当前位置: X-MOL 学术Int. J. Steel Struct. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Optimizing the Design of Tall Buildings Using the Principle of Virtual Work: The Effect of Semi Rigid Connections
International Journal of Steel Structures ( IF 1.1 ) Pub Date : 2020-10-06 , DOI: 10.1007/s13296-020-00412-7
Alex Elvin , Johnnie Strydom

The Virtual Work Optimization Method (VWOM) is used to optimize tall buildings with semi rigid connections. The VWOM is an automated method that minimizes the mass of a structure with a given geometry, deflection criteria and load cases, while adhering to building code requirements. Members are selected from a user defined database to meet strength and stiffness criteria. The rotational stiffness of connections can be specified and varied, from rigid to pinned. The method is explained using an example of a two storey one bay steel frame with six members. Four case studies are presented: (i) a six storey two bay frame, (ii) a ten storey one bay steel building, (iii) a fifteen storey three bay steel frame and (iv) a twenty four storey three bay building. The examples are compared to results found in the literature. Structures were optimized for a range of connection rotational stiffnesses. The VWOM obtained results up to 44.6% lighter than published work. Optimized results showed that in most cases the semi rigid connection produced the same results as the rigid connections. This is due to the rapid plateauing of the optimized mass as the connection stiffness increases. Thus, the typical definition of semi rigid and rigid rotational stiffnesses (for example Eurocode 3) are both found on this plateau. If some members are lightly loaded, broad semi rigid and rigid bands can be produced. The effect in these cases is that structures with rigid connections are lighter than those with semi rigid connections as no compensation in the member stiffness is required to meet deflection criteria.



中文翻译:

使用虚拟工作原理优化高层建筑的设计:半刚性连接的影响

虚拟工作优化方法(VWOM)用于优化具有半刚性连接的高层建筑。VWOM是一种自动方法,可以在满足建筑规范要求的同时,将具有给定几何形状,挠度准则和荷载工况的结构的质量降至最低。从用户定义的数据库中选择成员,以满足强度和刚度标准。可以指定和更改连接的旋转刚度,从刚性到固定。以具有六个构件的两层一舱钢框架为例来说明该方法。提出了四个案例研究:(i)一栋六层高的两层海湾框架,(ii)一栋十层的一层海湾建筑,(iii)一栋十五层的三层海湾钢架,和(iv)一栋二十四层的三层海湾。将这些示例与文献中的结果进行比较。针对一系列连接旋转刚度对结构进行了优化。VWOM获得的结果比已发表的论文减轻了44.6%。优化结果表明,在大多数情况下,半刚性连接产生的结果与刚性连接相同。这是由于随着连接刚度的增加,优化质量的快速稳定。因此,在该平台上都可以找到半刚性和刚性旋转刚度的典型定义(例如,欧洲规范3)。如果某些构件轻载,则可以产生宽的半刚性和刚性带。在这些情况下,其效果是具有刚性连接的结构比具有半刚性连接的结构更轻,因为不需要为满足挠曲准则而对构件刚度进行补偿。比出版的作品轻6%。优化结果表明,在大多数情况下,半刚性连接产生的结果与刚性连接相同。这是由于随着连接刚度的增加,优化质量的快速稳定。因此,在该平台上都可以找到半刚性和刚性旋转刚度的典型定义(例如,欧洲规范3)。如果某些构件轻载,则可以产生宽的半刚性和刚性带。在这些情况下,其效果是具有刚性连接的结构比具有半刚性连接的结构更轻,因为不需要为满足挠曲准则而对构件刚度进行补偿。比出版的作品轻6%。优化结果表明,在大多数情况下,半刚性连接产生的结果与刚性连接相同。这是由于随着连接刚度的增加,优化质量的快速稳定。因此,在该平台上都可以找到半刚性和刚性旋转刚度的典型定义(例如,欧洲规范3)。如果某些构件轻载,则可以产生宽的半刚性和刚性带。在这些情况下,其效果是具有刚性连接的结构比具有半刚性连接的结构更轻,因为不需要为满足挠曲准则而对构件刚度进行补偿。这是由于随着连接刚度的增加,优化质量的快速稳定。因此,在该平台上都可以找到半刚性和刚性旋转刚度的典型定义(例如,欧洲规范3)。如果某些构件轻载,则可以产生宽的半刚性和刚性带。在这些情况下,其效果是具有刚性连接的结构比具有半刚性连接的结构更轻,因为不需要为满足挠曲准则而对构件刚度进行补偿。这是由于随着连接刚度的增加,优化质量的快速稳定。因此,在该平台上都可以找到半刚性和刚性旋转刚度的典型定义(例如,欧洲规范3)。如果某些构件轻载,则可以产生宽的半刚性和刚性带。在这些情况下,其效果是具有刚性连接的结构比具有半刚性连接的结构更轻,因为不需要为满足挠曲准则而对构件刚度进行补偿。

更新日期:2020-10-07
down
wechat
bug