Academic literature on the topic 'Trusses – Testing'

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Journal articles on the topic "Trusses – Testing"

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Karacabeyli, Erol, Conroy Lum, and Link Olson. "Strength and stiffness of glulam trusses with punched metal plated joints." Canadian Journal of Civil Engineering 20, no. 4 (1993): 622–30. http://dx.doi.org/10.1139/l93-079.

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Several Canadian wood truss manufacturers expressed a need to develop technical information to initiate the fabrication and acceptance of wood trusses made with glued-laminated timber (glulam) members and connected by punched metal plates. In collaboration with industrial participants, Forintek Canada Corp. developed a program for testing and analysis of metal plated glulam trusses. Twelve 3/12 pitched chord trusses and three parallel chord trusses, all 13.7 m long, were designed by three different plate manufacturers. All truss fabrication took place at a single truss manufacturing plant. Tru
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Frater, George S., and Jeffrey A. Packer. "Modelling of hollow structural section trusses." Canadian Journal of Civil Engineering 19, no. 6 (1992): 947–59. http://dx.doi.org/10.1139/l92-113.

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It has been recently advocated that a practical static design of hollow structural section (HSS) Warren and Pratt trusses, having either gapped or overlapped connections, can be performed on the basis of a force distribution obtained from an elastic analysis of the truss with either all the members pin-jointed or the web members pin-jointed to continuous chord members. However, at the service load level, gap-connected truss deflections have been previously underestimated by around 12%–15%. Laboratory testing of HSS trusses has accordingly been undertaken to establish experimental axial force a
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Xia, Ying. "Research of Static Load Testing Program of Reinforced Concrete Truss Scheme." Applied Mechanics and Materials 443 (October 2013): 110–13. http://dx.doi.org/10.4028/www.scientific.net/amm.443.110.

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In order to ensure the safety of the truss, truss structure should be carried out prior to use static loading test for assessing the actual working conditions as well as the truss trusses meet the design. The static load test site carries out the testing work. In this paper loaded static load test program was designed to include load cases and measuring points on the truss static load test a theoretical analysis.
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Lin, Hong Yu. "Static Performance Analysis on Combined Truss with Steel Tube and Concrete-Filled Steel Tube Based on Total Strain Crack Constitutive Model." Advanced Materials Research 311-313 (August 2011): 1884–88. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1884.

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Based on the total strain crack constitutive model and the available testing data, finite element model on three trusses were established by the finite element procedure MIDAS/FEA and the analysis were executed in order to verify the validity of constitutive model and study the static performance of combined truss. The results show that the finite element model based on total strain crack constitutive can reflect the static performance of combined truss and can carry the affective parameters analysis, which can offer theory evidence for engineering application of combined truss. The failure of
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Samir, Peter, and George Morcous. "Precast Prestressed Concrete Truss-Girder for Roof Applications." Journal of Structures 2014 (December 14, 2014): 1–13. http://dx.doi.org/10.1155/2014/524156.

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Steel trusses are the most popular system for supporting long-span roofs in commercial buildings, such as warehouses and aircraft hangars. There are several advantages of steel trusses, such as lightweight, ease of handling and erection, and geometric flexibility. However, they have some drawbacks, such as high material and maintenance cost, and low fire resistance. In this paper, a precast concrete truss is proposed as an alternative to steel trusses for spans up to 48 m (160 ft) without intermediate supports. The proposed design is easy to produce and has lower construction and maintenance c
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McEachen, Michael E. "Validation of Slender Lattice Trusses by Modeling and Testing." Journal of Spacecraft and Rockets 49, no. 6 (2012): 970–77. http://dx.doi.org/10.2514/1.51301.

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Rice, Jennifer A., Douglas A. Foutch, James M. LaFave, and Schaun Valdovinos. "Field testing and analysis of aluminum highway sign trusses." Engineering Structures 34 (January 2012): 173–86. http://dx.doi.org/10.1016/j.engstruct.2011.09.021.

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Bonopera, Marco, Kuo-Chun Chang, Chun-Chung Chen, Tzu-Kang Lin, and Nerio Tullini. "Bending tests for the structural safety assessment of space truss members." International Journal of Space Structures 33, no. 3-4 (2018): 138–49. http://dx.doi.org/10.1177/0266351118804123.

