铁道标准设计2016，Vol.60Issue(12)：71-73,74,4.DOI:10.13238/j.issn.1004-2954.2016.12.016
纵梁（肋）高度对正交异性板钢桥面系受力影响分析
Influence of longitudinal Beam (rib) Height on the Stress of the Orthotropic Plate of Steel Bridge
方桂芬1
作者信息
- 1. 中铁第一勘察设计院集团有限公司桥隧处，西安 710043
- 折叠
摘要
Abstract
The selection of components is critical to the safety and economy of bridge floor system. The plate element model of the deck is established with finite element analysis software to analyze every part of the orthotropic plate when the height of longitudinal beam or rib is changed, the influences of the change of the height of longitudinal beam or rib on the plate, cross beam, intersect excavated area of longitudinal beam( rib ) and the cross beam are summed up. The results show that increasing the height of the longitudinal beam increases gradually the normal stress of longitudinal beam itself, and decreases gradually the normal stress of U rib; the principal tensile stress of the rib beam increases near the hole where the U rib cross, the principal tensile stress of corresponding local of Cross rib decreases, but the extent of decrease or increase is smaller;changing T girder height has little impact on the global stress of the cross beam, and can be ignored;the reasonable height of longitudinal beam is 0. 35~0. 4 time of the cross beam;too big or too small of the height of U ribs leads to undesirable stress uniformity of the bridge deck, resulting in bigger principal tensile stress; increasing the height of the U rib results in gradual decrease of the normal stress of the longitudinal beam, and the stress of U rib itself is not in a linear trend, but in a “zigzag” changing trend; changing U rib height has little impact on the global stress of the bridge deck slab and the reasonable height range of U rib is 240~280 mm.关键词
铁路钢桥/纵梁高度/纵肋高度/桥面系/正应力/主拉应力/横梁/横肋/挖孔方式Key words
Railway steel bridge/Height of longitudinal beam/Height of longitudinal rib/Floor system/Normal stress/Principal tensile stress/Cross beam/Cross rib/The way of cut-out分类
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方桂芬..纵梁（肋）高度对正交异性板钢桥面系受力影响分析[J].铁道标准设计,2016,60(12):71-73,74,4.
