Truss model of origami inspired folded structures

2016 ◽  
pp. 201-205
Author(s):  
W Gilewski ◽  
J Pełczyński
Keyword(s):  
Truss Model ◽  
Folded Structures

scholarly journals A Monotonic Smeared Truss Model to Predict the Envelope Shear Stress—Shear Strain Curve for Reinforced Concrete Panel Elements under Cyclic Shear

2021 ◽  
Vol 2 (1) ◽  
pp. 174-194
Author(s):  
Luís Bernardo ◽  
Saffana Sadieh
Keyword(s):  
Shear Stress ◽  
Reinforced Concrete ◽  
Shear Strain ◽  
Peak Load ◽  
Strain Curve ◽  
Fiber Reinforced Polymers ◽  
Shear Stresses ◽  
Cyclic Shear ◽  
Concrete Panels ◽  
Truss Model

In previous studies, a smeared truss model based on a refinement of the rotating-angle softened truss model (RA-STM) was proposed to predict the full response of structural concrete panel elements under in-plane monotonic loading. This model, called the “efficient RA-STM procedure”, was validated against the experimental results of reinforced and prestressed concrete panels, steel fiber concrete panels, and reinforced concrete panels externally strengthened with fiber-reinforced polymers. The model incorporates equilibrium and compatibility equations, as well as appropriate smeared constitutive laws of the materials. Besides, it incorporates an efficient algorithm for the calculation procedure to compute the solution points without using the classical trial-and-error technique, providing high numerical efficiency and stability. In this study, the efficient RA-STM procedure is adapted and checked against some experimental data related to reinforced concrete (RC) panels tested under in-plane cyclic shear until failure and found in the literature. Being a monotonic model, the predictions from the model are compared with the experimental envelopes of the hysteretic shear stress–shear strain loops. It is shown that the predictions for the shape (at least until the peak load is reached) and for key shear stresses (namely, cracking, yielding, and maximum shear stresses) of the envelope shear stress–shear strain curves are in reasonably good agreement with the experimental ones. From the obtained results, the efficient RA-STM procedure can be considered as a reliable model to predict some important features of the response of RC panels under cyclic shear, at least for a precheck analysis or predesign.

scholarly journals Metamorphic Protein Folding Encodes Multiple Anti-Candida Mechanisms in XCL1

Pathogens ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 762
Author(s):  
Acacia F. Dishman ◽  
Jie He ◽  
Brian F. Volkman ◽  
Anna R. Huppler
Keyword(s):  
Antifungal Drugs ◽  
Surrounding Tissue ◽  
Membrane Disruption ◽  
Antimicrobial Proteins ◽  
Iodide Uptake ◽  
Future Design ◽  
Serious Infections ◽  
Metamorphic Protein ◽  
Folded Structures ◽  
Adenylate Kinase Release

Candida species cause serious infections requiring prolonged and sometimes toxic therapy. Antimicrobial proteins, such as chemokines, hold great interest as potential additions to the small number of available antifungal drugs. Metamorphic proteins reversibly switch between multiple different folded structures. XCL1 is a metamorphic, antimicrobial chemokine that interconverts between the conserved chemokine fold (an α–β monomer) and an alternate fold (an all-β dimer). Previous work has shown that human XCL1 kills C. albicans but has not assessed whether one or both XCL1 folds perform this activity. Here, we use structurally locked engineered XCL1 variants and Candida killing assays, adenylate kinase release assays, and propidium iodide uptake assays to demonstrate that both XCL1 folds kill Candida, but they do so via different mechanisms. Our results suggest that the alternate fold kills via membrane disruption, consistent with previous work, and the chemokine fold does not. XCL1 fold-switching thus provides a mechanism to regulate the XCL1 mode of antifungal killing, which could protect surrounding tissue from damage associated with fungal membrane disruption and could allow XCL1 to overcome candidal resistance by switching folds. This work provides inspiration for the future design of switchable, multifunctional antifungal therapeutics.

