【摘要】 矩形截面高层建筑是最为常见的高层建筑形式之一，中国规范对其风荷载体型系数给出了便于使用的数值，但目前的取值并未达到安全性与经济性兼顾的目标。利用自行设计的模块化拼装模型系统拼装了33种不同高宽比和厚宽比工况的矩形截面模型，通过刚性模型测压风洞试验，探究了B类地貌下风荷载体型系数随不同工况的变化规律，并与现行规范取值进行对比。研究结果表明：矩形截面高层建筑顺风向整体风荷载体型系数试验结果与规范的变化趋势大体一致，但数值上存在一定偏差，在厚宽比小于1时规范取值偏于危险，大于1时则偏于保守；侧风面风荷载体型系数试验结果与规范存在显著差距，在厚宽比小于2.5时规范取值偏于危险，大于2.5时则偏于保守。给出了以高宽比和厚宽比为变量拟合得到的矩形截面高层建筑风荷载体型系数经验公式，可供工程应用及规范修订参考。更多还原

【Abstract】 Rectangular section high-rise buildings are one of the most common forms of high-rise buildings. The Chinese codes have given convenient values for their wind load shape coefficients, however the current values do not achieve the goal of both safety and economy. Thirty-three rectangular section models with different aspect ratios and side ratios were assembled by using self-designed modular model system, the the variation law of wind load shape coeficients with diferent test cases were investigated with rigid model pressure measurement wind tunnel tests in terrain category B and compared with the values in the current code.The research results show that the test results of along-wind overall wind load shape coefficients of rectangular section buildings are basically consistent with the change trend of the code, but there is a certain deviation in the value. The code value tends to be more dangerous when side ratio is less than 1, but more conservative when side ratio is larger than 1. The test results of wind load shape coefficient in crosswind surface are significantly different from the code. The code value for a side ratio less than 2.5 tends to be more dangerous, but more conservative for a side ratio larger than 2.5. The empirical formula of wind load shape coefficient of rectangular section high-rise buildings is obtained by fitting the aspect ratio and side ratio as variables, which can be used as a reference for engineering application and code revision.更多还原