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This article compares two nondestructive static methods used for the axial load assessment in prismatic beam-columns of space trusses. Examples include the struts and ties or the tension chords and diagonal braces of steel pipe racks or roof trusses. The first method requires knowledge of the beam-column’s flexural rigidity under investigation, whereas the second requires knowledge of the corresponding Euler buckling load. In both procedures, short-term flexural displacements must be measured at the given cross sections along the beam-column under examination and subjected to an additional tra
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Salinas, J. J., R. G. Gillard, and K. C. McMartin. "Strength and structural safety of long-span light wood roof trusses. Reliability analysis using safety index." Canadian Journal of Civil Engineering 12, no. 1 (1985): 114–25. http://dx.doi.org/10.1139/l85-012.

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The results of the full-scale testing, previously carried out, of 75 light wood trusses are analysed to evaluate their compliance with strength and serviceability requirements. Size effects were studied considering span length and chord size. Test data were grouped into 15 case studies according to span lengths, chord size, and mode of failure. For the study of a strength limit state, the safety index, β, was calculated for a range of values of the ratio of maximum lifetime to nominal snow load. For the study of a serviceability limit state, the safety index was calculated for a range of value
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Lau, Peter W. C. "Factors affecting the behaviour and modelling of toothed metal-plate joints." Canadian Journal of Civil Engineering 14, no. 2 (1987): 183–95. http://dx.doi.org/10.1139/l87-030.

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An efficient approach to determine the behaviour of toothed metal-plate joints is to use analytical techniques to model the behaviour on the basis of known properties of plate and wood, and loading conditions, backed by an actual testing of the joints for verification or calibration of the models. Existing computer-based techniques such as the Structural analysis of trusses (SAT) and Purdue plane stress analyzer II (PPSA II) were developed for modelling wood trusses. The applicability and usefulness of these techniques can be expanded if better joint models can be incorporated into SAT, or if
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Dissertations / Theses on the topic "Trusses – Testing"

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Bauer, Dominique. "Triangular trusses fabricated from rectangular hollow sections." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75364.

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This thesis deals with the behaviour and design of triangular trusses fabricated from Hollow Structural Sections (HSS), with two Warren-type web planes and a single tension chord. Experimental programs are described in which triangular truss segments and simplified joints were tested in order to investigate the behaviour of compression web members and tension-chord welded joints. The mechanics of joint deformations are analysed in relation to the yield line theory, and simple models are shown to give a good prediction of the joint stiffnesses and strengths. Complex yield line models are invest
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Mwakali, Jackson Aarali. "The collapse behaviour of double-layer space trusses incorporating eccentrically loaded tee-section members." Thesis, University of Surrey, 1990. http://epubs.surrey.ac.uk/756/.

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Radhakrishnan, Perumal. "Post-buckled performance of partially restrained and intermediately supported steel angles." PDXScholar, 1986. https://pdxscholar.library.pdx.edu/open_access_etds/3609.

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The post-buckled performance of cross-braced single angles was experimentally determined. The results of this study will be used by the Bonneville Power Administration for the analysis of member performance in transmission towers.
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Ziemba, Gilead Reed. "Theoretical analysis of light-weight truss construction in fire conditions, including the use of fire-retardant-treatment wood." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-050506-114556/.

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Richardson, Sarah. "In-Situ Testing of a Carbon/Epoxy IsoTruss Reinforced Concrete Foundation Pile." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1280.pdf.

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Sparks, S. Nicholas. "Testing of Overhead Box Truss Chords and Flanges." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493809504770442.

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Andberg, Brent K. "Modal testing and analysis of the NPS Space Truss." Thesis, Monterey, California. Naval Postgraduate School, 1997. http://hdl.handle.net/10945/8683.

