白鹿原大散关抗震设计与研究

Seismic Design and Research of Sanguan Pass in Bailuyuan

白鹿原大散关是我国传统建筑中典型的重檐庑殿汉式建筑,通过计算周期折减系数取1.0、按照实际隔墙填充墙位置与洞口输入的模型,与考虑周期折减系数取0.7、不输入实际隔墙位置的模型,对比分析了两个模型的周期、最大层间位移角、配筋等整体指标参数。计算结果表明:模型各项控制参数均满足规范要求,设计模型安全可靠;考虑到结构二层开大洞,局部水平构件传力不明确,顶层结构为单榀框架的不利影响后,使用计算软件YJK、PMSAP对结构进行了弹性时程分析与动力弹塑性时程分析,验证了结构采取全楼地震力作用放大系数1.021后,结构设计的实配钢筋也满足抗震设计规范要求,与结构达到"三水准"抗震设防性能的能力。对大散关结构中存在的抗震不利部分(抗震不利地段,水平大开洞,顶层单榀框架,斜外墙)提出了可靠的加强措施。

Bailuyuan Sanguans is a typical double eaved hall Han style building in China’s traditional architecture.By calculating the period reduction coefficient of 1.0,according to the model of actual partition wall filling wall position and portal input and considering the period reduction coefficient of 0.7,without inputting the actual partition wall position,the paper compares and analyzes the period,maximum inter story displacement angle,reinforcement and other overall index parameters of the two models.The results show that the control parameters of the model meet the requirements of the code,and the design model is safe and reliable.Considering the large opening in the second floor of the structure,the force transmission of local horizontal members is not clear,and the adverse effect of the top structure is a single frame,the elastic time history analysis and dynamic elastic-plastic time history analysis of the structure were carried out by using the calculation software YJK,PMSAP,and the amplification coefficient of seismic force of the whole building is 1.021,The actual reinforcement of the structural design also meets the requirements of the seismic design code,and the ability of the structure to achieve"three levels"of seismic performance.Reliable strengthening measures were put forward for the disadvantageous parts(disadvantageous sections,large horizontal openings,single frame on the top floor,inclined external walls)in the structure.