FORMATION OF FAULTS ORIENTED ACROSS THE STRIKE OF FOLDED STRUCTURES

1964 ◽  
Vol 6 (7) ◽  
pp. 1143-1153
Author(s):  
Ye.M. Nekrasov
Keyword(s):  
Folded Structures

scholarly journals Geodynamics and Oil and Gas Potential of the Yenisei-Khatanga Basin (Polar Siberia)

Minerals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 510 ◽  
Author(s):  
Valery Vernikovsky ◽  
Georgy Shemin ◽  
Evgeny Deev ◽  
Dmitry Metelkin ◽  
Nikolay Matushkin ◽  
...  
Keyword(s):  
Lower Cretaceous ◽  
Oil And Gas ◽  
Foreland Basin ◽  
Gas Reservoirs ◽  
The North ◽  
Western Arctic ◽  
Folded Structures ◽  
Gas Potential ◽  
First Time ◽  
North Western

The geodynamic development of the north–western (Arctic) margin of the Siberian craton is comprehensively analyzed for the first time based on our database as well as on the analysis of published material, from Precambrian-Paleozoic and Mesozoic folded structures to the formation of the Mesozoic-Cenozoic Yenisei-Khatanga sedimentary basin. We identify the main stages of the region’s tectonic evolution related to collision and accretion processes, mainly subduction and rifting. It is demonstrated that the prototype of the Yenisei-Khatanga basin was a wide late Paleozoic foreland basin that extended from Southern Taimyr to the Tunguska syneclise and deepened towards Taimyr. The formation of the Yenisei-Khatanga basin, as well as of the West-Siberian basin, was due to continental rifting in the Permian-Triassic. The study describes the main oil and gas generating deposits of the basin, which are mainly Jurassic and Lower Cretaceous mudstones. It is shown that the Lower Cretaceous deposits contain 90% of known hydrocarbon reserves. These are mostly stacked reservoirs with gas, gas condensate and condensate with rims. The study also presents data on oil and gas reservoirs, plays and seals in the Triassic, Jurassic and Cretaceous complexes.

scholarly journals STRUCTURAL BEHAVIOR OF PILE CAP 3 PILE WITH EKSENTRIC LOAD DESIGNED USING STRUT AND TIE MODEL WITH NUMERICAL METHOD

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Panji Ginaya Taufik
Keyword(s):  
Conventional Method ◽  
Vertical Load ◽  
Eccentric Load ◽  
Strut And Tie ◽  
Model Method ◽  
Truss Model ◽  
Stress Trajectory ◽  
Pile Cap ◽  
The Difference ◽  
Strut And Tie Model

Pile cap is a structure to distribute load from the upper structure to the sub structure. Often the planning of the pile cap is approached as a two way slab or beam with pile as restrain, by consider the bending and shear separately. As is the case with conventional methods that consider 1-way shear, 2-way shear, and bending separately. The strut and tie model can be used as an alternative method in designing a pile cap, by approaching the stress trajectory with the truss model. In this study, a pile cap will be designed using the conventional method and the strut and tie model, the pile cap with 3 pile cap and an eccentric load. Then the results are tested numerically using Abaqus to determine the difference in behavior. The main reinforcement results from the strut and tie model method are more evenly stressed than the conventional method, also the vertical load needed to achieve the main reinforcement yield stress strut and tie model (1100 kN) is greater than the conventional method (900 kN).

Relations Stratigraphiques entre le Groupe de Pontiac et le Sillon Métavolcanique de Baby au Témiscamingue, Québec

1973 ◽  
Vol 10 (8) ◽  
pp. 1350-1353 ◽  
Author(s):  
L. Imreh
Keyword(s):  
Geological Mapping ◽  
Superior Province ◽  
Satisfactory Solution ◽  
Northern Flank ◽  
Actual Contact ◽  
Age Relation ◽  
Folded Structures

The pre-Kenoran Archean stratigraphy has always been of prime interest to geologists working in the Superior Province. However, one must realize that the problems raised have remained, for the most part, without satisfactory solution. Thus, the respective age relation of the thick lithostratigraphic metavolcanic and metasedimentary units (Pontiac), forming respectively the Baby Rift and its northern flank to the northeast of Ville-Marie in Temiscaming, has not been defined with certainty to date.During a geological mapping project on a scale of 1:12 000, covering the township of Baby and adjacent parts of the townships of Guérin and Guigues, it has become possible for us to remove the uncertainty and to define the age relation of the two units mentioned. We can now state that the metasedimentary unit (Pontiac) forms the stratigraphic base of the metavolcanic unit.To arrive at this conclusion it was first necessary to determine the size of the main folded structures in the region of Rapide des Quinze, then to uncover and let weather the outcrops over several kilometers, in order to define the actual contact of the two units. [Translated by the Journal]

Refined Softened Truss Model with Efficient Solution Procedure for Prestressed Concrete Membranes

2018 ◽  
Vol 144 (6) ◽  
pp. 04018045 ◽  
Author(s):  
L. F. A. Bernardo ◽  
A. R. B. Lyrio ◽  
J. R. B. Silva ◽  
B. Horowitz
Keyword(s):  
Prestressed Concrete ◽  
Efficient Solution ◽  
Solution Procedure ◽  
Truss Model
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