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Approved for public release; distribution is unlimited<br>This thesis deals with modal testing and analysis of the Naval Postgraduate School (NPS) Space Truss. A finite element model (FEM) was developed for the truss using a MATLB program called NRLFEMI (developed at the Nava1 Research Laboratory). Analytical predictions of the natural frequencies for this 3.76 meter by 0.35 meter precision structure were calculated using the NRLFEMI code. These calculated natural frequencies were then compared to experimental data collected during modal testing of the truss in the NPS dynamics and Control Lab
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Hedric, Andrew C. "Dynamic Behaviors of Historical Wrought Iron Truss Bridges – a Field Testing Case Study." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc822751/.

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Civil infrastructure throughout the world serves as main arteries for commerce and transportation, commonly forming the backbone of many societies. Bridges have been and remain a crucial part of the success of these civil networks. However, the crucial elements have been built over centuries and have been subject to generations of use. Many current bridges have outlived their intended service life or have been retrofitted to carry additional loads over their original design. A large number of these historic bridges are still in everyday use and their condition needs to be monitored for public
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Saarimäki, Jonas. "The mechanical properties of lattice truss tructures with loadbearing shells made of selectively laser melted Hastelloy X (TM)." Thesis, KTH, Industriell produktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-41320.

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This thesis discusses how to test the mechanical properties of openlattice truss structures and hybrids being a tube containing a latticetruss structure. By properties we mean strength, stiffness, thermalconductivity and so forth.Mechanical testing was done on two different structures to betterunderstand how the load-bearing properties change when these structuresare subjected to tensile, compressive and bending forces. The structuresinvestigated were Diamond and Octagon built at 45° and 90°. Acousticemission was also used to evaluate and analyze the different behaviour ofthe structures. The t
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Santos, Cody Joshua. "Dynamic Testing for a Steel Truss Bridge for the Long Term Bridge Performance Program." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/894.

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Under the direction of the Federal Highway Administration the Long Term Bridge Performance Program (LTBP) selected Minnesota Bridge number 5718 as a pilot bridge for evaluation. This program focuses on the monitoring of bridges for a 20-year period to understand the structural behavior over time due to the various loads and weathering. In monitoring this bridge a better understanding can be acquired for the maintenance issues related to the nation's deteriorating bridge infrastructure. Bridge Number 5718, which is located just outside of Sandstone Minnesota, is a steel truss bridge that span
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Books on the topic "Trusses – Testing"

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Collins, Timothy J. Structural analysis and testing of an erectable truss for precision segmented reflector application. NASA Langley Research Center, 1995.

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Woldegiorgis, Berhanu F. Some behavioural aspects of composite trusses. Dept. of Civil Engineering, University of Alberta, 1994.

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Wolfe, Ronald W. Experimental assessment of wood trusses with square-end webs. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1996.

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Maurer, Michael B. Shrinkage and flexural tests of a full-scale composite truss. Dept. of Civil Engineering, University of Alberta, 1994.

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Blümel, Steffen. Ein Beitrag zum Trag- und Verformungsverhalten von Fachwerkträgern aus hochfesten Abkantprofilen. Vdf Hochschulverlag AG an der ETH, 2003.

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Issa, Mohsen A. Structural evaluation procedures for heavy wood truss structures. US Army Corps of Engineers, Construction Engineering Research Laboratories, 1998.

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Chen, Simon A. A shear-friction truss model for reinforced concrete beams subjected to shear. Dept. of Civil Engineering, University of Alberta, 1993.

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W, White Charles. Dynamic testing of a two-dimensional box truss beam. Langley Research Center, 1987.

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Andberg, Brent K. Modal testing and analysis of the NPS Space Truss. Naval Postgraduate School, 1997.

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Brown, Kyle N. Nondiscrimination testing and permitted disparity in qualified retirement plans. Tax Management Inc., 2001.

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Book chapters on the topic "Trusses – Testing"

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Larsen, Kim G., Axel Legay, Marius Mikučionis, Brian Nielsen, and Ulrik Nyman. "Compositional Testing of Real-Time Systems." In ModelEd, TestEd, TrustEd. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68270-9_6.

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Salmani, Hassan. "Trusted Testing Techniques for Hardware Trojan Detection." In Trusted Digital Circuits. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-79081-7_8.

