【作者】 王林；

【导师】 张谢东； 罗天发；

【作者基本信息】 武汉理工大学 ， 船舶与海洋工程， 2002， 硕士

【摘要】 钢结构梁因为强度高、刚度大、自重轻、施工便捷等特点，作为特大跨径桥梁优选上部结构，被广泛采用。特别是上世纪九十年代以后，在我国修建的一系列跨江跨海特大型桥梁中，很多桥梁上部结构采用了钢结构。钢桥面板焊接在各种横向、纵向加劲肋上，桥面板为正交异性板结构，决定了其上的铺装层受力变形的复杂性。另外，由于钢材良好的热导性，又确定了其上铺装层应具有良好的热稳定性和低温变形能力。 从铺装材料和施工方法来分类，目前世界上所采用的钢桥面铺装体系，概括起来大致有四类： 第一类为高温拌和浇注式沥青混凝土(Gussasphalt)，第二类为沥青玛蹄脂混合料(Mastic Asphalt)(实际上也是浇注式沥青混凝土，只是拌和、摊铺工艺有所不同)，第三类为沥青玛蹄脂碎石混合料(Stone Mastic Asphalt，简称SMA)，第四类为环氧树脂沥青混合料(Epoxy Asphalt)。 SMA因为抗车辙能力强，耐久性好，在欧洲、日本、美国得到了广泛应用，但在我国还处于试验研究阶段。 本文针对武汉军山长江公路大桥钢箱梁桥面铺装工程，从铺装层环境温度变化范围、交通量等使用条件出发，在用ALGOR FEAS有限元分析软件分析铺装层受力变形基础上，提出了(即钢板+金属锌涂层+封闭层+粘接剂+预拌沥青碎石+双层SMA)的高性能钢桥面SMA铺装体系，并对这种SMA的组成材料，包括改性沥青、集料、矿粉、纤维进行了比较研究，设计了这种SMA的配合比，对SMA混合料的性能进行了对比试验，对这种SMA方案进行了疲劳性能研究，验证了所选择SMA方案的可行性。更多还原

【Abstract】 The steel-structure girder has been widely adopted as the super structure of extra-long span bridges, because of its hypertension, gigantic-stiffness, light-weight and convenience of construction as well. In China, especially since the 1990s, steel-structures have been introduced into a lot of grand bridges which spanned over roaring rivers and surging seas. Steel decks, in other words, orthodox isomerism structures, are welded with various transverse and longitudinal reinforcing ribs. This results in the complexity of forces and deformatiort of the pavement layer above the deck. In addition, due to the good thermal conductivity of steel materials, the pavement layer upon the deck should have good thermal stabilities and low temperature deformation abilities.In terms of paving materials and erecting methods, the steel deck pavement systems adopted in the world can be generalized into four types:The first one is the Gussasphalt. Then is the Mastic Asphalt. Another one is the Stone Mastic Asphalt. And the last one is the Epoxy Asphalt.SMA has been widely applied in western countries such as European countries, Japan and America for its strong anti-track capability and well durability. It is still under experimental stage yet in China.In this paper, a high performance SMA system applied to steel bridge deck is put forth in allusion to the pavement project of the Wuhan Junshan Yangtze River Highway Bridge. It comprises steel slab, Zn coating layer, closing layer, adhesive, pre-mixed asphalt stone and dual layer SMA from bottom to top. It is based on the FEA results of the forces and deformation of the pavement layer by means of the ALGOR FEAS, according to this bridge’s traffic and the ambient temperature varying range of the pavement layer. The ingredients of this type of SMA system, such as altering asphalt, aggregations, mineral powder and fiber, have been studied deeply. Various components have been compared in detail as well. Therefore, the appropriate component of this type of SMA was decided. Furthermore, several experiments aboutthe fatigue performance of the pavement and the SMA mixture’s performance had been carried out. All these experimental results verify and vouch for the feasibility of the SMA system concerned above.更多还原