超高层建筑风致响应及等效静力风荷载研究  

Experimental and theoretical study on wind induced responses and effective static wind load on super-high-rise buildings

作　　者：李寿英[1] 陈政清[1] 

机构地区：[1]湖南大学风工程试验研究中心,湖南长沙410082

出　　处：《建筑结构学报》2010年第3期32-37,共6页Journal of Building Structures

基　　金：国家自然科学基金项目(50708035);中国博士后科学基金项目(20060400873)

摘　　要：以重庆宾馆为工程背景,制作了缩尺比为1∶300的试验模型,并进行了刚性模型同步测压风洞试验,采集了重庆宾馆建筑表面的脉动风压时程。风洞试验包括有周边建筑和无周边建筑两类工况。采用风洞试验的脉动风压时程数据,考虑该高层建筑2个主轴方向的前4阶弯曲模态,进行了其风致响应研究,得到了建筑顶部的位移响应和加速度响应,并进行了人体舒适度验算。采用惯性风荷载法,研究了建筑主轴方向的等效静力风荷载。结果表明:对于高度为300m的混凝土高层建筑,仅考虑1阶模态进行风致响应分析,位移响应能满足工程精度的要求,但加速度响应误差较大,至少应考虑前4阶模态;重庆宾馆10年重现期下建筑顶部的峰值加速度为0.144m/s2,满足舒适度限制要求;横风向平均风荷载较小,但惯性风荷载较大。Wind tunnel tests on a 1 ： 300 scale rigid model of the Chongqing Hotel were carried out in Boundary Layer Wind Tunnel of Hunan University to synchronously collect wind pressures. The study included two testing cases： with surrounding buildings and without surrounding buildings. Considering the 1 st to 4th sway modes, these collected wind pressure data was adopted to analyze wind induced responses of the prototype building, including deflections and accelerations, and occupancy comfort validation was discussed. Using GBJ 50019--2001 method, the effective static wind loads in each onhogonal direction were studied. Results show that it is not enough to analyze wind induced responses only considering the first mode, especially for acceleration. The peak acceleration at the building top of 10- year return period is 0. 144m/s2, satisfying occupancy comfort requirement. The mean wind load along cross-wind is small, however the inertial wind load along cross-wind is rather large.

关 键 词：超高层建筑 刚性模型测压 惯性风荷载法 风致响应 等效静力风荷载 

分 类 号：TU973.12[建筑科学—结构工程] TU317.1