The development of a long-span load-bearing reinforced-plastics roofing and walling unit

Biomimicry studies have attracted significant attention in research and practice, leading to effective engineering solutions to develop new types of structures inspired by natural systems. The objective of this study is to employ natural structures' inherent adaptivity under changing loading conditions. Three new types of compound elements are proposed that are able to improve the structure load-bearing capacity through passive inherent adaptivity. A self-centering system, inspired by the human spine, which comprises a column pre-stressed through cables, is employed as a kinematic isolator. A similar self-centering system is applied to increase the load-bearing capacity of unreinforced masonry columns. An axially loaded element, inspired by the bamboo stem, which comprises a steel core reinforced by a series of cylindrical plates that are encased in a steel tube, is employed to control the onset of instability in long-span truss structures. Application to typical frame, masonry, and truss structures is investigated through finite element analysis. Results show that the proposed compound elements are effective to increase the structure load-bearing capacity and to reduce the response under seismic excitation owning to their inherent adaptive features.

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Analysis of Ultimate Load-Bearing Capacity of Long-Span CFST Arch Bridges

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.1149 ◽

2011 ◽

Vol 90-93 ◽

pp. 1149-1156 ◽

Cited By ~ 3

Author(s):

Yang Liu ◽

Da Wang ◽

Yi Zhou Zhu

Keyword(s):

Bearing Capacity ◽

Failure Modes ◽

Ultimate Load ◽

Elastic Buckling ◽

Load Bearing Capacity ◽

Finite Element Program ◽

Load Bearing ◽

Linear Elastic ◽

Long Span ◽

Element Program

In order to study the ultimate load-bearing capacity of the long-span concrete-filled steel tubular (CFST) arch bridge with fly-bird-type, the ANSYS finite element program was used to establish its special model, and to study ultimate load-bearing capacity of this bridge with three different methods. The constitutive relation factors of concrete-filled steel tubular was taken into consideration including confining effect ultimate load coefficients, failure modes, and load-displacement curves of this bridge under different cases. The result indicate that the ultimate load-bearing capacity of the bridge can meet the requirement, all of its failure modes is out-plane, the two methods, linear elastic buckling analysis and only geometric nonlinearity analysis, will over high estimate ultimate load-bearing capacity of this bridge, and linear elastic buckling method cannot reflect real failure mode of this structure. In order to correctly estimate the ultimate load-bearing capacity of the bridge structure, the effect of geometric and material double nonlinearity couldn’t be neglected.

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Hybride Leichtbaustrukturen umformtechnisch gefügt*/Hybrid lightweight structures joined by forming – Potential and limits of hybrid load-bearing structures made of sheet metals and FRP

wt Werkstattstechnik online ◽

10.37544/1436-4980-2018-10-32 ◽

2018 ◽

Vol 108 (10) ◽

pp. 668-673

Author(s):

H. Husmann ◽

S. Köhler ◽

P. Groche

Keyword(s):

Lightweight Design ◽

Moment Of Inertia ◽

High Moment ◽

Sheet Metals ◽

Bending Tests ◽

Load Bearing ◽

Lightweight Structures ◽

Reinforced Plastics ◽

Significant Potential

Stegblechstrukturen bieten aufgrund eines hohen Flächenträgheitsmomentes ein bedeutendes Leichtbaupotenzial, welches durch die Kombination mit Faser-Kunststoff-Verbunden (FKV) sogar noch erhöht werden kann. In den vorliegenden Untersuchungen werden Potenzial und Grenzen umformtechnisch gefügter Hybridstrukturen aus Stegblechen und verstärkenden FKV-Schlaufen ermittelt. Hierzu werden Zug- und Biegeversuche herangezogen.   Due to their high moment of inertia, stringer sheet structures offer a significant potential for lightweight design, which can be further increased by combination with fibre reinforced plastics (FRP). In the present investigations, the potential and the limits of hybrid load-bearing structures made of sheet metals and FRP-straps are determined. Tensile and bending tests are used for this purpose.

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Carbon Fibre Reinforced Plastics for Load-Bearing Implants

Engineering in Medicine ◽

10.1243/emed_jour_1980_009_033_02 ◽

1980 ◽

Vol 9 (3) ◽

pp. 127-130 ◽

Cited By ~ 2

Author(s):

J S Bradley ◽

G W Hastings

Keyword(s):

Molecular Weight ◽

Carbon Fibre ◽

High Molecular Weight ◽

Load Bearing ◽

Preliminary Results ◽

Reinforced Plastics ◽

Fibre Composites ◽

Carbon Fibre Composites ◽

Ultra High Molecular Weight ◽

Carbon Fibre Reinforced Plastics

Work is currently in progress concerning two distinct groups of carbon fibre composites for orthopaedic implants. This paper will emphasize the work on carbon fibre reinforced ultra high molecular weight polyethylene for which preliminary results have been reported (Bradley and Evans, 1977). Carbon fibre reinforced epoxy will be referred to only briefly owing to publication elsewhere (Bradley et al, 1980).

