东莞第一国际项目连体双塔高层建筑的风荷载

通过风洞试验研究了截面为切角曲边三角形的连体双塔高层建筑的风荷载特性,并作单塔试验比较。将风压沿截面进行积分求出沿坐标轴方向的合力,然后反算为沿坐标轴方向的整体体型系数。结果显示:风压沿高度变化不大,整体体型系数沿高度递减。单塔最大体型系数对应风向角比坐标轴偏15°。双塔连线方向(x向)体型系数上游塔略小于单塔情形,下游塔基本为零,y向的体型系数略小于单塔y向的,连体部分体型系数达2.2。根据规范和试验结果,提出了类似工程合理的取值建议。

Wind Pressure Distribution on Twin-tower Tall Building with Space Corridor of Dongguan 1st Intl' Project

A wind tunnel test has been carried out to investigate the wind pressure distribution on the surface of a twin-tower and top-corridor-connecting tall building with complex geometry plan,and a single-tower test is also performed for comparison.The total wind force of each test floor and the force coefficient are calculated by integrating the pressure along the plan circumference.According to test results,the wind pressure doesn't increase sharply along elevation,and the wind force coefficient decreases when the level increases.The maximum force coefficient of single tower occurs with 15 degrees deflection angle along the respective coordinate axis.For twin tower,the upstream tower force coefficient to x axis is slightly less than that of single tower of the same direction,and the downstream tower's of x direction is near to zero;the force coefficient to y axis is slightly less than that of single tower's to y direction,the coefficient of space corridor to y axis reaches 2.2.Based on load design code and test result,design value suggestion is raised for similar projects.