山地大跨结构关键设计技术研究

Research on Key Design Techniques for Large-Span Structure on Slope

恒力应急指挥中心三侧靠山,形成两个高低接地面、具有特色的掉层高层建筑。结构通过设置钢桁架连接构件,将主体结构与山体形成有效连接,将掉层部分简化了嵌固端,简化了结构的边界条件。采用弹塑性分析对结构在罕遇地震下的承载力及刚度进行验证。同时采用山体与主体结构一体化的分析技术,找寻在真实地震工况下,主体与山体连接构件的内力,验证其可靠性。对于大跨结构,采用了新型的预应力型钢混凝土梁,有效降低结构自重,减小梁高,大幅提高结构效率。本工程属于具有特色的山地建筑,结构设计采用创新处理方法,能够为类似工程项目提供参考。

The Hengli Emergency Command Center is flanked by mountains on three sides,forming two high and low embedding ends,resulting in a distinctive high-rise building structure supported by foundations with two or more different elevations.The structure is effectively connected to the mountain by setting steel truss connecting components,simplifying the embedded end of the floors under the upper embedding end and simplifying the boundary conditions of the structure.The bearing capacity and stiffness of the structure under rare earthquakes are verified using elastic-plastic analysis.Simultaneously,an integrated analysis technology of the mountain and main structure is employed to determine the internal forces of the connecting components between the main body and the mountain under real earthquake conditions,and verify their reliability.For large-span structures,a new type of prestressed steel reinforced concrete beam has been adopted,which effectively reduces the structural weight,correspondingly reducing the beam height,and significantly improving structural efficiency.This project represents a unique mountainous building,and the structural design adopts innovative treatment methods,which can provide a reference for similar engineering projects.