钢管混凝土抛物线空腹拱平面内轴压稳定性能研究

开发一套基于B-S架构的自主学习交流平台,为用户创造一个友好的学习交流环境。平台采用Java语言开发,通过MySql5.7对数据进行存储,依托Tomcat7.0服务器发布,最终通过浏览器展现给用户。开发过程中引入了KNN算法,可对乱填信息注册平台的用户有效拦截过滤,自主预测平台中用户的年龄结构、热门话题等信息,收集热门话题创建学习兴趣小组,并通过用户对学习资源的评价等行为的分析,对表现较好的用户给予更优质的服务与优惠,从而更好地提高平台的质量。

In-plane Axial Compression Stability of Concrete-filled Steel Tubular Parabola Vierendeel Arch

The study mainly investigated the in-plane stability of concrete-filled steel tubular parabola Vierendeel arch byadopting methods of theoretical derivation and numerical simulation.Firstly , the finite element software was used toestablish the model of concrete-filled steel tubular circular arch , which was compared with the experiment to prove the cor-rectness of the modeling method.What''s more, the exquivalent slenderness ratio of parabola vierendeel arch was deduced,and the development trend of displacement , axial forwe and bending moment of Vierendeel arch was studied.Finmall ,accord-ing to the finite element calculation results , the molified formula of stability factor considering rise span ratio was used.Itwas found that the modified formula was in good agreement with the finite element results,and can be used to guide the en-gineering design.