钢混凝土组合肋壳受力性能和失效机理研究

项目名称： 钢混凝土组合肋壳受力性能和失效机理研究

项目编号： No.51308443

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 常玉珍

作者单位： 西安建筑科技大学

项目金额： 25万元

中文摘要： 钢混凝土组合肋壳能充分利用材料性能，增强结构稳定性，提高结构抗火性和耐久性，具有广阔的应用前景。本项目采用试验研究和理论分析相结合的方法，对钢混凝土组合肋壳的受力性能和失效机理进行研究。首先，采用内外气压差和振动台对整体结构进行静、动力加载试验，对典型节点进行节点试验，初步掌握结构静、动力荷载下的力学性能。其次，基于连续化理论，利用拟壳法建立结构基本微分方程；考虑结构初始缺陷、几何材料双重非线性以及行波效应等影响要素，建立数值模型，对组合肋壳受力全过程进行数值仿真分析，并与试验结果进行比较。最后，考虑材料损伤影响，建立强震下组合肋壳损伤模型，确定结构破坏响应指标与矢跨比、跨度、截面尺寸参数的数值关系，提出适合本结构的稳定判定准则。通过试验研究和数值分析，揭示组合肋壳力学性能和失效机理，为结构优化，工程设计施工提供理论依据和设计指导，为钢筋混凝土薄壳规程修订和其他组合结构提供参考。

中文关键词： 组合肋壳结构；试验研究；理论分析；结构稳定性；强度失效

英文摘要： Steel concrete composite ribbed shell can make full use of material properties, enhance structural stability, and improve water resistance and durability, so it has a broad application prospects. The mechanical and failure mechanism will be studied by experimental research and numerical analysis in this project. Firstly, the pressure difference inside and outside is used in static loading test while vibration table in dynamic loading test, some typical node tests are made, all the above tests are made to explore the basic mechanical properties. Secondly, based on the continuous theory, the basic differential equation is established by quasi-shell method, and then the numerical model is made by considering initial imperfection, wave passage effect, geometrical and material nonlinear etc., the whole loading-deformation process is simulated. Finally, the damage model is made by considering material damage effect, the relation between damage response index and influence factors such as span-high ratio, span and section dimension is established under strong seismic,the stable criterion suitable to composite ribbed shell is proposed. The mechanical performance and failure mechanism are revealed through experimental research and numerical analysis, which can provide theoretical basis and design guidance for structure o

英文关键词： composite ribbed shell structure；experimental study；theoretic analysis；structural stability；srength failure