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Bainczyk, Alexander, Alexander Schieweck, Bernhard Steffen, and Falk Howar. "Model-Based Testing Without Models: The TodoMVC Case Study." In ModelEd, TestEd, TrustEd. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68270-9_7.

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Brandán Briones, Laura, and Agnes Madalinski. "Diagnosis and Testing: How is Their Relation? Can They Be Combined?" In ModelEd, TestEd, TrustEd. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68270-9_8.

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Fernstrom, Eric V., Tim R. Wank, and Kirk A. Grimmelsman. "Dynamic Testing of a Truss Bridge Using a Vibroseis Truck." In Topics on the Dynamics of Civil Structures, Volume 1. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-2413-0_16.

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Matei, Alexander, and Stefan Ulbrich. "Detection of Model Uncertainty in the Dynamic Linear-Elastic Model of Vibrations in a Truss." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77256-7_22.

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AbstractDynamic processes have always been of profound interest for scientists and engineers alike. Often, the mathematical models used to describe and predict time-variant phenomena are uncertain in the sense that governing relations between model parameters, state variables and the time domain are incomplete. In this paper we adopt a recently proposed algorithm for the detection of model uncertainty and apply it to dynamic models. This algorithm combines parameter estimation, optimum experimental design and classical hypothesis testing within a probabilistic frequentist framework. The best setup of an experiment is defined by optimal sensor positions and optimal input configurations which both are the solution of a PDE-constrained optimization problem. The data collected by this optimized experiment then leads to variance-minimal parameter estimates. We develop efficient adjoint-based methods to solve this optimization problem with SQP-type solvers. The crucial test which a model has to pass is conducted over the claimed true values of the model parameters which are estimated from pairwise distinct data sets. For this hypothesis test, we divide the data into k equally-sized parts and follow a k-fold cross-validation procedure. We demonstrate the usefulness of our approach in simulated experiments with a vibrating linear-elastic truss.
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Brouder, Sylvie M., Jeffrey J. Volenec, and T. Scott Murrell. "The Potassium Cycle and Its Relationship to Recommendation Development." In Improving Potassium Recommendations for Agricultural Crops. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59197-7_1.

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AbstractNutrient recommendation frameworks are underpinned by scientific understanding of how nutrients cycle within timespans relevant to management decision-making. A trusted potassium (K) recommendation is comprehensive enough in its components to represent important differences in biophysical and socioeconomic contexts but simple and transparent enough for logical, practical use. Here we examine a novel six soil-pool representation of the K cycle and explore the extent to which existing recommendation frameworks represent key plant, soil, input, and loss pools and the flux processes among these pools. Past limitations identified include inconsistent use of terminology, misperceptions of the universal importance and broad application of a single soil testing diagnostic, and insufficient correlation/calibration research to robustly characterize the probability and magnitude of crop response to fertilizer additions across agroecozones. Important opportunities to advance K fertility science range from developing a better understanding of the mode of action of diagnostics through use in multivariate field trials to the use of mechanistic models and systematic reviews to rigorously synthesize disparate field studies and identify knowledge gaps and/or novel targets for diagnostic development. Finally, advancing evidence-based K management requires better use of legacy and newly collected data and harnessing emerging data science tools and e-infrastructure to expand global collaborations and accelerate innovation.
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Bartoli, Gianni, Michele Betti, Saverio Giordano, and Maurizio Orlando. "In-Situ Static and Dynamic Testing and Numerical Modelling of the Dome of the Siena Cathedral (Italy)." In Handbook of Research on Seismic Assessment and Rehabilitation of Historic Structures. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8286-3.ch004.

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The chapter reports on the in-situ experimental campaign and the numerical modelling that were performed to assess the static and dynamic behaviour of the Cupola of the Siena Cathedral in Italy: an irregular polygonal masonry structure built in the 13th century and composed of two domes. The research was motivated by the failure of some of the stone-trusses which connect the two masonry domes and consists of: a) single and double flat-jack tests in the internal dome, b) dynamic vibration tests on the Cupola under environmental (wind) and artificial (vibrodyne) loads and c) dynamic vibration tests on the double colonnade located below the Cupola (hammer impact tests). Results of tests were employed to identify a numerical model of the Cupola, which allowed to simulate its structural behaviour and to account for the failure of the stone-trusses between the two domes. The numerical model was later extended to the whole Cathedral. Through the discussion of an emblematic case study, the chapter shows a careful application of non-destructive testing (NDT) and numerical modelling in the field of assessment (and rehabilitation) of heritage buildings.
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Gentile, C. "Full-Scale Testing and System Identification of a Steel-Trussed Bridge." In Structural Engineering, Mechanics and Computation. Elsevier, 2001. http://dx.doi.org/10.1016/b978-008043948-8/50063-1.

