呈纵横排列的群体高层建筑风荷载干扰研究

发布时间：2018-05-16 07:29

本文选题：高层建筑 + 纵横排列　；参考：《浙江大学》2013年硕士论文

【摘要】：高层住宅小区的建筑物通常按南北和东西方向呈现较规则的纵横排列形态。这类高层建筑的风荷载由于受上下游及侧边建筑的群体干扰影响,将呈现出与单体建筑或少数几幢相邻建筑显著不同的分布状况。鉴于目前这类呈纵横排列的纯高层建筑住宅小区越来越多,因此研究其中典型建筑的风荷载干扰效应,对同类建筑的围护结构和承重结构设计将具有十分重要的现实意义。本文以实际工程“钱江世纪城人才专用房一期工程”的群体高层建筑为模本,完成了呈纵横排列的群体高层建筑中典型塔楼在单、群体工况下的风洞刚性模型同步测压试验,并开展了以下几个方面的研究工作：(1)根据刚性模型风洞试验结果,分析了典型塔楼在不同风向角及单、群体工况下的局部风压系数均值和极值沿建筑高度和宽度的分布特性,总结了典型建筑表面局部风压的群体干扰规律；(2)分析了塔楼在单、群体工况下各测试层的风载合力及整体体型系数随风向角以及随高度的变化规律,研究了处建筑群不同平面位置的建筑物的风载合力所受的群体干扰影响；(3)分析了塔楼在单、群体工况下基底风载合力随风向角的变化特性,通过定义风干扰因子,并与规范方法、高频动态测力天平试验结果进行对比,研究了群体建筑中典型塔楼的基底合力的控制风向角及群体干扰效应。研究表明,处于建筑群不同部位的建筑物呈现不同的风荷载干扰效应。不同部位建筑物的局部正风压及中部建筑的局部负风压数值(绝对值)总体呈趋于减小的遮挡效应,且边角部建筑的效应小于中部建筑;但边角部建筑的局部负风压,尤其是极值负风压则会因局部狭道效应呈现绝对值增大的现象。中部建筑的楼层风荷载(或体型系数)、基底风荷载总体小于或接近于单体情况,但基底扭矩可能出现增大的现象;边角部建筑的相应风荷载在控制风向角及其附近风向角下会出现一定程度的增强效应。
[Abstract]:Buildings in a high-rise residential community are usually arranged in a relatively regular horizontal and horizontal arrangement in the direction of North and South and East and West. The wind load of this kind of high-rise building will be significantly different from that of a single building or a few adjacent buildings due to the influence of group interference from the upstream and downstream buildings. There are more and more residential buildings in pure high-rise buildings, so it is of great practical significance to study the wind load interference effect of typical buildings, which will be of great practical significance to the enclosure structure and the design of the bearing structure of the same kind of buildings.
In this paper, based on the actual project "Qianjiang Century City talent special room first phase project" as a model, the paper completed the wind tunnel rigid model synchronous pressure testing test of typical tower building under single and group working conditions, and carried out the following research work: (1) according to the rigid model wind tunnel. The results showed that the distribution characteristics of local wind pressure coefficient mean and extreme value along the building height and width under different wind direction angle and group condition were analyzed. The group interference law of local wind pressure of typical building surface was summarized. (2) analysis of the wind load and overall body shape system of the test layers under single and group conditions. The influence of group interference on the wind load of buildings with different plane position in the building group is studied with the variation of wind direction and height. (3) the variation characteristics of the wind direction angle of the base wind under the single and group conditions are analyzed, and the wind disturbance factor is defined and the dynamic force balance of the high frequency dynamic force is measured with the standard method. Based on the comparison of the test results, the wind direction and group interference effect of the base joint force of typical towers in the group buildings are studied.
The research shows that the buildings in different parts of the building exhibit different wind load interference effects. The local positive pressure of buildings in different parts and the local negative wind pressure value (absolute value) of the central building tend to decrease in general, and the effect of the side corner building is smaller than that of the central building; but the local negative wind pressure in the side corner is the local wind pressure, Especially, the extreme negative wind pressure will increase the absolute value of the local narrow channel effect. The floor wind load (or body coefficient) of the central building, the base wind load is less than or close to the single body condition, but the base torque may increase, and the corresponding wind load in the side corner building is controlled by the wind direction angle and the wind direction angle around it. There will be a certain degree of enhancement.

【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.213

【参考文献】