黎巴嫩高等音乐学院大音乐厅罕遇地震弹塑性分析与抗震性能评价  

Elastoplastic analysis and seismic performance evaluation for the large concert hall of Lebanese National Higher Conservatory of Music under rare earthquake

作　　者：刘杰 孟永杰 LIU Jie;MENG Yongjie(China IPPR International Engineering Co.,Ltd.,Beijing 100089,China)

机构地区：[1]中国中元国际工程有限公司,北京100089

出　　处：《建筑结构》2022年第S01期782-787,共6页Building Structure

摘　　要：黎巴嫩高等音乐学院大音乐厅为复杂大跨度空旷结构,抗侧力体系采用现浇钢筋混凝土框架-剪力墙,大跨度种植屋面采用变高度钢桁架和钢筋桁架楼承板组合方案,音乐厅池座采用葡萄园式布置方式,框架梁、柱交叉错落布置,平面及竖向极不规则。采用SAUSAGE软件进行罕遇地震弹塑性动力时程分析,计算结构总体变形和层间变形,探究结构是否存在显著的侧向变形以及严重的软弱层;通过结构基底剪力及层间剪力响应情况评价结构总体地震响应并判断结构是否存在薄弱层;考察主要抗侧力构件的屈服时序和塑性损伤分布情况,判断其在罕遇地震作用过程中是否可以实现预定的屈服顺序和性能水准;最后分析大跨度重屋面、跃层柱及池座处不规则布置的框架柱和高差较大的框架梁等关键构件在罕遇地震下的应力分布、损伤情况及性能水准,针对薄弱部位提出加强措施,进而优化设计。The large concert hall of Lebanese National Higher Conservatory of Music is a complex large-span structure.The cast-in-situ reinforced concrete frame-shear wall structure is used as the lateral force resistance system.The long-span planting roof adopts the combination scheme of variable height steel truss and reinforced truss deck.The seat of the concert hall adopts the vineyard layout mode,the beams and columns are staggered,which are extremely irregular in plane and vertical.The elastic-plastic dynamic time history analysis under rare earthquake was carried out by using SAUSAGE software,the overall deformation and story drift of the structure were calculated,and whether there are significant lateral deformation and serious weak floors in the structure were explored.The overall seismic response of the structure was evaluated by the shear response of the structure base and between floors,and whether there are weak floors in the structure was judged.The yield sequence and plastic damage distribution of the main lateral force resisting members were investigated,and whether they can achieve the predetermined yield sequence and performance level under rare earthquake was judged.Finally,the stress distribution,damage and performance level of key components such as large-span heavy roof,thermocline column,irregular frame column and frame beam with large height difference under rare earthquake were analyzed,and the strengthening measures were put forward for the weak parts so as to optimize the design.

关 键 词：大跨度结构 弹塑性动力时程分析 抗震性能 SAUSAGE软件 

分 类 号：TU352.11[建筑科学—结构工程] TU313