Steel Construction-Design and Research最新文献_第7页

Enhancing structural design with a parametric FEM toolbox 用参数化有限元工具箱增强结构设计

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202200004

Diego Apellániz, R. Vierlinger

{"title":"Enhancing structural design with a parametric FEM toolbox","authors":"Diego Apellániz, R. Vierlinger","doi":"10.1002/stco.202200004","DOIUrl":"https://doi.org/10.1002/stco.202200004","url":null,"abstract":"The Parametric FEM Toolbox is a plug‐in for the visual programming environment Grasshopper which implements the RF‐COM API of the Dlubal RFEM finite element software to establish a connection between these two platforms. Both the transfer of data from Grasshopper into RFEM and back from RFEM into Grasshopper are supported. Thus, new possibilities are enabled beyond the options of the conventional graphical user interface (GUI) of RFEM: the use of the Rhino 3D modelling tools to create NURBS curves and surfaces; the possibility of the parametric modification of an existing FE model or part of it; the export and processing of FE model data, which sometimes is not even available through the program GUI, e.g. 3D shapes of beam elements; etc. With these functionalities, the object‐oriented structure and compact GUI, this tool can easily be adapted to numerous workflows and optimization processes. This paper explores which possibilities exist for implementing a commercial FEM software in a parametric design platform. Existing approaches are reviewed, the development of the Parametric FEM Toolbox is described and some of the possible workflows with this new tool are explored through a collection of real‐world case studies.","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48653856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

High‐cycle variable amplitude fatigue experiments and design framework for bridge welds with high‐frequency mechanical impact treatment 高频机械冲击处理桥梁焊缝的高周变幅疲劳试验和设计框架

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202200003

Poja Shams‐Hakimi, H. Al‐Karawi, M. Al‐Emrani

引用次数: 3

Laser beam and laser‐GMAW‐hybrid welded joints made of high‐strength fine‐grained structural steels 由高强度细晶结构钢制成的激光束和激光- GMAW -混合焊接接头

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202270305

引用次数: 1

Place and date – Event – Details 地点和日期-事件-详细信息

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202270307

引用次数: 0

Low‐damage steel structures for enhanced life‐cycle seismic performance 低损伤钢结构提高寿命周期抗震性能

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202270303

{"title":"Low‐damage steel structures for enhanced life‐cycle seismic performance","authors":"","doi":"10.1002/stco.202270303","DOIUrl":"https://doi.org/10.1002/stco.202270303","url":null,"abstract":"During an earthquake, steel frame buildings with bracings are prone to high absolute floor acceleration demands, thereby causing damage to acceleration-sensitive non-structural elements and building content. Inelastic deformations in steel bracings and/or their end connections often necessitate the use of capacity design rules to meet the life safety requirements established by seismic design standards. This paper presents an alternative steel frame building configuration where energy dissipation is mostly achieved through friction dampers acting as dissipative connectors between the floor diaphragms and the steel frame(s) with bracings. The dampers consist of friction pads made from composite materials which are not susceptible to galvanic corrosion. Physical experiments suggest that the friction pads are effective in dissipating the seismic energy through friction. Nonlinear response history analyses of a prototype 6-storey steel frame building featuring friction dampers as dissipative floor connectors demonstrate that a) higher mode effects are mitigated; b) capacity-design in the steel frame(s) with bracings is not imperative to ensure a uniform lateral drift distribution; and c) the seismic response variability in storey-based engineering demand parameters is reduced remarkably compared with that of the conventional counterpart with rigid diaphragms. All-inall, the alternative building configuration has high potential to minimize earthquake-induced repairs over a building’s service life.","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49165039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

News: Steel Construction 3/2022 新闻:钢结构3/2022

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202270306

引用次数: 0

Preview 4/22 预览4/22

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202270308

引用次数: 0

3D printed columns with exceptional geometry 具有特殊几何形状的3D打印柱

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202270304

{"title":"3D printed columns with exceptional geometry","authors":"","doi":"10.1002/stco.202270304","DOIUrl":"https://doi.org/10.1002/stco.202270304","url":null,"abstract":"Wire Arc Additive Manufacturing (WAAM) is a welding process used to build up three-dimensional structures in steel. Like other Additive Manufacturing technologies, it allows for geometricallyexceptional structures to be fabricated which are otherwise unfeasible or very expensive to manufacture using traditional methods. This paper presents an integrated design approach to the use of WAAM in the context of large scaled applications, focusing on columns with exceptional geometric complexity. It combines material behaviour and process parameter research, with the aim of providing a digital tool to design and print structures using WAAM. To achieve the desired geometries, necessary welding parameters are stored and applied to a rudimentary digital twin model. This is complimented by multiple process-control checks, which are implemented during the printing process to ensure that an object is generated as planned. Finally, the structures are manufactured and are subjected to a critical evaluation in order to identify the possible future potential. The challenge of combining geometric complexity with manufacturing for large scale represents a next step in the integration of WAAM in steel constructions. Lange, J.; Waldschmitt, B.; Costanzi, C. B. (2022) 3D-gedruckte Stützen mit außergewöhnlicher Geometrie. Stahlbau 91, H. 6, S. 365–374. https://doi. org/10.1002/stab.202200020 3D printed columns with exceptional geometry E D I T O R ’ S R E C O M M E N D A T I O N","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48988628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Content: Steel Construction 3/22 内容：钢结构3/22

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-08-01 DOI: 10.1002/stco.202270302

引用次数: 0

Damage criterion approach to high‐strength steel RHS truss joints 高强钢RHS特拉斯节点的损伤准则探讨

IF 1.6

Steel Construction-Design and Research Pub Date : 2022-07-15 DOI: 10.1002/stco.202100027

Meera Mohan, T. Wilkinson

{"title":"Damage criterion approach to high‐strength steel RHS truss joints","authors":"Meera Mohan, T. Wilkinson","doi":"10.1002/stco.202100027","DOIUrl":"https://doi.org/10.1002/stco.202100027","url":null,"abstract":"This paper describes finite element simulations of the structural deformation and material fracture behaviour of high‐strength steel RHS K gap truss joints. The fundamental scope was to examine whether the joint strength predictions based on the behaviour of lower strength and more ductile steel with a yield stress of 355 MPa or less would hold good for higher strength 450 MPa steel with a lower ductility. The FEA reliability analysis indicates that for failure modes associated with local buckling, yielding and deformation (chord side wall failure, chord face plastification and brace failures due to reduced effective width), the existing approach could, with modifications, be extended to cover higher strength tubes, but for failure modes associated with fracture or ductility or modes liable to brittle failure (tearing in the tension brace and chord punching shear), a strength reduction modifying factor was required. The finite element simulations incorporated a damage mechanics approach to calibrate experimental results in both the fracture and deformation modes of failure. The paper proposes a new formulation for strength and incorporates reduced ductility in high‐grade steel with a modifier function that is not based on yield stress, instead recognizes the reduced ultimate strains, damage parameter for fracture and ultimate stress of the material.","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46993691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1