摘要
针对径向均布荷载工况设计了一种新型钢混复合梁截面门扇结构及其配套加工工艺。考虑了铰页的旋转约束、双门扇之间的接触、门扇和门框之间的接触作用,提出新式结构的理论计算方法和有限元仿真关键技术。之后,以实例的方式详细分析了各个环节的参数、方法、模型、指标、应力分布规律以及考虑因素,基于毁伤阈值提出防护门的薄弱部件,探究其在等效静载作用下的受力响应规律。新式门扇结构解决了传统防护门材料利用性价比低、抗弯及抗剪能力差、制造工艺繁琐等难题。基于影响规律,建议不应单纯以完全轴心受压状态的理论计算公式进行承载力校核,应在理论校核的初步验算基础上,以三维有限元的方式对门扇及其附属构件进行整体验算,考虑整体的机械协同作用。
A new type of door leaf structure with steel-concrete composite beam cross-section and its corresponding processing technology are designed for radial uniform load conditions. Taking into account the hinge rotation constraints,the contact between two door leaves and the contact between the door leaf and the door frame. the theoretical calculation method of the new structure and the key technology of finite element simulation are proposed. After that, the parameters,methods, models, indicators of each step, and stress distribution laws are analyzed in detail by way of examples. As well as considerations, the weak parts of the blast door are proposed based on the damage threshold, and the force response law under the equivalent static load is explored. New door leaf structure solves the problem of low cost-effective use of traditional protective door materials, poor bending and shear resistance, and cumbersome manufacturing processes. Based on the law of influence, it is recommended that the bearing capacity should not be checked solely by the theoretical calculation formula of the fully axial compression state. On the basis of the preliminary calculation of the theoretical check, the three-dimensional finite element method should be used. In this way, the door leaf and its auxiliary components are calculated, considering the overall mechanical synergy.
作者
彭飞
PENG Fei(China Institute of Building Standard Design and Research,Beijing 100048,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期1411-1416,共6页
Building Structure
关键词
钢混复合梁截面
防护门
有限元仿真
理论计算
响应规律
steel-concrete composite beam cross-section
blast door
finite element analysis
theoretical check
response law
