CAJ | 학술논문

为研究建筑群体效应对超高层建筑风荷载及风力发电能力的影响，对某250 m高大底盘、双塔体型不规则超高层建筑进行了缩尺模型风洞试验研究，通过风气候分析计算了建筑场地1年、5年和10年的低重现期风速及排除台风影响的设计风剖面，分别考虑了当前周边建筑群体和未来周边建筑群体两种群体效应工况，根据试验结果计算了该结构考虑群体效应的基底等效风荷载反力、各立面风压分布和风机发电效率。结果表明，建筑外形不规则的双塔对气流有明显的改变且作用效果不同于常规矩形超高层建筑，配合楼层平面尺寸逐层缩小，有效缓和了竖向风荷载在建筑高度上的分布。受群体效应影响，在当前和未来周边建筑群两种工况下，双塔两个主轴方向基底等效风荷载结果变化明显；裙房高度风压分布变化尤为显著，给该处风机取风口的设置造成困难；塔楼竖向风压分布发生改变，影响了风机发电效率。因此设计时须考虑群体效应影响，合理选择风机取风口位置以避免周边建筑群体改变对风力发电的不利影响。
위연구건축군체효응대초고층건축풍하재급풍력발전능력적영향，대모250 m고대저반、쌍탑체형불규칙초고층건축진행료축척모형풍동시험연구，통과풍기후분석계산료건축장지1년、5년화10년적저중현기풍속급배제태풍영향적설계풍부면，분별고필료당전주변건축군체화미래주변건축군체량충군체효응공황，근거시험결과계산료해결구고필군체효응적기저등효풍하재반력、각립면풍압분포화풍궤발전효솔。결과표명，건축외형불규칙적쌍탑대기류유명현적개변차작용효과불동우상규구형초고층건축，배합루층평면척촌축층축소，유효완화료수향풍하재재건축고도상적분포。수군체효응영향，재당전화미래주변건축군량충공황하，쌍탑량개주축방향기저등효풍하재결과변화명현；군방고도풍압분포변화우위현저，급해처풍궤취풍구적설치조성곤난；탑루수향풍압분포발생개변，영향료풍궤발전효솔。인차설계시수고필군체효응영향，합리선택풍궤취풍구위치이피면주변건축군체개변대풍력발전적불리영향。
In order to analyze the influences of building group effects on wind load and wind power generation for supper tall building, wind tunnel test of a 250 meters high building with huge basement and two irregular shaped towers was conducted by small-scale models. Low returned period wind speed of 1 year, 5year and 10 years of the construction ground and designed wind speed sections without the typhoon influences were achieved by wind climate analysis. And two group effects conditions of current surrounding buildings group and future buildings group were simulated and compared. By the wind tunnel test results, equivalent static wind loads of base level, wind pressure distributions and efficiency of wind power generation of the supper tall building were obtained. The results showed that, significant wind flow changes caused by two irregular shaped supper tall towers were obtained, which was different to regular rectangular shaped supper tall building. The vertical wind load distributions of the building were effectively relieved by reducing floor size gradually. Influenced by the group effects, two axis equivalent static wind load of two towers base level were significantly changed under two working conditions of current surrounding buildings group and future buildings group. The wind pressure distributions of atrium were especially significantly, which made it difficult to set suction inlet in this area. The efficiency of wind power generation was influenced by the vertical wind pressure distributions along the tower. As a result, it was wise to set suction inlet locations by considering the group effects in order to avoid disadvantage influences of surrounding building group changes on wind power generation.