• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Second-order inelastic and modified elastic analysis and design evaluation of planar steel frames.
【24h】

Second-order inelastic and modified elastic analysis and design evaluation of planar steel frames.

机译：平面钢框架的二阶非弹性和修正弹性分析与设计评估。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This research addresses two methods developed to simplify the design evaluation of steel framing systems, advanced analysis and the “modified elastic” approach. In the advanced analysis approach, the primary member limit states are modeled in the analysis to the extent that the corresponding design checks are superceded. In the modified elastic approach developed in this work, the phenomena that affect member strength and system interaction, specifically the effects of nominal initial frame nonverticality and inelasticity due to residual stresses, are modeled to the extent possible within an elastic analysis.; The proposed modified elastic approach is closely tied to the underlying physical behavior of the system. This method is based on the assertion that the best determination of system strength can be achieved by making an accurate estimate of the second-order inelastic forces in the members and other structural components, within the context of an elastic analysis, which can then be checked against simplified equations for the actual internal member resistances. The limit of the structural capacity is thereby established as the load level at which the limit state of the most critical member is reached. By providing a more accurate assessment of both system behavior and the distribution of forces within the system, both the modified elastic and advanced analysis methods eliminate the need for elastic buckling based solutions or the corresponding effective length factors required in the current AISC LRFD Specification for steel design.; The methods are extended to include the effects of connection behavior and the inelastic response of fully-composite beams. A nonlinear, fully-composite beam element is developed which accounts for the effects of construction loading on the section constitutive behavior. The element tracks the spread of yielding in the steel beam due to stresses present after the application of construction loads and the consequent effect on member behavior. In addition, a trilinear connection model is proposed for use with both the advanced analysis and modified elastic approaches. When used in conjunction with the modified elastic approach, a rational assessment of the effects of nonlinear connection response may be included within an elastic analysis-design method without the need to calculate either appropriate secant stiffness values or effective length factors.
机译：这项研究涉及为简化钢框架系统的设计评估而开发的两种方法，高级分析和“改进的弹性”方法。在高级分析方法中，主要成员极限状态在分析中建模为相应设计检查被取代的程度。在这项工作中开发的改进的弹性方法中，在弹性分析中尽可能建模了影响构件强度和系统相互作用的现象，特别是由于残余应力导致的名义初始框架非垂直性和非弹性的影响。所提出的改进的弹性方法与系统的基本物理行为紧密相关。该方法基于这样的主张，即可以在弹性分析的范围内，通过对构件和其他结构部件中的二阶非弹性力进行准确估计，来实现对系统强度的最佳确定。相对于实际内部构件电阻的简化方程式。由此将结构能力的极限确定为达到最关键构件的极限状态的载荷水平。通过提供对系统行为和系统内力分布的更准确评估，改进的弹性和高级分析方法都无需使用基于弹性屈曲的解决方案或现行AISC LRFD钢材规范中要求的相应有效长度因子设计。;这些方法被扩展为包括连接行为的影响和全复合梁的非弹性响应。一个非线性的，完全复合的梁单元被开发出来，它考虑了结构荷载对截面本构特性的影响。单元跟踪由于施加建筑荷载后出现的应力而导致的钢梁屈服的扩展及其对构件行为的影响。此外，提出了一种三线性连接模型，可用于高级分析和改进的弹性方法。当与修改的弹性方法结合使用时，可以在弹性分析设计方法中包括对非线性连接响应影响的合理评估，而无需计算适当的割线刚度值或有效长度因子。

著录项

  • 作者

    Maleck, Andrea Eden.;

  • 作者单位

    Georgia Institute of Technology.;

  • 授予单位 Georgia Institute of Technology.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2001
  • 页码 579 p.
  • 总页数 579
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号