摘要:研究目的:为促进悬挂式单轨交通系统在我国的发展，通过收集国外已运营悬挂式单轨线路的资料，分 析悬挂式单轨交通系统中桥梁结构的轨道梁、桥墩和支撑约束的主要形式，提出一种30 m双线简支梁的悬挂 式单轨桥梁结构形式。研究结论:（1）结合国外已建成悬挂式单轨桥梁结构特点，考虑我国国情，确认轨道梁横截面为大断面， 标准跨度为30 m; (2)悬挂式单轨系统桥墩为T型结构，桥墩设计半径取1.5 m,高度取14 m; (3)对该30 m 双线三跨简支梁悬挂式单轨桥梁结构进行了自振分析,计算表明桥梁结构的横弯基频和竖弯基频分别为 2. 620 Hz和5. 398 Hz ; 3)研究表明，该30 m悬挂式单轨系统桥梁结构适合我国国情且结构安全可靠，为今后 悬挂式单轨系统建设提供了一定的参考。

Abstract ： Research purposes ： In order to promote the development of suspended monorail system，the information of monorail operation lines abroad is summarized firstly, the primary type for track beam, pier and supported constraints of bridge structure for suspended monorail system is determined，and a suitable bridge structure of 30 m- span double - line simple beam for suspended monorail is presented finally. Research conclusions:( 1 ) According to the existing bridge structure features of suspended monorail abroad， considering the current situations in China, the cross section of track beam adopts large section, and the standard span is 30 m. (2) The pier structure for suspended monorail adopts T - type，the design radius and height of pier are 1.5m and 14 m respectively. ( 3 ) A suitable bridge model of 30 m - span double - line three - span simple beam for suspended monorail is supplied for the follow vibration analysis. The results show that the fundamental frequencies for transversal and vertical bending are 2.620 Hz and 5. 398 Hz. (3) The research shows that this 30 m - span bridge structure for suspended monorail system is reliable and suits the current situations in China，which provides a reference for the construction of suspended monorail transit system.