相当的静态风载荷与高层建筑的数据库辅助设计:评估
Sejun Park1, Emil Simiu2, DongHun Yeo3
1NIST Director's Postdoctoral Research Associate, Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA.
概括
计算等效静电风载荷 (ESWL) 的新程序接近高层建筑的数据库辅助设计 (DAD) 结果. 对于ESWLs,使用十个时间点与DAD紧密相匹配,为结构设计提供了一个可行的替代方案.
科学领域:
- 结构工程 结构工程
- 风力工程是风力工程.
- 计算力学 计算力学 计算力学
背景情况:
- 数据库辅助设计 (DAD) 提供了一种准确且易于使用的方法来设计高层建筑物抵御风力负荷.
- 涉及代设计的传统方法可能是繁的,引发了对替代方法的兴趣,例如等效静电风载荷 (ESWLs).
研究的目的:
- 介绍和评估一种简单的ESWL计算程序,可以近似DAD.获得的结果.
- 评估基于ESWL的设计与DAD相比的准确性,特别是在需求与容量指数 (DCI) 方面.
主要方法:
- 使用有效的多重时间点 (MPIT) 方法计算ESWL的程序的开发.
- 在ESWL计算中严格和透明地计算风向.
- 一个案例研究,比较ESWL和DAD在高层建筑上的程序,使用DAD结果作为基准.
主要成果:
- 使用十个时间点 (60个风力负载情况) 计算的ESWL产生了DCI,比使用更少点 (例如,四个点,24个情况) 的DCI更接近DAD基准值.
- 对于所研究的建筑物,基于ESWL的DCI与大约3%的DAD产生的DCI相近.
- 对于单一不利风向主导的设计,ESWL的近似精度下降,并且通常不适合复杂的建筑形状.
结论:
- 拟议的ESWL程序为某些高层建筑设计提供了DAD结果的合理准确近似.
- 虽然ESWL可以是一个可行的替代方案,但DAD仍然是最安全和最符合风险的设计选择,特别是在复杂的结构或主要的风向方面.
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