权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study on Design method and Fatigue Durability of Cantilever slabs for Highway bridge

公路桥梁悬臂板设计方法及疲劳耐久性研究

基本信息

批准号：
13450188
负责人：
MATSUI Shigeyuki
金额：
$ 8.7万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450188/
关键词：
cantilever slab of highway bridge orthotropy fatigue test by wheel running machine wind load serviceability limit state bending moment formula design method

项目摘要

The aim of this study is to establish an appropriate design method for the cantilever slabs of highway bridges. To recognize real behavior of various slab types in serviceability limit state, the fatigue loading method with wheel running machines seems to be very important for the slabs. After the loading test, a static loading test was carried out to investigate the effect of cracks of concrete and remaining bending rigidities.In 2001, the essential slabs of RC slabs and PC slab prestressed in longitudinal direction were surveyed their behavior with the wheel running machine. In 2002, the test specimen types were expanded to PC slabs prestressed in the lateral direction, half-precast prestressed concrete slabs, steel plate and concrete composite desks and Channel shape PC slabs. After fatigue loading to give deterioration until serviceability limit states, static loading tests were carried out to investigate the effect or prestressing and to certify the occurrence of orthotropy. Due to the occurrence of cracks in the concrete, the behavior of slabs change from isotropic plate to orthotropic plate but by the type of decks the orthotropy is different from each other and the bending moments in orthogonal two ways change also. Those orthotropy was examined through the fatigue tests.In urban area, very high-rise shelters are placed at the edge of cantilever slab to cut noise from, vehicle running on highway. When the shelters are subjected to strong wind load, it will issue a large bending moment to the cantilever slab. In this study, certification of the effect of wind load was investigated experimentally with special loading equipments. The tests were carried out on a RC slab and a steel plate-concrete composite deck.Based on the above mentioned experimental study and analytical verifications, appropriate design method including deriving bending moment formulae was proposed by taking into account the orthotropy of the decks.

本研究的目的是建立一种适合公路桥梁悬臂板的设计方法。为了更好地了解各种楼板在正常使用极限状态下的真实行为，轮式试验机的疲劳加载方法对于楼板而言显得尤为重要。加载试验结束后，进行了静载试验，以考察混凝土裂缝和剩余抗弯刚度的影响。2001年，在轮式试验机上对纵向预应力的RC板和PC板的基本板进行了性能测试。2002年，试件类型扩大到横向预应力PC板、半预制预应力混凝土板、钢板与混凝土组合台和槽型PC板。在疲劳加载使其劣化到使用极限状态后，进行静载试验，以考察预应力或预应力的影响，并验证是否发生了各向异性。由于混凝土裂缝的产生，板的受力性能由各向同性板转变为各向异性板，但不同桥面类型的各向异性各向异性不同，正交双向弯矩也不同。通过疲劳试验检验了车辆的各向异性。在城市地区，超高层的遮蔽物被放置在悬臂板的边缘，以降低车辆在高速公路上行驶的噪音。当遮阳棚受到强风荷载作用时，会对悬臂板产生较大的弯矩。在本研究中，利用特殊的加载设备对风荷载的影响进行了验证。通过对钢筋混凝土板和钢板-混凝土组合桥面板的试验研究和分析验证，提出了考虑桥面各向异性的弯矩计算公式。