摘要
对于大跨度钢箱梁斜拉桥而言,需通过索梁锚固结构实现斜拉索与主梁之间的荷载传递。该结构传递荷载大、传力机理复杂、局部应力集中问题突出,是大跨度钢斜拉桥的关键结构和构件之一。以典型的超大跨度斜拉桥——苏通大桥锚箱式索梁锚固结构为研究对象,通过理论研究与试验研究相结合的方法对于锚箱式索梁锚固结构的受力特性进行了研究。研究表明:理论模型与试验结果基本吻合,采用理论研究与模型试验相结合的研究方法对于锚箱结构的传力机理进行研究是可行的;锚箱结构各主要受力构件的受力特性存在较大差异;各关键受力构件均存在不同程度的应力集中,其中钢箱梁腹板、锚箱顶板和底板的应力集中问题较为突出。
For long-span cable-stayed bridges with steel box girders, the load transfer between cables and girders is accomplished by cable-girder anchorage. With the complex load transfer mechanism and stress concentration induced by large load, rational design of cable-girder anchorage is critical to long-span cable-stayed bridges. The cable-girder anchorage of the Sutong Bridge was investigated, and the mechanism of cable-girder anchorage was studied by using theoretical model and model test. The study indicated that the results of theoretical model were in accordance with that of model test, and the availability of theoretical model was demonstrated. The load transfer mechanisms of the main components of cable-girder anchorage are markedly different from each other. The stress concentration in web plate, top and bottom plate is predominant.
出处
《土木工程学报》
EI
CSCD
北大核心
2012年第7期120-126,共7页
China Civil Engineering Journal
基金
自然科学基金(50908192)
西南交通大学科技发展青年基金(2009QK03),西南交通大学“竢实之星--新世纪优秀人才后备人选培养项目”资助
关键词
钢斜拉桥
索梁锚固
锚箱式锚固结构
受力特性
理论模型
模型试验
steel cable-stayed bridge
cable-girder anchorage
box-shaped anchorage structure
mechanical feature
theoretical model
model test
