...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering Structures >Induction-heat treated steel braces with intentional eccentricity
【24h】

Induction-heat treated steel braces with intentional eccentricity

机译：感应热处理钢支架，具有故意偏心

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 paper presents a numerical and experimental study of a new steel brace design. The brace is a circular hollow structural section (HSS) of modified material properties by the induction heat (IH) treatment technology. The IH-treatment technology can increase the yielding stress of the steel to the desired value combining both the induction heating and quenching processes. In the proposed brace design, one-half of the section is treated by IH while the other one-half of the section maintains the original properties of conventional steel. The brace is designed with an intentional eccentricity along its length which inherently subjects the brace to bending moment in addition to axial forces. Based on the experimental data on steel braces with intentional eccentricity (BIE) and coupon tests of IH-treated steel, an accurate finite element model was created. A parametric study was conducted to evaluate the influence of major design parameters, such as the yielding stress ratio of IH-to-conventional steel, design configurations of brace-to-end plate connections and the bending direction with respect to the frame plane (i.e., out-of-plane and in-plane bending). Four IH-BIEs were tested quasi-statically under a standard cyclic loading protocol. Compared to the conventional design, IH-BIE provided up to a 60% lower elastic stiffness, reached a higher tension post-yielding stiffness equal to 20-30% of the elastic stiffness, while no strength deterioration was observed up to 2.0% story drift. The post-yielding stiffness depends on both eccentricity and IH-to-conventional yielding stress ratio, while fracture ductility can be further enhanced by special treatments at brace-to-end plate connections.
机译：本文介绍了一种新的钢支撑设计的数值和实验研究。支架是通过感应热（IH）处理技术的改性材料特性的圆形中空结构部分（HSS）。 IH处理技术可以将钢的屈服应力提高到结合感应加热和淬火过程的所需值。在拟议的支撑设计中，部分部分的一部分由IH处理，而另一部分的另一个部分保持常规钢的原始性质。括号设计具有沿其长度的有意的偏心率，其在轴向力之外固有地使支架进行弯曲力矩。基于具有有意偏心（BIE）和IH处理钢的钢筋的实验数据和IH处理钢的优惠券试验，采用精确的有限元模型。进行了参数研究以评估主要设计参数的影响，例如Ih - 常规钢的屈服应力比，设计配置的屈服应力比和弯曲方向相对于框架平面（即，平面外和面内弯曲）。在标准循环加载方案下测试四个IH-BIES静态。与传统的设计相比，IH-BIE提供了高达60％的弹性刚度，达到了较高的张力后，屈服刚度等于弹性刚度的20-30％，而没有观察到2.0％的故事漂移的强度劣化。发后刚度取决于偏心率和IH-与常规的屈服应力比，而在支架到端板连接处的特殊处理可以进一步增强裂缝延展性。

著录项

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