高层建筑中高耸结构风振控制等效设计

Equivalent design of wind induced vibration control for high-rise structures in high-rise buildings

在常规的风振控制等效设计中,我国现有技术标准对高层建筑中高耸结构的风振响应计算时仍然存在较大偏差,由于选择刚性结构搭建建筑框架,使得其结构会受到较高风载荷,从而导致风振受力过高等问题。为了准确计算高耸结构的风振响应,将结构脉动响应分为背景部分和共振部分的基础上,选择振动控制作为设计基础以确定其结构应力,通过阵风因子法和荷载组合法分析高耸结构的顺风向风振响应,在风振控制的荷载中实现了对风速的变化模拟。最后,再对高耸结构开展实例分析并对计算结果进行了比较,结果表明,文中研究的设计方法的特点和适用范围比传统控制方法的风振力等比减小15%~18%,具有较为突出的风振控制优势。

In the conventional equivalent design of wind vibration control,there is still a significant deviation in China’s existing technical standards for the wind vibration response of high-rise structures in high-rise buildings.Due to the selection of rigid structures to build building frames,their structures will be subjected to higher wind loads,leading to the problem of excessive wind vibration stress.In order to accurately calculate the wind-induced vibration response of high-rise structures,the structural pulsation response is divided into background and resonance parts.Based on this,vibration control is selected as the design basis to determine its structural stress.The gust factor method and load combination method are used to analyze the wind-induced vibration response of high-rise structures,the variation of wind speed is simulated in the load of wind-induced vibration control.Finally,an example analysis was conducted on high-rise structures and the calculation results were compared.The results showed that the characteristics and applicability of the design method studied in the article were reduced by 15%to 18%in proportion to the wind vibration force of traditional control methods,which has a prominent advantage in wind vibration control.