Proceedings of FORM 2022. Construction The Formation of Living Environment

This study examines the integration of building information modelling (BIM) technologies in operation & maintenance stage in the system of managing real estate that helps to reduce transaction costs. The approach and method are based on Digital Twin technology and Model Based System Engineering (MBSE) approach. The results of the development of a service for digital facility management and digital expertise are presented. The connection between physical and digital objects is conceptualized

Numerical modelling of additive manufacturing process for stainless steel tension testing samples

Nowadays additive manufacturing (AM) technologies including 3D printing grow rapidly and they are expected to replace conventional subtractive manufacturing technologies to some extents. During a selective laser melting (SLM) process as one of popular AM technologies for metals, large amount of heats is required to melt metal powders, and this leads to distortions and/or shrinkages of additively manufactured parts. It is useful to predict the 3D printed parts to control unwanted distortions and shrinkages before their 3D printing. This study develops a two-phase numerical modelling and simulation process of AM process for 17-4PH stainless steel and it considers the importance of post-processing and the need for calibration to achieve a high-quality printing at the end. By using this proposed AM modelling and simulation process, optimal process parameters, material properties, and topology can be obtained to ensure a part 3D printed successfully

Geotechnical state-of-the-art in Guatemala -- Ground stabilization

History provides an understanding of the present and in a way, a guide for the future. The state-of-the-art is often referred to as a snapshot of the most significant works and contributions made in a field of study; In this case the focus is on Guatemalan geotechnical engineering. This study presents a comprehensive description of the different events that impulse geotechnical engineering in Guatemala. As part of the description of the state-of-the-practice an investigation of the different human (engineers/contractors) and physical resources (laboratories/field equipment) and their capabilities are presented. An overview of the civil engineering programs is presented. Then, the advances in the graduate program in geotechnical engineering are discussed. Select comprehensive case studies are presented. Project selection was based on relevance and project\u27s interest for geotechnical engineers. Privileged data and information, such as design, construction, and performance data are presented, giving a full range of point of views of the selected projects. Selected projects include topics such as slope stabilization, ground improvement, liquefaction, deep excavations, dams, grouting and foundations. A perspective on the quality of the solutions adopted in tropical and volcanic areas is discussed. For each case study, a review of the degree at which geotechnical engineering processes were followed: subsurface investigation, analytical or computational tools, empirical relationships, field testing, and/or measurement of performance (monitoring behavior). The study concludes by identifying the lessons learned; areas of improvement and recommendations in the different fields of education, resources, and practice --Abstract, page iii

Proceedings of the 9th fib International PhD Symposium in Civil Engineering : Karlsruhe Institute of Technology (KIT), 22 - 25 July 2012, Karlsruhe, Germany

The fib International PhD Symposium in Civil Engineering is an established event in the academic calendar of doctoral students. It is held under the patronage of the International Federation for Structural Concrete (fib), one of the main international associations that disseminates knowledge about concrete and concrete structures. The 9th fib International PhD Symposium was held at the Karlsruhe Institute of Technology (KIT), Germany, from July 22 to 25, 2012