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Vaugh, Rayford B. "High Assurance Products in IT Security." In Information Security and Ethics. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59904-937-3.ch104.

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Corporate decisions concerning the purchase of security software and hardware appliances are often made based simply on the recommendations of the technical staff, the budget process (return on investment arguments), and/or a sales presentation and assertions. This chapter addresses the notion of trusted products and assurance in those products (i.e., confidence in the correct operation of a product) and how assurance is gained through independent review and testing. Early attempts to measure assurance in trusted products are described (some products today still refer to these procedures). Modern approaches to measuring assurance will be discussed in the context of ISO Standard 15408 (the Common Criteria (CC)). Current U.S. federal government policy concerning the use of evaluated products is presented, as well as a discussion of why industrial organizations may wish to consider such products.
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Conference papers on the topic "Trusses – Testing"

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Szaroletta, William K. "Integrating Optimal Truss Design Methodologies Into Mechanical Engineering Technology." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33960.

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The author has previously shown that single criterion optimization methodologies can be effectively integrated into lower-division mechanical engineering technology courses using single beam elements and a variety of load cases. In that paper, multiple methodologies of varying beam cross-section to minimize weight of the beam or to approach a constant stress state in the beam were described and their use investigated. This paper describes the application of these single criterion optimization methodologies to multiple-part assemblies, specifically engineering trusses. Although the optimization
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Pontecorvo, Michael E., Silvestro Barbarino, Farhan S. Gandhi, Scott Bland, Robert Snyder, and Jay Kudva. "Impact Load Mitigation With Bi-Stable von-Mises Trusses." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3061.

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This paper examines the potential of a bi-stable von-Mises truss (VMT) connected to viscous damping elements in absorbing impact loads, and reducing loads and accelerations transmitted to the base. A compact sandwich-panel-like element is designed, fabricated and tested in an impact testing machine which comprises of a top plate, a bottom plate, and VMTs in-between that stroke the dashpot as they snap through. The loads transmitted to the bottom plate showed reductions of over 70% for lower drop heights, while reductions approaching 50% were seen for larger drop heights. The introduction of pr
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Pachón, Pablo, Enrique García, Víctor Compán, Javier F. Jiménez-Alonso, and Rafael Castro. "Ambient Vibration Testing, Dynamic Identification and Model Updating of a historical bridge." In IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.0152.

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&lt;p&gt;The proper maintenance of bridges is nowadays fundamental and unavoidable. These structures have to be preserved and technical works are usually essential to ensure its correct preservation. In this respect, it is common to use the finite element method as a numerical technique to assess the structural behaviour of this type of structure. However, when it comes time to face a historical construction, it is well known the high level of uncertainty surrounding the definition of the parameters that characterize it. Material properties, connections between structural parts or construction
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Ganapathi, Gani, Arthur Palisoc, Armin Buchroithner, et al. "Development and Prototype Testing of Low-Cost Lightweight Thin Film Solar Concentrator." In ASME 2016 10th International Conference on Energy Sustainability collocated with the ASME 2016 Power Conference and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/es2016-59692.

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A low-cost rigid foam-based concentrator technology development program was funded by the DOE SunShot Initiative to meet installed cost goals of $75/m2 vs. current costs of ∼ $200–250/m2. Phase 1 of the project focused on design trades and cost analyses leading to a cost-optimized self-powered autonomous tracking heliostat concept with a mirror surface area in the 100m2 range. In Phase 2 30-year accelerated testing of the mirror modules based on ReflecTec film with 94% specular reflectivity bonded on composite foam substrate were initiated and completed in Phase 3. The tests with 15 coupons sh
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Lu, Xiao-li, Yun-wei Dong, and Chao Luo. "Testing of Component-Based Software: A Metamorphic Testing Methodology." In Trusted Computing (UIC/ATC). IEEE, 2010. http://dx.doi.org/10.1109/uic-atc.2010.75.

