Walk Through the Eye of a Needle

2022 ◽  
Author(s):  
Dan Fitzwilliam
Keyword(s):  
Design Process ◽  
Suspension Bridge ◽  
Lessons Learned ◽  
Full Measure ◽  
Bridge Design ◽  
Pedestrian Bridge ◽  
Current Design ◽  
Design Software ◽  
Design And Testing

<p>Pedestrian bridge design is becoming more demanding and challenging as architects and engineers utilize the full measure of design ability available with current design software. This presentation will review the design process for the more unique aspects of this suspension bridge. The presentation will conclude with lessons learned during the design process. Observations from the design of this bridge will form the basis of recommendations for the enhanced design and testing specifications for cable supported bridges.</p>

Fatigue Testing of Cables – Issues and Lessons Learned

2021 ◽  
Author(s):  
Jeremy Lahaye ◽  
Dan Fitzwilliam
Keyword(s):  
Fatigue Testing ◽  
Suspension Bridge ◽  
Lessons Learned ◽  
Bridge Design ◽  
Cable System ◽  
Pedestrian Bridge ◽  
Main Cable ◽  
Pedestrian Bridges ◽  
Cable Systems ◽  
Scioto River

<p>Pedestrian bridge design is becoming more demanding and challenging as architects create new ways to experience bridges. This is particularly evident in the design of cable supported pedestrian structures.</p><p>Innovative and creative concepts require a higher level of fatigue testing to verify cable systems meet design demands and reach service design life.</p><p>The Scioto River Pedestrian Bridge is one such example of innovative pedestrian bridge design. The structure is a suspension bridge with a non-redundant main cable system. Cable supported pedestrian bridges have demonstrated a proclivity for fatigue issues in the past. To address this concern, refined fatigue testing requirements were developed which were intended to verify that the cable system and manufacturing quality control were fit for the unique structure demands. The lessons learned through the process of design, testing, and construction of the cables on this project are useful tools for teams seeking to successfully deliver future cable supported bridge projects.</p>

A Golden Ratio for Shaping the Curve – Lessons Learned

2021 ◽  
Author(s):  
Michel Schreinemachers ◽  
Wiebe Strick
Keyword(s):  
Case Studies ◽  
Design Process ◽  
Parametric Design ◽  
Golden Ratio ◽  
Design Principles ◽  
Lessons Learned ◽  
Bridge Design ◽  
Curved Bridges ◽  
The Way

<p>Can we establish the guidelines that make our designs into a success? Is there something like the Golden Ratio for shaping the curve? The Golden Ratio is a common mathematical ratio found in nature, which can be used to create pleasing, organic-looking compositions. This is used for the overall shape and proportions in bridge design. In our practice and in modern-day bridge design we see more and more curved bridges.</p><p>Especially with the rise of parametric design a whole world opened up for (more) complex curved designs. Curviness (either vertical, horizontal or both) is not just a nice aesthetic feature. We encounter design principles that need to be taken into account to get to the ultimate elegancy that we thrive for in our bridge design.</p><p>In our practice, shaping the curve of a bridge is a recurrent topic in the design process – from concept to realisation. From the forming of the (3D) <i>alignment, </i>it’s about how curves fluidly connect. It’s all about the radius, diameter, arcs, splines, offsets and the way to connect with tangents and sinusoids. This is best shown by the Lucky Knot and the Zaligebrug by NEXT architects. We also experienced the difficulties during construction phase and learned to control dealing with the unexpected.</p><p>With a series of case studies from our own bridges we show the importance of precision in shaping curves to make a design that is both natural and understandable to the eye of the user. If done right, curves seem logic and right; but if done improperly, it ends up as a disaster.</p>

Study on Tensile Strains in Concrete Bridge Girders

2013 ◽  
Vol 336-338 ◽  
pp. 309-312
Author(s):  
Yi Xi Yang
Keyword(s):  
Reinforced Concrete ◽  
Design Process ◽  
Lessons Learned ◽  
Concrete Bridges ◽  
Bridge Girders ◽  
Concrete Bridge ◽  
Design Constraints ◽  
Reinforced Concrete Bridges ◽  
Transducer Design ◽  
Design And Testing

In this paper, we present the design and testing of a simple yet accurate transducer for measuring strain in reinforced concrete bridges. Lessons learned from two earlier versions of the transducer, the first of which was incorporated into the design constraints and criteria. The following sections present the transducer design process, review the calibration and lab testing of the transducer prototype, and summarize the transducer performance in the field.

Study on a Knowledge-Reuse-Based Rapid Product Design Process

2008 ◽  
Vol 392-394 ◽  
pp. 543-550 ◽  
Author(s):  
Hun Guo ◽  
Guo Xing Tang ◽  
Dun Wen Zuo ◽  
T.J. Liu ◽  
W.D. Jin
Keyword(s):  
Product Design ◽  
Design Process ◽  
Iterative Process ◽  
Process Model ◽  
Design Reuse ◽  
Knowledge Reuse ◽  
Construction Machinery ◽  
Current Design ◽  
Product Design Process ◽  
Three Factor

Design reuse is the application of past designs knowledge and successful experience to current design process and it is a significant method for rapid design. A knowledge-reuse-based rapid product design model is proposed and a three-factor product design iterative process model is studied. Finally, it is applied successfully in the rapid product design of construction machinery combining with the requirement of the construct machinery product design.

