洛阳隋唐城应天门遗址保护建筑单体结构设计

Single structure design of the conservation building of YingTianMen archaeological site of Luoyang City of Sui and Tang Dynasties

洛阳隋唐城应天门遗址保护建筑平面呈凹形布置,结构分缝后分为中部城楼、东西飞廊+朵楼+连廊、东西阙楼5个结构区段。为避让遗址和展示古代建筑形态,结构体系下部采用单跨斜柱支撑结构,中部采用空间桁架转换结构支撑上部框架结构,属于平面和竖向不规则体系。介绍了典型单体中部城楼区段、西飞廊+朵楼+连廊区段、西阙楼区段的设计方案、结构特点、分析结果及抗震设计原则。对各结构单体分别采用静力弹塑性分析、动力弹塑性分析方法进行罕遇地震作用下弹塑性分析,结果表明两种分析方法结果吻合,结构能够满足预期抗震性能目标。采用Push down分析方法考察下部遗址层在竖向荷载作用下的承载能力,结果表明下部遗址层具有足够的承载能力及塑性变形能力。

The plane of the conservation building of YingTianMen archaeological site of Luoyang City of Sui and Tang Dynasties is in the shape of the Chinese character“凹”.The structure is divided into five structural sections:middle tower,east and west Duolou and east and west Quelou.In order to avoid the site and display the ancient architectural form,the structural system adopts the single-span inclined column support structure in the lower part and the space truss transformation structure in the middle part to support the upper frame structure,which belongs to the plane and vertical irregularity system.The design scheme,structural characteristics,analysis results and seismic design principles of typical section as middle tower section,West Flying Corridor+Duolou+connecting corridor section and West Quelou section were introduced.The static elastoplastic analysis and dynamic elastoplastic analysis method were used for the elastoplastic analysis of each structure under rare earthquake action,respectively.The results of the two analysis methods are consistent,which shows that the structure can meet the expected seismic performance goal.Push down analysis method was used to investigate the bearing capacity of the lower site layer under vertical load.The results show that the lower site layer has sufficient bearing capacity and plastic deformation capacity.