树状结构铸钢分叉节点分析计算、仿生优化及试验研究

项目名称： 树状结构铸钢分叉节点分析计算、仿生优化及试验研究

项目编号： No.U1304527

项目类型： 联合基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 杜文风

作者单位： 河南大学

项目金额： 30万元

中文摘要： 树状结构呈现出广泛的应用前景，但对所采用的铸钢分叉节点基础理论方面的研究却很匮乏，工程实践中已反映出了节点优化不足、前期科研试验投入过高、无规范规程可参考等共性问题。本项目拟综合运用理论分析、有限元模拟及试验研究等手段，开展树状结构铸钢分叉节点的建模、计算、仿生优化及受力性能的研究。首先，借鉴自然界中的生物节点原型，研究考虑管径、壁厚、倒角半径、加肋劲、分叉角度等因素影响的节点仿生优化策略，并建立基于计算机辅助几何学原理的铸钢分叉节点参数化数值建模方法；其次，通过大量的精细化有限元分析，考察不同参数和受荷方式时铸钢分叉节点的力学行为；再次，获得铸钢分叉节点的主要破坏模式，并建立二分叉、三分叉和四分叉三种铸钢分叉节点的承载力计算公式；最后，进行一个三分叉铸钢节点足尺模型试验。通过本项目的研究，可为提升我国铸钢分叉节点的设计分析水平提供理论基础，为相关规程的编制提供依据。

中文关键词： 树状结构；铸钢分叉节点；破坏模式；承载力计算公式；试验

英文摘要： Applications of Tree-like Structures are taking on a more widely foreground, however the Cast Steel Branch Joints used in Tree-like Structures are not studied detailed enough. Some problems have been proposed in engineering practice such as shortage of optimization, a large amount of money spent in experiments, no codes to use and so on. Sometimes they may be the technological bottlenecks of engineering completion. Therefore, the study of bionic optimization and calculation method of Cast Steel Branch Joints in Tree-like Structures will be carried on in this project. At first, we will take the biological nodes in nature as reference and propose the nodal bionic optimization statics considering many parameters such as diameter of tube, thickness of wall, radius of fillet, stifferners, angle between branches, etc. And the parameters numerical model based on Computer Aided Geometry will be set up by us too. Then, the mechanical behaviors of Cast Steel Branch Joints will be studied after a great deal of FEM analyses. Moreover, the main failure mode of Cast Steel Branch Joints will be discussed and the bearing capacity calculation formula of two-branch joints, three-branch joints and four-branch joints will be deduced. At last, a full-scale-model experiment of three-branch joints will be carried out. This study will

英文关键词： tree-like structures；the cast-steel joint with branches；failure modes；calculation formula of bearing capacity；experiment