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<h2>Xiaoming LEI Graduate Student Chang’an University Xi’an, China leixiaoming@outlook.com</h2><h2>Zhun RAN Graduate Student Chang’an University Xi’an, China 1501490929@qq.com</h2><h2>Mengjin SUN</h2><p>Graduate Student</p><p>Univ. of California, San Diego La Jolla, United States summersmj@qq.com</p><h2>Fengqi ZHOU Graduate Student Chang’an University Xi’an, China 1094633714@qq.com</h2><p>The main cable of spatial cable suspension bridge has a large lateral deviation from the free cable state to finished bridge state, hangers will be bended or even enable to anchor due to its large lateral drift angle. A new method named “lateral brace between main cables” is proposed It has been successfully used in a project. The detailed comparison is undertaking to construction analysis of Jiangdong bridge between temporary hanger method and temporary lateral brace between main cables method. Analysis of the component force in the process of girder hoisting as well as its influence on the lateral deviation of main cables and the lateral drift angle of hangers. The result shows that the proposed method can satisfy the needs of hangers and lateral braces force, and has a very small lateral deviation and lateral drift angle. This method is easy and widely suitable.</p>

This paper presents a magnetron sputtering Al/Cu bilayer film solder to realize the brazing of AlN ceramic and Al metal. The effect of different temperatures on the structure and mechanical properties of brazed joints is studied. The results show that the sputtered Al particles have a sputtering wetting effect on AlN ceramic. The contact angle of molten Al on AlN ceramic with Al film deposited at 700 °C is as low as about 30°. While the contact angle of molten Al on AlN ceramic without Al film deposited at 1000 °C is about 89°. There is a large amount of Cu enrichment in brazed joints at 600 °C. The weld structure is a mixture of Al solid solution and AlCu compound. The shear strength of the brazed joint is only 70.6 MPa, and the joint fracture shows a large number of brittle fracture morphologies. With the increase of brazing temperature, the phenomenon of Cu enrichment in the joint gradually weakens, and the weld structure gradually transforms into a solid solution of Cu in Al. The shear strength of the brazed joint continues to increase, and the joint fracture morphology gradually changes from brittle fracture to furrow-like plastic fracture morphology. When the brazing temperature is increased to 660 °C, the distribution of Cu in the joint is evenly dispersed, and the shear strength of the brazed joint reaches the highest value of 107.8 MPa. The joint fracture is completely furrow-like plastic fracture morphological composition.