Design of steel structures by advanced analysis

项目目标; 1。发展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.系统可靠性评估5.为了开发案例研究并向结构工程师传播通过有限元分析进行设计的好处，在本项目中，将根据即将出台的欧洲标准prEN 1993 - 1 - 14-通过有限元分析进行钢结构设计的规定，使用软件ABAQUS建立结构的有限元模型。这些模型将根据现有的物理实验进行验证，并用于探索最大程度上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，并在必要时建立新模型，例如a。材料型号：Imperial已经开发了热轧和冷成型钢的材料模型，并将其纳入新的欧洲规范第1 - 14部分，但针对不同钢种和制造方法定制的更先进的材料模型（例如，高强度钢的TMCP/QT）以及包括缩颈范围在内的全系列模型将更加复杂。b.残余应力：需要审查现有数据并生成新数据以反映现代制造方法。需要对不同产品形式的残余应力的模式和统计进行分析。几何缺陷：审查和收集有关钢产品几何缺陷的额外数据，以完善现行规定。将有限元分析设计结果与传统设计结果进行比较。我们将准备案例研究来展示该方法的优势，并将这些案例传播给执业结构工程师，以最大限度地发挥研究的影响力。该项目的关键驱动力是通过利用更简化的数字化设计方法-有限元（FE）分析设计，为钢结构带来更高的结构效率和可持续性。新颖性源于这种方法是从根本上脱离目前的设计结构，通过手工计算的做法。

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.