Frances Appleton Pedestrian Bridge Design and Construction

2021 ◽  
Author(s):  
Miguel Rosales
Keyword(s):  
Americans With Disabilities Act ◽  
Bridge Design ◽  
Arch Bridge ◽  
Pedestrian Bridge ◽  
Historic Landmark ◽  
First Americans ◽  
Main Arch ◽  
Design And Construction

<p>The Frances Appleton Pedestrian Bridge is an innovative steel arch bridge with a 69m main span and curvilinear approaches along the Charles River in Boston, Massachusetts. It is the first Americans with Disabilities Act fully accessible 4.3m wide bridge connecting Boston’s historic Beacon Hill neighborhood to the Esplanade Park and Charles River. An overall architectural and structural theme was followed in the design of all bridge components including the main arch, Y shaped approach piers, circular stairs and curved ramps. The bridge is light, elegant and well-integrated into the landscape complementing an adjacent historic landmark bridge and seamlessly blending into the waterfront context.</p>

Parametric bridge design – reinforcement design

2021 ◽  
Author(s):  
Jaroslav Navrátil ◽  
Petr Ševčík ◽  
Johann Stampler ◽  
Gregor Strekelj
Keyword(s):  
Construction Industry ◽  
Design Process ◽  
Prestressed Concrete ◽  
Planning Process ◽  
Analysis Model ◽  
Bridge Design ◽  
Proof Checking ◽  
Challenging Tasks ◽  
Stress States ◽  
Reinforcement Design

<p>Using BIM technology for the design process in the construction industry has become somewhat of a standard approach. For bridge design, various solutions offering geometric design functionality and data management facilities are available on the market. However, integrated solutions for seamlessly supporting the whole planning process are still a scarce commodity. The solution presented integrates architectural modeling, structural analysis, and sophisticated proof checking functionality in one package, where, based on a 4D architectural model, an analysis model is automatically derived, allowing for simulating the erection process in detail and investigating all relevant stress states. The focus of the paper is the reinforcement design of prestressed concrete sections, which is one of the most challenging tasks among the various requirements arising in the design process.</p>

scholarly journals Ensuring the aerodynamic stability of the long-span bridges through studies in the wind tunnel

2018 ◽  
Vol 245 ◽  
pp. 02001 ◽  
Author(s):  
Evgenii Khrapunov ◽  
Sergei Solovev
Keyword(s):  
Wind Tunnel ◽  
Design Process ◽  
Aerodynamic Characteristics ◽  
Elastic Instability ◽  
Experimental Facility ◽  
Bridge Design ◽  
Aerodynamic Stability ◽  
Long Span Bridges ◽  
Long Span ◽  
Main Ideas

The main ideas of the aerodynamic studies of large bridges are presented in present paper. Main types of aero-elastic instability for bridges with spans over 100 meters are considered. A two-step modeling approach is presented. At the first stage, the aerodynamic characteristics of the span fragment are considered, at the second.stage the characteristics of the whole bridge. Methods for investigation of bridge oscillations in a special-purpose experimental facility – the Landscape Wind Tunnel – are described. Examples of tests with elastic similar models of bridges are given, and measurements to mitigate dangerous oscillations early in the bridge design process are described.

scholarly journals Creating a Virtual Leader Development Course Using the Design Thinking Process for Innovation

2021 ◽  
Author(s):  
John Hinck ◽  
Steven Davis ◽  
Justin Longmire ◽  
JB Byrnes
Keyword(s):  
Action Research ◽  
Research Methods ◽  
Design Process ◽  
Design Thinking ◽  
Leader Development ◽  
Lessons Learned ◽  
Theory And Practice ◽  
Multiple Cycles ◽  
Thinking Process ◽  
Development Course

This paper examines how a U.S. Air Force (USAF) faculty team reimagined and redesigned an in-person Leader Development Course (LDC) to a virtual version (vLDC). Using the Design Thinking Process for Innovation (DTPI) and action research methods, a new, virtual course was imagined, designed, tested, and improved over a six-cycle-process. Data was collected via multiple sources from 121 participants (19 faculty/staff and 102 students) and analyzed using manual coding and NVivo Software. Results are organized into 22 categories under four themes (general course design, student experience, instructor experience and faculty development, and technology experience) showing a progressive refinement with key lessons learned that led to the final creation of the new virtual course. Of the five key features in action research (actions matter, context-specific research, multiple cycles and phases, inclusion of people as research target, and reflections), participants reported that multiple cycles and reflections were most important in relation to the DTPI so that change could be enacted that reflected participant voices in the design process of the virtual course. The application of the DTPI using action research methods produced results and lessons learned in the design process that contribute to the theory and practice on developing and teaching in a virtual learning environment. The study fills a gap in the scholarly field and informs other institutions on the process, failures, and successes of course redesign to a virtual version.Keywords: design thinking process for innovation, action research, USAF, leader development

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