基于均匀设计的海峡两岸高层建筑顺风向风荷载多因素分析  

Multi-Factor Analysis of Along-wind Loads of High-Rise Buildings Between Chinese Taiwan and Mainland Areas Based on Uniform Design

作　　者：董锐[1,5] 梁斯宇 邱凌煜 罗元隆 刘国买 DONG Rui;LIANG Siyu;QIU Lingyu;LUO Yuanlong;LIU Guomai(College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;School of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,China;National Taipei University of Technology,Taipei 106344,China;School of Management,Fujian University of Technology,Fuzhou 350118,China;Fujian Civil Engineering and Architechtural Society,Fuzhou 350001,China)

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]厦门大学建筑与土木工程学院,福建厦门361005 [3]台北科技大学,中国台湾台北106344 [4]福建工程学院管理学院,福建福州350118 [5]福建省土木建筑学会,福建福州350001

出　　处：《同济大学学报（自然科学版）》2023年第9期1383-1394,共12页Journal of Tongji University:Natural Science

基　　金：福建省科技创新战略研究联合项目[2022R0154]。

摘　　要：为明确海峡两岸高层建筑顺风向风荷载的异同,对两岸建筑风荷载标准进行了对标分析,并采用均匀设计方法进行了高层建筑顺风向风荷载多因素分析。研究表明:两岸风荷载标准中基本风速取样方法和极值分布参数取值方法存在明显区别,风压高度变化系数分布和不同重现期的设计风速转换系数大致相同,台湾地区标准给出的湍流强度建议值明显大于内地标准;台湾地区标准分类计算建筑物主体和围护结构的设计风压,内地标准采用统一表达式,两者给出的设计风荷载组合方式区别明显;以基底剪力和基底弯矩作为评价指标,H/(BL)(1/2)(高宽比)、α地面粗糙度指数)、C_(g)(脉动效应系数)、C_(p)(风荷载体型系数)和Iz(湍流强度),对高层建筑顺风向风荷载的影响程度依次减小,H/(BL)(1/2)和α为主要影响因素;随H/(BL)(1/2)的增大,C_(g)对顺风向风荷载的影响逐渐增强,当H/(BL)(1/2)增大到一定程度时,C_(g)成为主导因素。In order to determine the difference and similarity of along-wind loads of high-rise buildings between Chinese Taiwan and Chinese mainland areas,benchmarking analysis was used to compare the wind load code for buildings on both sides of the Taiwan strait,and multi-factor analysis of along-wind loads of high-rise buildings was conducted using the uniform design method.The results show that there are significant differences in the basic wind speed sample method and extreme distribution parameter estimation methods.The wind pressure height coefficient distribution and conversion coefficient of design wind speed in different return periods for the two standards are roughly the same;The turbulence intensity values of the Taiwan region code is significantly larger than that of the mainland code;For the wind pressure calculation of main wind-force resisting system and cladding,Taiwan region wind load code adopts classification method,while the Mainland wind load code adopts a unified expression.There are significant differences between the two standards in the combination of design wind loads of along-wind,cross-wind,and torsional directions.Taking the base shear and base bending moment as evaluation indexes,the influence of aspect ratio H BL,exposure factorα,gust effect factor C_(g),wind load shape coefficient C_(p),and turbulence intensity Iz on the along-wind loads of high-rise buildings gradually decreases,and the aspect ratio and exposure factor are the main influencing factors.The influence of gust effect factor on along-wind load increases with the increase of the aspect ratio of the structure,and when the aspect ratio increases to a certain value,it becomes the main factor that dominates the alongwind loads of the both sides.

关 键 词：风荷载 顺风向 规范 均匀设计 高层建筑 台湾海峡 

分 类 号：TU973.213[建筑科学—结构工程]