Design of steel structures by advanced analysis

项目目标：1。开发和探索钢结构有限元分析设计方法2。评估不同类型的结构(例如管状桁架)，以确定哪些结构最大程度地受益于这种新的设计方法3。根据新的声音数据改进或调整输入参数4。为了评估系统水平的可靠性5.为了开发案例研究并将有限元分析设计的好处传播给结构工程师在本项目中，将使用ABAQUS软件建立结构的有限元模型，以符合即将到来的欧洲标准PREN 1993-1-14-通过有限元分析设计钢结构的规定。这些模型将根据现有的物理实验进行验证，并用于探索将最大限度地受益于这种新设计方法的结构的范围和类型。将评估关键输入参数，并在必要时建立新的模型，例如a。材料模型：Imperial已经开发了热轧和冷弯形钢的材料模型，并将其纳入新的欧洲代码第1-14部分，但更先进的材料模型将更具优势，这些模型是为不同钢种和制造方法量身定做的(例如，高强度钢的TMCP/QT)，以及包括缩口范围在内的全系列模型。残余应力：需要对现有数据进行审查，并生成反映现代制造方法的新数据。需要分析不同产品形态中残余应力的分布规律和统计特性。几何缺陷：对钢材中几何缺陷的补充数据的回顾和收集，以完善现行的规定。将有限元设计结果与传统设计进行比较。我们会拟备个案研究，以展示这种方法的优点，并会向资深结构工程师宣传，以尽量发挥研究的作用。这项计划的主要驱动力，是利用一种更精简、更数码化的设计方法--有限元分析设计--提高钢结构的结构效率和可持续性。其新颖性来自于这种方法从根本上背离了目前通过手工计算进行结构设计的做法。

The objectives of the project; 1. To develop and explore the method of design by FE analysis for steel structures2. To assess different types of structures (e.g. tubular trusses) to identify those that benefit to the greatest extent from this new design approach3. To improve or tailor the input parameters based on new sound data4. To assess system level reliability 5. To develop case studies and to disseminate the benefits of design by FE analysis to structural engineersIn this project, FE models of structures will be established using the software ABAQUS, in line with the provisions of the upcoming European Standard prEN 1993-1-14 - Design of steel structures by finite element analysis. The models will be validated against existing physical experiments and used to explore the range and types of structures that will benefit to the greatest extent from this new method of design.The key input parameters will be evaluated, and where necessary, new models will be established, e.g.a. Material models: Material models for hot-rolled and cold-formed steels have been developed at Imperial and incorporated into the new Eurocode part 1-14, though more advanced material modes tailored for different steel grades and manufacturing methods (e.g. TMCP/QT for high strength steels), and full-range models including the necking range, will be even more advantageous.b. Residual stresses: a review of existing data and the generation of new data to reflect modern manufacturing methods is needed. An analysis of the both the patterns and statistics of residual stresses in different product forms is neededc. Geometric imperfections: a review and collection of additional data on geometrical imperfections in steel products to refine the current provisions.Comparisons will be made between the results of design by FEA and traditional design. Case studies will be prepared to show the advantages of the approach and these will be disseminated among practising structural engineers to maximise the impact of the research.The key driver for this project is to bring improved structural efficiency and sustainability to steel structures by harnessing a more streamlined, digitally-enabled design approach - design by finite element (FE) analysis. The novelty stems from this approach being a radical departure from the current practice of design structures through hand calculations.