目前桥梁拉索体系锚固技术已经很成熟,防水防腐技术也不断提高,但在阻燃防火技术方面是滞后的.该文以桥梁阻燃拉索护套材料为研究对象,对桥梁阻燃拉索护套复合材料性能进行研究.结果表明,当复合材料的配比为80％HDPE和20％阻燃母粒时,拉伸强度达到了 18.7MPa,冲击强度为18.2 kJ/m2,弯曲强度为19.2MPa,氧指数为26％,桥梁阻燃拉索护套复合材料的技术性能和阻燃效果都达到了最好.

针对目前普遍存在的系杆防水性能差、容易腐蚀的问题,设计了全防腐系杆;通过水密性试验和耐久性试验验证其可靠性,并介绍了其在南充下中坝嘉陵江大桥的应用。试验及应用结果表明:该系杆具有安全可靠、防腐性能优异等技术优点。

PDF HTML XML Export Cite reminder Structure and Construction of Asymmetric Externally Inclined Steel Box Arch Bridge DOI: 10.59238/j.pt.2010.04.008 Author: Affiliation: (1.Liuzhou OVM Machinery Co., Ltd.,Liuzhou 545006,china;2.China Railway No.2 Engineering Group Co., Ltd,chengdu 600528) Clc Number: TU721 Fund Project: Article | Figures | Metrics | Reference | Related | Cited by | Materials | Comments Abstract:This article introduces the structural characteristics of Nanning Bridge, the world's first large span curved beam asymmetric outward tilting arch bridge, and elaborates on the construction plan of "arch first, beam later, arch supported beam, and steel rib arch assembled by diagonal tension buckle cantilever". Practice has proven that this construction method is successful and feasible. Under this guidance, the temporary tie rods, temporary suspension rods, temporary crossbeams, and cable wind cables set up to increase the longitudinal and transverse stability of the arch ribs play a crucial role in the installation safety and quality assurance of the entire externally inclined structure, providing good reference experience for similar bridges in the future Reference Related Cited by

PDF HTML XML Export Cite reminder Discussion on the Wear Durability of HDPE Outer Sheath for Bridge Cable DOI: 10.59238/j.pt.2009.05.004 Author: Affiliation: (Liuzhou OVM Machinery Co., Ltd) Clc Number: TU378 Fund Project: Article | Figures | Metrics | Reference | Related | Cited by | Materials | Comments Abstract:Prestressed cables are widely used in bridges and some large building structures. HDPE is commonly used as the outer sheath of cables and is an important protective layer for cables, playing a protective and anti-corrosion role, directly affecting the safe use of bridges and the lifespan of cables. The wear durability of HDPE was explored through fatigue wear performance tests of prestressed cables and steering gear, as well as friction loss tests with large sliding distances. The former focuses on micro vibration wear and conducts 2 million pulse vibration slip tests under bending stress and deflection stress to detect the degree of HDPE wear; The latter tests the friction rate between the steering gear and the HDPE sheath of the steel strand, simulating the actual force conditions, for vibration wear with a large sliding distance. Both sets of test results indicate that the wear rate of HDPE is very low, indicating that it has sufficient wear durability and can meet the general usage requirements of bridge cables. The test results can provide a certain reference for determining the design service life of bridge cables Reference Related Cited by

本文介绍了世界上首座大跨径曲线桥梁非对称外倾拱桥及其系杆,一种直线弹性孔道转向器被设计应用于该桥梁。直线弹性孔道转向器放置于拉索圆弧切线处,拉索在转向器处形成的偏移量很小,可通过孔道的弹性变形达到合理的转向,依靠孔道壁的弹性压缩变形,形成适当的弯曲线形。

The Optical fiber Bragg grating £¨OFBG£© sensors in the center of die was pultruded with fiber strands in the production of Fiber Reinforced Polymer £¨FRP£© bars, and the smart FRP-OFBG bars are produced.The smart FRP-OFBG bars are placed into the parallel wire stay cable with each end bonded by epoxy resin grouts in anchors, and a new type smart parallel wire stay cable can be obtained.The strains of the smart stay cables in service can be measured coinstantaneously with deformations of smart FRP-OFBG bars and wires, which can be used to monitor safety and estimate fatigue life. The specimen tests are carried out and the experimental results show that the measure method is reliable and is a high precise measurement.

PDF HTML XML Export Cite reminder Application of HDPE in bridge cable body and brief introduction of cable construction DOI: 10.59238/j.pt.2005.05.003 Author: Affiliation: (Liuzhou OVM Machinery Co., Ltd., Liuzhou 545005,China) Clc Number: U445.551;TQ325.12 Fund Project: Article | Figures | Metrics | Reference | Related | Cited by | Materials | Comments Abstract:HDPE plays an important role in the anticorrosion of prestressed reinforcement. This paper introduces the application of HDPE in bridge and the temperature control of construction environment through engineering examples. This paper also briefly introduces the construction of the stay cable, the derrick cable, the tie cable and the external cable. Reference Related Cited by