基于实测台风数据的超高层建筑非线性计算

基于从有限元模型导出的多自由度系统和实测台风数据，对深圳地王大厦进行了非线性数值模拟。比较研究了振幅相关阻尼与一系列常数阻尼对各种强度的台风激励下结构响应的影响。探讨了振幅相关阻尼的等效常数阻尼的存在性和特点，它与激励强度的关系和在脉动风平稳和非平稳条件下的特点，以及用它来进行超高层结构设计时可能会遇到的问题。

A nonlinear numerical research on super-tall building based on typhoon measurements

The wind-induced responses of Diwang building with 324m high and 79-story,were numerically evaluated in time domain on the basis of the measurements of full-scale building under actual typhoon and the established finite element model of the building.The predicted dynamic responses of the building using the actual amplitude-dependent damping characteristics were compared to those computed by using a series of constant damping parameters including what is assumed by the structural designers.It is found that there may exist a RMS equivalent damping(RMSE Damping),which has the smallest RMS error and is,in some sense,a good approximate to the amplitude-dependent damping.The characteristic of the RMSE damping were discussed,including how does it change with the turbulent wind excitations,what does it represent when the response is a stationary or non-stationary process,and what will encounter when it is used in design.