HYPERLINK \l _bookmark4 1.4 可靠性分析步骤 - 7 -  HYPERLINK \l _bookmark5 1.5 塔架体系可靠度的研究现状 - 7 -  HYPERLINK \l _bookmark6 1.5.1 国外研究现状 - 7 -  HYPERLINK \l _bookmark7 1.5.2 国内研究现状 - 8 -  HYPERLINK \l _bookmark8 1.6 本文主要工作 - 9 -  HYPERLINK \l _bookmark9 1.6.1 研究对象 - 9 -  HYPERLINK \l _bookmark10 1.6.2 研究内容 - 10 -  HYPERLINK \l _bookmark11 2 结构构件抗力及荷载的概率统计分析研究 - 12 -  HYPERLINK \l _bookmark12 2.1 结构构件抗力统计分析 - 12 -  HYPERLINK \l _bookmark13 2.1.1 结构构件抗力不确定性 - 12 -  HYPERLINK \l _bookmark14 2.1.2 结构构件抗力统计参数及其概率分布 - 13 -  HYPERLINK \l _bookmark15 2.2 结构荷载统计分析 - 19 -  HYPERLINK \l _bookmark16 2.2.1 塔架所受荷载 - 19 -  HYPERLINK \l _bookmark17 2.2.2 塔架所受荷载概率分布及其统计参数 - 2