| With the development of long-span cable-stayed bridge, the cable pylon bear more andmore heavy load, it put forward higher request for anchorage zone of cable-stayed bridge.The anchorage zone of the cable pylon is a key part for cable-stayed bridges, where theconcentrated force of cable will be transferred to the pylon safely and uniformly. So, analysisof strength performance at this area has been attracted attention in bridge engineering all thetime. The thesis is based on anchorage zone of Hangzhou Bay Sea-Crossing Bridgeã€XiangShan Gang highway bridge and Xia Zhang Sea-Crossing Bridge, adopting ANSYS system tocarry out detail definite-element analysis for the anchorage zone of every bridge (the outertype steel anchor box; built-in steel anchor box; steel anchor beam-steel corbel).The main work in this dissertation is as follows:1. This dissertation introduces the development history and application actualityat home and abroad, also summarizes the structure system and characteristics of anchoragezone in cable-stayed bridge.2. We design a space mode of the anchorage zone according to the similitude theory.Analysed the stress distribution and stress concentration of tower wall concrete, the outertype steel anchor box, built-in steel anchor box and steel anchor beam-steel corbel, andanalysed transfer mechanism of the three anchor structure.3. The measures to reform stress distribution and to reduce stress concentration arediscussed, some useful conclusion is obtained, And it is beneficial to the design of bridges.4. The result of finite element program show that three structure of the anchorage zoneare safe enough, also the economy of that is good and practical. Shear connector is feasiblefor anchorage zone of cable-stayed bridge.5. The work of this dissertation provide information about the popularization andapplication of the steel anchor box structure and steel anchor beam structure, it can offerviews for design and construction in similar structural. |
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