车辆基地上盖全框支剪力墙结构抗震性能振动台试验研究  

Shaking Table Test Study on Seismic Performance of Complete Frame-Supported Shear Wall Structure above Vehicle Depot

作　　者：马晓飞 MA Xiaofei(Shaanxi Railway and Underground Traffic Engineering Key Laboratory(FSDI),Xi'an 710043,China)

机构地区：[1]陕西省铁道及地下交通工程重点实验室(中铁一院),西安710043

出　　处：《铁道标准设计》2024年第9期166-174,共9页Railway Standard Design

基　　金：中铁第一勘察设计院集团有限公司科研开发项目(院科20-26)。

摘　　要：为充分研究厚板转换全框支剪力墙结构抗震性能,基于工程实例设计缩尺比例为1/15的抽层模型试件并进行振动台试验。通过对试件输入不同烈度的地震动激励,分析试验现象以研究结构破坏模式,进而根据试验结果探讨该类结构体系动力特性、加速度反应、楼层剪力反应及位移反应等地震响应变化规律。研究结果表明:7度(0.10 g)多遇、设防地震工况下结构处于弹性受力状态,7度(0.10 g)罕遇地震工况开始上部塔楼连梁等耗能构件逐渐屈服,结构由弹性受力状态进入弹塑性受力状态,结构自振频率下降明显,7度(0.15 g)及8度(0.20 g)罕遇地震工况下塔楼剪力墙开始屈服,转换厚板性能良好,结构自振频率下降趋于平缓,结构整体破坏机制合理且具有良好抗倒塌能力;同时高阶振型参与结构地震响应,结构顶端鞭梢效应明显;不同地震烈度下结构最大层间位移角均小于规范限值规定,表明结构可实现预定设防性能目标。最后根据试验现象及分析结果提出优化塔楼剪力墙布置、提高塔楼底部加强区剪力墙延性及重视中部、顶部楼层弯剪承载能力等设计建议。To investigate the seismic performance of complete frame-supported shear wall structure with thick plate of transition,a partial-layered scale model specimen with a scale ratio of 1∶15 was designed based on an actual engineering project and subjected to shaking table tests.By applying ground motion excitations of varying intensities to the specimen,the study analyzed its structural failure modes to explore the dynamic characteristics,acceleration response,story shear response,and displacement response of the structure under seismic conditions.Results indicated that the structure remained in an elastic stress state under intensity 7(0.10g)frequent and design earthquake conditions.In rare seismic events with an intensity of 7 degrees(0.10g),energy-consuming components,such as coupling beams in the upper tower gradually yielded,causing the structure to transition from an elastic to an elasto-plastic stress state,with a significant decrease in natural frequency.Shear walls of the upper tower began to yield under rare earthquake conditions with intensities of 7 degrees(0.15g)and 8 degrees(0.20g),while the thick plate of transition exhibited good performance.The decline in the natural frequency of the structure leveled off,and the overall failure mechanism remained reasonable,demonstrating good anti-collapse capacity.Analysis results also revealed that high-order modes contributed to its seismic responses,with a pronounced whipping effect at the top.The maximum inter-story drift angles under different seismic intensities were all below the code-specified limit,indicating that the structure can achieve the predetermined seismic performance objectives.Finally,based on experimental observations and analysis results,design recommendations were proposed,including optimizing the tower shear wall layout,enhancing the ductility of shear walls in the reinforced base zone,and emphasizing the flexural and shear bearing capacity of the middle and top floors.

关 键 词：车辆基地 上盖 全框支剪力墙 厚板转换 抽层缩尺模型 振动台试验 抗震性能 

分 类 号：U231[交通运输工程—道路与铁道工程] TU973[建筑科学—结构工程]