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Fatigue Analysis of Cable Anchorages on Cable-Stayed Bridges

机译:斜拉桥索锚固的疲劳分析

摘要

The cable anchorage blocks that transfer the deck loads to the cables have complex details which significantly influence the long – term fatigue behaviour of cable – stayed bridges in operation. Determination of the stress ranges at one of the most critical parts in the cable anchorage due to traffic loads passing over the bridge is determined by using the finite element (FE) method. This paper investigates three different approaches namely node stress concentration, average elements and the hot-spot method in order to identify the stress ranges thatudadversely affect the remaining fatigue life of a cable anchorage. Finally, by using the FatigueudLoad Model 4 (FLM4) proposed in the Euro code, the proposed fatigue remaining life in cableudanchorage is determined and discussed.
机译:将甲板载荷转移到电缆上的电缆锚固块具有复杂的细节,这极大地影响了运营中的斜拉桥的长期疲劳性能。通过使用有限元(FE)方法确定由于穿过桥的交通荷载而导致的电缆锚固中最关键部位之一的应力范围的确定。本文研究了三种不同的方法,即节点应力集中,平均单元法和热点方法,以识别对电缆锚固的剩余疲劳寿命有不利影响的应力范围。最后,通过使用欧洲规范中提出的疲劳载荷模型4(FLM4),确定并讨论了电缆锚固中提议的疲劳剩余寿命。

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