超高层建筑的等效静风荷载-扩展荷载响应相关方法

Equivalent static wind loads on tall building—the extended load-response-correlation (ELRC) approach

基于同步多压力扫描系统(SM-PSS)的多点同步瞬态测压试验,采用完全二次型组合(CQC)方法计算复杂超高层建筑结构的风振响应,并采用时域积分方法进行验证,由此将复杂的动力学问题转换为简单的准静态问题,荷载响应相关(LRC)方法被扩展(ELRC)可用于计算包括共振响应在内的任意结构响应的等效静风荷载(ESW L)。文中采用432 m高的广州珠江新城西塔为例进行分析计算,结果显示:采用本方法得到的ESW L作用于结构可产生和采用CQC方法结果相一致的峰值位移响应,采用时程分析方法得到的顶部中心轨迹图显示计算结果的合理性和本文方法有效性,文中还对峰值因子和背景响应分量的计算方法进行了讨论。

The complete quadratic combination （CQC） approach is applied to analyze the wind-excited vibration problem of tall buildings based on the synchronous multi-pressure measurements on rigid building model using synchronous multi-pressure scanning system （SM-PSS）. By integrating the modal response into the construction of equivalent time-varying loads, the complex wind-induced dynamic problem is simplified to a quasi-static problem, and the load-response-correlation （LRC） approach is extended （ELRC） and applied to estimate the Equivalent Static Wind Load （ESWL） on structures with arbitrary dynamic response including the resonant response. As an example, the Guangzhou West Tower （GWT） with a height of 432 m is considered to illustrate the determination of the ESWLs and demonstrate its effectiveness in the design and analysis of tall buildings. The results show that the peak displacement responses determined by the ESWL approach are in excellent agreement with those from the CQC approach. The center track of the top floor calculated by the time domain integration method illustrates the rationality of the estimated ESWLs and the effectiveness of the proposed methodology. The calculation approaches for evaluation of gust factor and background response component are also discussed.