某框支框架超限结构计算分析与设计

Structural Design and Analysis of an Overrun Frame-Supported Framework Structure

某复杂公建项目超限单体结构采用框支框架结构体系,其外部框架在2层及3层平面连续内收,形成二次转换体系。工程设计时选用SATWE、PMSAP程序进行了多遇地震、设防地震以及罕遇地震作用下的抗震分析和性能化设计,解决了局部大空间、二次转换结构等技术难点,达到了预定的性能目标,满足了三水准抗震设防要求。计算结果表明,本工程结构体系和构件具有较好的抗震性能和安全储备。文中阐述了为满足建筑功能要求而采用的大跨度型钢混凝土转换梁、型钢混凝土框支立柱等关键部位的分析和设计,可为相近的工程设计提供参考。

Structural design and analysis of a complex public construction project with the frame-supported framework structure were studied. A double-layer transfer structural system was used to solve the continuous setback issue of the lateral frame columns in the 2nd and 3rd architectural plan. The programs of SATWE and PMSAP procedure were applied to carry out the structural seismic analysis and the performance-based design of various earthquake actions in the whole designing process. With the technical difficulties such as partial large space in the 1st floor and the outside double-layer transfer system settled, the scheduled performance objectives and the three-level earthquake fortification objects were achieved. The numerical computation results show that this structural system is safe and reliable. The analysis and design methods of the key SRC transfer beam and SRC frame-supported upright column have been illuminated, and it can provide a reference for the design of similar projects.