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Pontecorvo, Michael E., Silvestro Barbarino, Farhan S. Gandhi, Scott Bland, Robert Snyder, and Jay Kudva. "A Load-Bearing Structural Element With Energy Dissipation Capability Under Harmonic Excitation." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3060.

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This paper focuses on the design, fabrication, testing and analysis of a novel load-bearing element with good energy dissipation capability over a decade of variation in frequency and harmonic load amplitude. A single layer of the compact sandwiched-plate-like element is comprised of two von-Mises trusses (VMTs) between an upper and lower plate, connected to two dampers which stroke in the in-plane direction as the VMTs cycle between the two stable equilibrium states. The elements can be assembled in-plane to form a large plate-like structure or stacked with different properties in each layer
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Srivastava, Ashok, and Rajiv Soundararajan. "Testing of Trusted CMOS Data Converters." In 2012 IEEE Computer Society Annual Symposium on VLSI (ISVLSI). IEEE, 2012. http://dx.doi.org/10.1109/isvlsi.2012.23.

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Wang, Jian, Yanheng Liu, Jing Zhang, and Yu Jiao. "Evaluating Access Terminal in Trusted Network." In 2009 IEEE Circuits and Systems International Conference on Testing and Diagnosis. IEEE, 2009. http://dx.doi.org/10.1109/cas-ictd.2009.4960815.

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Zhang, Huanguo, Jie Luo, Fei Yan, Mingdi Xu, Fan He, and Jing Zhan. "A Practical Solution to Trusted Computing Platform Testing." In 2008 Third Asia-Pacific Trusted Infrastructure Technologies Conference (APTC). IEEE, 2008. http://dx.doi.org/10.1109/aptc.2008.20.

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Rodriguez, Stephanie, Andrew Rakich, John Hill, et al. "Implementation of a laser-truss based telescope metrology system at the Large Binocular Telescope." In Optical Manufacturing and Testing XIII, edited by Rolf Rascher and Dae Wook Kim. SPIE, 2020. http://dx.doi.org/10.1117/12.2576438.

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Reports on the topic "Trusses – Testing"

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Van Benthem, Mark. Trusted materials using orthogonal testing. 2015 Annual report. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1222974.

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Malone, Brian, Mark Heffron, and J. Ramirez. Analysis and Load Testing of Two Steel Through Truss Bridges in Indiana. Purdue University, 1996. http://dx.doi.org/10.5703/1288284313146.

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Demchyna, Bohdan, and Yaroslav Shydlovskyi. Recommendations for Designing Wooden Arches on Metal-toothed Plates. Intellectual Archive, 2021. http://dx.doi.org/10.32370/ia_2021_03_18.

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This paper presents the findings of the pilot studies and recommendations for designing of two-hinged wooden arches. The prototype models of wooden arches with the span of 6mand the rise of 1m were designed. The models had a rectangular cross-section of 180x40mm and a T-section of 180x40mm with a plywood plate with the thickness of 6 mm and the width of 500mm. The main objective of the T-section was to ensure the stability of the arch. Each arch was composed of six segments –boards joined by clamping plates. The bowstring truss including two inclined tie bars enables carrying asymmetric loads
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Clausen, Jay, D. Moore, L. Cain, and K. Malinowski. VI preferential pathways : rule or exception. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41305.

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Trichloroethylene (TCE) releases from leaks and spills next to a large government building occurred over several decades with the most recent event occurring 20 years ago. In response to a perceived conventional vapor intrusion (VI) issue a sub-slab depressurization system (SSDS) was installed 6 years ago. The SSDS is operating within design limits and has achieved building TCE vapor concentration reductions. However, subsequent periodic TCE vapor spikes based on daily HAPSITE™ measurements indicate additional source(s). Two rounds of smoke tests conducted in 2017 and 2018 involved introductio
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