两管平行单管提篮内倾三肢桁架拱稳定性研究

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Abstract Research purposes: The main bridge of HuTiaomen River Bridge is one of the major projects of the Guangzhou － Zhuhai Railway;Main arch is a new structure of truss － arch with three tubes included parallel two － tubes and basket handle inclination of one － tube． Various influence factors were studied ，including inclination of the arch Ribs ，spatial position of the basket handle one － tube，different types of crossbars and cross － sections of the arch ribs， thus making a optimal design and providing reference to the similar works in future．

Research conclusions:The augmentation of the basket handle inclination of one － tube’s sloping angle is beneficial to improve the stability of the arch bridge ，while the spatial position of one － tube has little effects on it． Besides，the design of K － type crossbar at the impost of arch is very necessary，which greatly improve the stability of whole bridge structure． However ，there is no marked distinction on the structural stability between 米－ type crossbar and K － type crossbar． Increasing the cross － section of arch ribs has little effects on improving their transversal stability．

Key words： basket handle inclination of one － tube three tubes truss arch stability crossbar

Received: 15 October 2011

PACS:

U448． 224

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Cite this article:

WANG Peng Yu. Stability Study of Truss － arch with Three Tubes included Parallel Two －tubes and Basket Handle Inclination of One － tube[J]. 铁道工程学报, 2012, 29(6): 50-54.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2012/V29/I6/50

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