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A Study on Tensile Behavior According to the Design Method for the CFRP/GFRP Grid for Reinforced Concrete

Materials ◽

10.3390/ma15010357 ◽

2022 ◽

Vol 15 (1) ◽

pp. 357

Author(s):

Jin Sung Kim ◽

Seong Jong Kim ◽

Kyoung Jae Min ◽

Jung Chul Choi ◽

Hwa Seong Eun ◽

...

Keyword(s):

Reinforced Concrete ◽

Design Method ◽

Grid Point ◽

Tensile Load ◽

Tensile Behavior ◽

Resin Infusion ◽

Element Analysis ◽

Load Bearing ◽

Reinforced Plastics ◽

Extension Fracture

In the present study, fiber-reinforced plastics (FRP) grid-reinforced concrete with very rapid hardening polymer (VRHP) mortar composites were fabricated using three types of design methods for the FRP grid (hand lay-up method, resin infusion method, and prepreg oven vacuum bagging method), along with two types of fibers (carbon fiber and glass fiber) and two types of sheets (fabric and prepreg). The FRP grid was prepared by cutting the FRP laminates into a 10 mm thick, 50 mm × 50 mm grid. The tensile behavior of the FRP grid embedded in composites was systematically analyzed in terms of the load extension, fracture mode, partial tensile strain, and load-bearing rate. The CFRP grid manufactured by the prepreg OVB method showed the best tensile behavior compared to the CFRP grid manufactured by the hand lay-up and resin infusion methods. The load-bearing of each grid point was proportional to the height from the load-bearing part when reaching the maximum tensile load. In addition, finite element analysis was conducted to compare the experimental and analysis results.

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Experimental and Statistical Analysis of Formwork Beams Reinforced with CFRP

Periodica Polytechnica Civil Engineering ◽

10.3311/ppci.13057 ◽

2019 ◽

Author(s):

Krisztián Andor ◽

András Lengyel ◽

Rudolf Polgár ◽

Tamás Fodor ◽

Zsolt Karácsonyi

Keyword(s):

Statistical Analysis ◽

Bearing Capacity ◽

Failure Modes ◽

Reference Sample ◽

Construction Materials ◽

Structural Behaviour ◽

Load Bearing Capacity ◽

Simultaneous Formation ◽

Load Bearing ◽

Reinforced Plastics

Enhancement of structural behaviour of various construction materials using fibre reinforced plastics (FRP) is an important branch of engineering research, including the increasing application for structural timber as well. This study deals with the reinforcement of standard construction formwork timber beams with carbon fibre reinforced plastics (CFRP). Beams with various amount of reinforcement were prepared using simultaneous formation of lamella and bonding. Laboratory bending tests are carried out and load-deflection data were measured to experimentally determine the change of load-bearing capacity and stiffness with respect to non-reinforced reference sample, as well as to assess the structural behaviour. Evaluation of failure modes is carried out on each specimen. A statistical analysis of the experimental results using t-test is also made. The experiments prove the enhancement of structural behaviour, especially in terms of the increased load-bearing capacity, the increased ductility in certain cases, the decrease of the scattering of results, and also in failure modes.

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Frame-type load bearing system for long-span cantilevers

The Structural Design of Tall and Special Buildings ◽

10.1002/tal.1469 ◽

2018 ◽

Vol 27 (9) ◽

pp. e1469

Author(s):

Seyed Omid Sajedi ◽

Seyed Rasoul Mirghaderi ◽

Farhad Keshavarzi

Keyword(s):

Load Bearing ◽

Long Span ◽

Bearing System

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Load-Bearing in the Ovine Medial Tibial Condyle: Effect of Meniscectomy

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0038-1633027 ◽

1993 ◽

Vol 06 (02) ◽

pp. 100-104 ◽

Cited By ~ 8

Author(s):

D. M. Pickles ◽

C. R. Bellenger

Keyword(s):

Knee Joint ◽

Contact Area ◽

Mammalian Species ◽

Total Removal ◽

Load Bearing ◽

Human Knee ◽

Biochemical Effects ◽

Pressure Sensitive ◽

Medial Meniscectomy ◽

Tibial Condyle

SummaryTotal removal of a knee joint meniscus is followed by osteoarthritis in many mammalian species. Altered load-bearing has been observed in the human knee following meniscectomy but less is known about biochemical effects of meniscectomy in other species. Using pressure sensitive paper in sheep knee (stifle) joints it was found that, for comparable loads, the load-bearing area on the medial tibial condyle was significantly reduced following medial meniscectomy. Also, for loads of between 50 N and 500 N applied to the whole joint, the slope of the regression of contact area against load was much smaller. Following medial meniscectomy, the ability to increase contact area as load increased was markedly reduced.The load bearing area on the medial tibial condyle was reduced following meniscectomy.

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