Recent Research and Developments in Cold-formed Steel Design and Construction

Golden Anniversary of the AISI Specification - The 1996 AISI Specification - A New AISI Cold-Formed Steel Design Manual - Design of Cold-Formed Steel Stiffened Elements with Multiple Longitudinal Intermediate Stiffeners - A Probablistic Examination of the Ultimate Strength of Cold-Formed Steel Elements - Effective Width of a Simple Edge-Stiffener Subjected to Stress Gradient - The Effects of Perforation Length on the Behaviour of Perforated Elements in Compression - Interaction of Flangel/Edge-Stiffened Cold-Formed Steel C-Sections - Cold-Formed Steel Flat Width Ratio Limits, d/t and d/w - Comparison of the Distortional Buckling Method for Flexural Members with Tests - Design of Thin-Walled Beams for Distortional Buckling - Comparison of Tests of Purlins With and Without Cleats - Determination of Purlin R-Factors Using a Non-Linear Analysis - Deflection Design of Cold-Formed RHS Steel Beams - Finite Element Analysis of Hollow Flange Beams with Web Stiffeners - Buckling Experiments on Hollow Flange Beams with Web Stiffeners - Flexural Strength of Cold-Formed Steel Panels Using Structural Grade 80 of A653 Steel - Experimental Research on the Behaviour of Combined Web Crippling and Bending of Steel Deck Sections - Design Models of Continuous Sandwich Panels - Structural Detailing of Openings in Sandwich Panels - Non-Linear Buckling Analysis of Thin-Walled Metal Columns - Effect of Bracing Stiffness on Buckling Strength of Cold-Formed Steel Columns - Structural Design Study on a Light- Gauge Steel Portal Frame with Cold-Formed Sigma Sections - Lower Cost Lightweight Cold-Formed Portal Frames - Strength and Stiffness Calculation Procedures for Composite Slabs - Strength of Headed Shear Studs in Cold-Formed Steel Deck - Towards a Numerical Procedure for Composite Slab Assessment - Moment Rotation Behavior for Concrete Filled SHS Column to Composite Beam Connection - Stability of Standing Seam Roof-Purlin Systems - Modeling of Cold-Formed Purlin-Sheeting Systems - Dynamic Performance of Light Gauge Steel Framed Shear Walls - Steel - The Clear Cut Alternative - Residential Applications of Cold-Formed Structural Members in Australia - A Study of the Effect of Cold Forming on the Yield Strength of Stainless Steel Type 304 - Hardness Test Approach - An Explicit Approach to Design of Stainless Steel Columns - The Strength of Partially Stiffened Stainless Steel Compression Members - Burst Strength of Type 304L Stainless Steel Tubes Subjected to Internal Pressure and External Forces - Additional Design Considerations for Bolted Connections - Shear Behavior of Self Drilling Screws Used in Low Ductility Steel - Performance of Self-Tapping Screws in Lap-Shear Metal-to-Metal Connections - Evaluation and Modelling of the Material Properties for Analysis of Cold-Formed Steel Sections - The Modulus of Elasticity of Steel Is it 200 GPa? - Geometric Imperfections and Residual Stresses for Use in the Analytical Modeling of Cold-Formed Steel Members - Cold-Formed Steel Sections Experimental Data Base - Cold-Formed Steel Design by Spreadsheet Progra

Millmerran Power Station ROM coal blockage removal system

[Abstract]: Millmerran Power Station (MPS) consists of two units with each unit producing 420 MW of electricity. The coal is delivered to the plant by off road type trucks and unloaded into a 500 MT hopper. The ROM (run of mine) coal is processed through a series of crushing stations and coal handling (storage/reclaim) systems, and delivered by overland conveyor to the power plant silos. MPS, as a coal fired station, is wholly dependent on a consistent and reliable supply of coal to maintain operating efficiency. MPS has been experiencing inefficiencies in their ROM coal supply because of constant blockage issues at the receiving hopper. This blockage is a direct result of large lumps of coal coming from the mine. The blockages interrupt the supply of coal potentially lowering the fuel supply to the power station. Currently, an excavator is hired to clear up the blockage which could be utilised more effectively elsewhere. This introduces an extra cost to the mine in terms of both money and inefficiency. MPS is seeking an engineering design solution to this problem. The elimination of the blockages through an automatic system without increasing any safety risks is highly desirable as that would result in a cheaper and smoother operation of the mine. A literature review on the current coal handling system of MPS was essential in order to be able to develop a design that is suitable for MPS. In this investigation, five conceptual designs with the most appropriate design, in terms of meeting the specified criteria, was analysed and detailed. It was found that the simpler and more effective the design, the higher its practicality in terms of reaching the desired objectives. This enabled an overall cost estimate budget to be produced, which would be the major deciding factor on the implementation of the design. The results of this investigation will aid in gaining an understanding of the overall general solution for the ROM coal blockage problem at MPS. Both design and engineering solutions have been recommended in this dissertation. This will lead eventually to a more automated, safer, efficient and cost effective operating environment

Model Validation and Simulation

The Bauhaus Summer School series provides an international forum for an exchange of methods and skills related to the interaction between different disciplines of modern engineering science. The 2012 civil engineering course was held in August over two weeks at Bauhaus-Universität Weimar. The overall aim was the exchange of research and modern scientific approaches in the field of model validation and simulation between well-known experts acting as lecturers and active students. Besides these educational intentions the social and cultural component of the meeting has been in the focus. 48 graduate and doctoral students from 20 different countries and 22 lecturers from 12 countries attended this summer school. Among other aspects, this activity can be considered successful as it raised the sensitivity towards both the significance of research in civil engineering and the role of intercultural exchange. This volume summarizes and publishes some of the results: abstracts of key note papers presented by the experts and selected student research works. The overview reflects the quality of this summer school. Furthermore the individual contributions confirm that for active students this event has been a research forum and a special opportunity to learn from the experiences of the researchers in terms of methodology and strategies for research implementation in their current work