重庆来福士广场抗风设计

Wind-resistant design of Raffles City in Chongqing

通过对重庆来福士广场项目的风气候分析、复杂地形风洞试验、多天平风洞试验、高频压力积分试验与第三方风洞试验,得到了等效静力风荷载与加速度响应,分别采用频域与时域方法分析了复杂连体多塔结构的风致响应,并对结果进行包络设计。单塔结构的测力天平与测压试验结果吻合性较好,多塔连体结构的第三方风洞试验与原有试验的平均值与背景值吻合较好,说明了试验方法的合理性。还在时域中采用LS-DYNA对塔楼与连桥之间的隔震支座在风荷载作用下的性能进行了研究。分析结果为重庆来福士广场项目设计提供了安全经济合理的设计风荷载。

The equivalent static wind loads and acceleration responses of Raffles City in Chongqing project were derived by doing researches involving wind climate analysis,complicated topography wind tunnel test,multi-high frequency force balance（ MHFFB） wind tunnel test,high frequency pressure integration（ HFPI） test and independent third party wind tunnel test. The frequency-domain analysis method and time-domain analysis method were used to analyze the wind-induced responses of complicated multi-tower connected structures,and then enveloped design was carried out on results. The test results of the HFFB and HFPI of the single tower are consistent with each other and the mean and background results from two different independent wind tunnel labs are also close to each other,which all justify the validity of test methodology. To check the performance of the seismic isolators between tower and linked bridge under wind loading,software LS-DYNA was used in time-domain analysis. The analysis results provide safe,economical and rational wind loads for the design of Chongqing Raffles City project.