皮带通廊属特种结构，在工业中起着连接生产线的重要作用。近年来，随着我国工业的发展，其应用量也越来越大。目前，虽有学者对皮带通廊结构进行了理论与设计方面的研究，但对其地震反应特点的研究还不够深入。本文将以皮带通廊的主体结构——钢桥架为研究对象，结合工程实例，利用SAP2000对其动力特性进行分析研究，得到皮带通廊桥架结构地震反应特性。 本文按照结构的实际尺寸，建立了桥架的三维整体有限元计算模型。通过对结构进行模态分析，表明低阶振型为整体振动，高阶振型中结构出现了不同形式的局部振动，建议应取适量的振型组合数，避免高阶振型丢失，以全面反映结构的动力特性。另外，模态分析还反映出桥架上端的顶面横梁竖向刚度最弱，下拉吊杆垂直支撑沿纵桥向刚度很弱。 本文按照《建筑抗震设计规范》的相关规定，同时考虑了水平及竖向地震作用对结构的影响，采用反应谱法和时程分析法分析了桥架结构在4种不同工况下的地震反应。两种方法所得结果规律大致相同，但反应谱法计算结果偏大，即反应谱法可反映结构的最大内力值。计算结果表明：竖向地震力对结构受力和位移变化起主导作用；桥架跨中的上弦杆件受力和位移都是最大的，属结构控制杆件；下弦的控制杆件在桥架下端；斜腹杆的控制杆件在桥架两端；下拉吊杆弦杆受力很均匀；下拉吊杆垂直杆件受扭矩，属于结构的薄弱环节。 本文在分析计算结果的基础上针对性地提了一些抗震建议，为工程人员更加合理地设计皮带通廊桥架，提高结构的抗震性能有一定的指导作用。

Belt Corridor is a special structure, plays an important role of connecting the production line in the industry. In recent years, with the development of our industrial, its demand is also growing. At present, although scholars have done some theory and design research of the belt corridor structure, but its seismic response characteristics of the study is not enough. With an engineering example, this article will use the SAP2000 to study the dynamic characteristics of the steel bridge, the main structure of the belt corridor, to get its seismic response. The steel bridge’s 3-D finite element model of overall structure were established, whose calculation models are set up according to the actual size of the structure. Modal analysis of the structure indicates that the low-order modes for the overall vibration, the higher modes for the different forms of local vibration. It is recommended that the right amount of vibration number of combinations shall be taken to avoid the higher modes lost, to be fully reflected the dynamic characteristics of the structure. In addition, modal analysis also reflects the weakest parts of the vertical stiffness are the top beams of the bridge，and drop-down boom vertical support along the longitudinal stiffness is very weak. In accordance with the relevant provisions of the "Seismic Design of Buildings" ,this paper taking into account the horizontal and vertical seismic effects on the structure and use the response spectrum and time history analysis method to analyze the seismic response of the bridge structure in four different operating conditions. The two methods obtained similar results, but the response spectrum method is larger, the response spectrum method can reflect the largest internal force of the structure. The results show that: the vertical seismic forces control the structure’s force and displacement; the force and displacement in the chord of the bridge are the largest, belonging to the control cross-section bar of the structure; the control section of the bottom chord is in the bottom of the bridge; the drop-down boom chord force is uniform; there are torque on the vertical bars of the drop-down boom, they are the weak link of the structure. On the basis of the analysis and calculation results, this paper raised some seismic recommends. More reasonable proposals have been given to design the belt corridor bridge frame and improve the seismic performance of the structure for the engineering staff.