承力索用于链形接触悬挂,位于接触线的上方,通过吊弦将接触线悬挂起来。由于短路接地、主导电回路不畅、雷击、线索交叉互磨、补偿装置卡滞及腐蚀等原因,常出现承力索断股、断线的现象。文章以高速铁路上常用的JTMH-120承力索为例,利用数理解析对工程速算法得出的JTMH-120承力索的最大断股数进行校验,进而验证利用工程速算法得出的接触网中常用的9类承力索最大断股数的数据是有效的。依靠所得数据,参照原铁道部关于承力索补强的技术标准,结合运营维护经验,综合多年普速铁路承力索的断股补强、重接案例,提出了一种维修措施处理高速铁路承力索断5股以上的情况。该措施在管内线路上运用,取得了良好的效果。这种维修措施补充已有的承力索断股维修措施,为接触网的检修工作提供有益的指导。

The catenary cable is nsed for system with catenary suspensim. It is above the contact wire and hang it through a hanger. Because of short circuit in grounding, poor return current, lightning and wearing of strands, the breaking of catenary cables occur now and then. Taking JTMH-120 for example, the method of mathematical analysis is used to check the maximum broken quantity of catenary cables which was calculated by engineering simplified. And then, the data of the maximum broken quantity of nine categories catenary cables using engineering simplified caculation is valid. Based on the data,MOR’s technical standards have been studied, the experience of operation and maintenance and the case of catenary reinforcement in railway have been referred. The maintenance is proposed when catenary has been found damaged in high-speed railways. This maintenance has achieved good results in managed railway. The existing catenary maintenance measures are completed to provide useful guida

吊杆损伤是中承式钢管混凝土提篮拱桥的常见损伤。由于吊杆损伤对索力以及自振频率均有明显影响,所以吊杆损伤的定位以及定量分析对桥梁检测至关重要。文中以铜瓦门大桥为背景工程,在有限元基准模型的基础之上,采用弹性模量折减法计算分析典型吊杆损伤组合对全桥吊杆索力变化的影响,对获取的大量计算数据加以提炼总结,得到了对吊杆损伤评估具有参考意义的结论。

Damages-to-the-suspenders-are-common-in-half-through-CFST-X-arch-bridges.Since-the-sus-pender-damage-will-influence-the-cable-forces-and-natural-frequencies-obviously,positioning-the-dam-age-and-analyzing-the-damage-degree-are-important-for-bridge-inspection.Based-on-the-baseline-finite-element-model-of-Tongwamen-Bridge,Young''s-modulus-reduction-method-is-employed-to-simulate-the-cable-force-changes-caused-by-the-suspender-damage.Numerical-results-are-investigated-and-summa-rized,and-the-conclusions-obtained-are-meaningful-for-evaluating-the-suspender-damage-of-half-through-CFST-X-arch-bridges.

区别于预应力锚固系统，在传统钢框架后锚梁锚固系统的基础上，南京长江第四大桥采用一种新型悬索桥主缆锚固系统——分布传力式锚固系统。钢框架后锚梁锚固系统依靠后锚梁刚性承载，应力集中明显，有一定的结构和安全风险。分布传力式锚固系统锚固区域通过布置多排钢筋混凝土榫剪力键（PBL），变刚性承压承载为柔性承载，索力渐次传递至锚体混凝土；变集中承载为分布传力式承载，扩大了传力区域，减小应力集中，降低结构风险；利用PBL良好的延性，同时通过设置末端承压板，为结构整体提供足够的安全储备。本文对这种新型锚固系统的设计作了简要介绍。

Superior to conventional pre-stressed anchorage system,a new anchorage system design con-cept of cable-stayed bridge,the stress distributed transmitting anchorage system,is adopted to the Fourth Nan-jing Yangtze River Bridge referencing to the design of conventional steel framed anchorage system. The conven-tional steel framed system relies on the back anchorage beam,which provides rigid bearing supports and results in large concentrated stress,and has certain risks on both structural and safety aspects. However,the stress dis-tributed transmitting anchorage system is arranged with several rows of reinforced concrete tenon-joint shear con-nector (PBL) in anchoring area in order to transform the rigid bearing supports to flexible bearing supports which helps cable stress gradually delivering to concrete anchorage block,changes the pattern of stress distribu-tion from concentrated to distributed,enlarges the stress region,decreases the degree of stress concentration, minimizes the struct

Loukouni桥是刚果(布)1号公路Ⅱ期工程中的一座采用缆索吊装的上承式钢箱拱桥,为保证其施工过程的安全性,用零弯矩法、零位移法和定长扣索法,分别获得了施工过程中扣索索力和拱肋预抬值,并利用通用有限元软件ANSYS的生死单元功能对施工过程进行了仿真分析.计算结果表明:定长扣索法和零位移法确定的施工方案均能满足拱肋线形、施工截面应力和变形控制的要求,定长扣索法更优,可以作为该桥施工首选的设计方案;试算零位移法是确定施工扣索索力的一种简便有效的方法.

Loukouni bridge is a deck type arch bridge with box section and is a part of the second stage of the first national road project of the Republic of Congo. This bridge will be constructed with cable erecting equipment. To make sure its construction safety,three methods,including the zero moment method,the zero displacement method and the invariable cable method,were used to calculate the cable force of fastening cable and the pre-camber of main arch during the construction. Live and dead elements provided by the general FE (finite element)software ANSYS were utilized to simulate the construction of the bridge. The research result shows that both the zero displacement method and the invariable cable method can meet the construction demand in terms of the shape of the arch,the stress of arch section and the deformation of the arch. In the two methods,the invariable cable method is better and should be the first choice applied to the Loukouni bridge. The trial zero displacement method is a

结合沪杭客专松江特大桥136#、137#门式墩施工,介绍了上跨既有铁路的门式墩盖梁采用工字钢膺架法施工技术,论述了在紧靠既有铁路、结构底面紧邻接触网承力索情况下,盖梁现浇的主要控制要点,对上跨既有线结构现浇法施工有一定指导意义。

The paper,based on No.136 and No.137 gate pier construction of Songjiang Bridge on Shanghai-Hangzhou pas-senger railway,introduces that the construction technology of gate pier capping beam over existing railway with the “工”style beam scaffolding construction technology.And it discusses the key control points of capping beam casting close to ex-isting railway and the structure underneath close to the catenaries,which can provide reference for casting construction over existing structure.