伞形支架—— 一种新颖的桥梁支承构件的研究

Study on Umbralarshaped Support—A New Type ofSupport Element of Bridge Engineering

浦东机场航站区高架桥主梁与桥墩之间的“伞形”支架，是一种新颖的结构构件形式，其安全性问题备受关注。本文从理论上分析了“伞形”支架的受力状况、极限荷载及破坏形式，同时通过多组静力破坏试验，实测支架的受力性能和破坏荷载。通过理论分析与试验结果的比照得到对“伞形”支架的安全性评估。

The umbralarshaped support between a boxgirder and a pier of a bridge planned to be used in Shanghai Pudong International Airport viaduct, is a new type of structural component, the safety of which is mostly cared. The state of stress, ultimate load as well as the failure type of the umbralarshaped support are analyzed theoretically. Static destructive tests were conducted to a set of support models in order to observe the stress properties and failure loads, via which the safety of this support can be evaluated.