高层钢结构三维立体停车结构对升 降系统垂向冲击激励的动力响应

高层钢结构三维立体停车结构对升降系统垂向冲击激励的动力响应(中文10000字,英文4000字)
概要
对于垂直提升高层钢立体停车场结构，根据提升系统的运行方式对提升系统反复加速和减速产生的垂直碰撞激励进行分析和获取。建立了停车结构的动力学模型，利用有限元软件ANSYS（Ansys Inc.，Cecil Township，Pa，USA）对升降系统的垂向冲击激励的结构动力响应进行了分析。研究了提升笼提升高度，结构阻尼，停车箱，提速方式，提升系统异常运行等因素对结构动力响应的影响，并提出了相应的减振理性建议加速模式被给出。最后讨论了升降系统垂直冲击激励引起的结构动力屈曲问题。结果表明，起升系统启动后的加速阶段出现最大结构振动响应，并且取决于速度模式。此外，提升高度和结构阻尼对最大结构振动响应没有显着影响。建议将车辆从下到上对称停放在车库内，避免提升系统异常加速或停车。

关键词：高层立体停车结构; 起重系统; 速度模式; 垂直激励; 动态响应; 动态放大系


Dynamic response of the high-rise steel tridimensional parking structure for vertical impact excitation of the lifting system
SUMMARY
For the vertical lifting high-rise steel tridimensional parking structure, the vertical impact excitation resulting from the repeated acceleration and deceleration of the lifting system is analyzed and obtained according to the operational mode of lifting system. The dynamic model of the parking structure is established, and the structural dynamic response for vertical impact excitation of the lifting system is ana-lyzed by the finite element software ANSYS (Ansys Inc., Cecil Township, Pa, USA). Influence of various factors, such as the lifting height of the lifting cage, structural damping, parking case, speedup mode and abnormal operation of the lifting system, on the structural dynamic response is investigated, and the corre-sponding suggestions on vibration reduction and rational speedup mode are given. Finally, the structural dynamic buckling caused by vertical impact excitation of the lifting system is discussed. The results indicate that the maximum structural vibration response occurs in the acceleration stage after start of the lifting system and depends on the velocity pattern. Additionally, the lifting height and structural damping have not remarkable influence on the maximum structural vibration response. It is suggested that the vehicles be parked in the garage from bottom to top symmetrically, and the abnormal speedup or stop of the lifting system should be avoided. Copyright © 2015 John Wiley & Sons, Ltd.