典型体型超高层建筑风振效应分析  

Comparative Analysis of Wind-induced Vibration Effect Calculation of Super High-rise Buildings Based on Wind Tunnel Test and Code Calculations

作　　者：叶风华 YE Fenghua(Guangdong Construction Engineering Architecture Design Group Co.,Ltd.Guangzhou 510500,China;Guangdong Jianke Construction Drawing Review Co.,Ltd.Guangzhou 510500,China)

机构地区：[1]广东省广建设计集团有限公司,广州510500 [2]广东建科施工图审查有限公司,广州510010

出　　处：《广东土木与建筑》2022年第12期79-83,共5页Guangdong Architecture Civil Engineering

摘　　要：基于国内外5个规范对比研究了两种不同动力特性的超高层建筑的风致动力效应,并与风洞试验结果进行对比分析,基于风洞试验数据的结构风振响应计算采用非拟定常方法,基于现行规范的结构风振响应计算采用拟定常方法,探讨了超高层结构在不同风向角风荷载输入下的结构风荷载、基底剪力、基底弯矩以及顶点加速度等参数。研究结果表明:基于现行《建筑结构荷载规范:GB 50009—2012》[1]计算得到的两种超高层结构顺风向与横风向的风荷载、基底剪力、基底弯矩均较风洞试验和其他规范大,具有较高的安全裕度;应充分考虑周围环境对目标建筑物的干扰效应,结构顺风向和横风向风荷载因环境干扰而差异很大,沿高度方向平均差异达31.16%;文献[1]对于双向抗侧刚度较为均匀的建筑,其顶点舒适度计算结果具有较高的可靠性,但相比风洞试验结果及日本规范而言偏低,尤其是横风向,较日本规范最大低47%。Based on five codes at home and abroad,the wind-induced dynamic effects of two kinds of super high-rise buildings with dif‐ferent dynamic characteristics are compared and analyzed with the wind tunnel test results.Based on the wind tunnel test data,the wind-in‐duced vibration response of the structure is calculated by the non constant method,and the wind-induced vibration response of the structure based on the current code is calculated by the constant method.The structural wind load,base shear,base bending moment and vertex acceler‐ation of the super high-rise structure under the wind load input of different wind directions are then discussed.The results show that the along and cross wind loads,base shear and base bending moment of the two super high-rise structures calculated based on the current load code for building structures are larger than those of wind tunnel test and other codes,and have higher safety margin.The interference effect of the sur‐rounding environment on the target building shall be fully considered.The along and cross wind loads of the structure vary greatly due to envi‐ronmental interference,with an average difference of 31.16%along the height direction.The current load code for building structures has high reliability for the calculation results of vertex comfort of buildings with uniform two-way lateral stiffness,but it is lower than the wind tunnel test results and Japanese codes,especially in the cross wind direction,which is 47%lower than the maximum of Japanese codes.

关 键 词：超高层结构 风荷载规范 风洞试验 动力响应 舒适度 

分 类 号：TU973.213[建筑科学—结构工程]