scholarly journals Applications, behaviour and construction of high performance steels in steel-concrete composite structures

2018 ◽  
Author(s):  
Brian Uy
Keyword(s):  
Composite Structures ◽  
High Performance ◽  
High Strength ◽  
International Standards ◽  
Design Parameters ◽  
Future Research ◽  
Building Structures ◽  
Design Procedures ◽  
Bridge Structures ◽  
Important Design

This paper addresses the applications, behaviour and construction of high performance steels in steel-concrete composite structures.   For the purposes of this paper, high performance steels will include high strength, stainless and weathering steels. Akin to many innovations in the construction industry, high performance steels have generally been adopted for the use in iconic projects well before design procedures have been developed in standards.  This paper will provide a summary of many of the applications particularly as they pertain to iconic projects in Australasia and internationally.   Recent research in these areas will also be summarised and important design parameters as they deviate from traditional mild structural steel will be highlighted.   Australasian advances in the standardisation of both bridges and buildings incorporating high performance steels will also be summarised, with particular reference to the Australasian Design Codes in Bridge Structures, ASNZS 5100 Part 6; and Building Structures ASNZS 2327 which have both been published in 2017.   The paper will conclude with suggestions for further research and will identify areas of significant gaps in Australasian and international standards which will also guide future research in this area.

scholarly journals Behavior of an Advanced Bolted Shear Connector in Prefabricated Steel-Concrete Composite Beams

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2958 ◽  
Author(s):  
Jun Chen ◽  
Wei Wang ◽  
Fa-Xing Ding ◽  
Ping Xiang ◽  
Yu-Jie Yu ◽  
...  
Keyword(s):  
Composite Structures ◽  
Concrete Slab ◽  
Concrete Strength ◽  
High Strength ◽  
Fe Model ◽  
Building Structures ◽  
Shear Connector ◽  
Test Results ◽  
Shear Connectors ◽  
Bolt Pretension

The high-strength bolt shear connector in prefabricated concrete slab has advantages in applications as it reduces time during the construction of steel-concrete composite building structures and bridges. In this research, an innovative and advanced bolt shear connector in steel-concrete composite structures is proposed. To investigate the fundamental mechanical behavior and the damage form, 22 static push-off tests were conducted with consideration of different bolt dimensions, the reserved hole constraint condition, and the dimension of slab holes. A finite element (FE) model was established and verified by using test results, and then the model was utilized to investigate the influence of concrete strength, bolt dimension, yield strength, bolt pretension, as well as length-to-diameter ratio of high strength bolts on the performances of shear connectors. On the basis of FE simulation and test results, new design formulas for the calculation of shear resistance behavior were proposed, and comparisons were made with current standards, including AISC, EN 1994-1-1, GB 50017-2017, and relevant references, to check the calculation efficiency. It is confirmed that the proposed equation is in better agreement with the experimental results.

Applications of FRP Material in Bridge Structures

2013 ◽  
Vol 798-799 ◽  
pp. 249-252 ◽  
Author(s):  
Li Jun Jia ◽  
Yang Jiang
Keyword(s):  
High Performance ◽  
Mass Density ◽  
High Strength ◽  
Small Mass ◽  
Suspension Bridges ◽  
Steel Material ◽  
Reinforced Plastic ◽  
Bridge Structures ◽  
New Type ◽  
Corrosion Of Steel

For bridge structures using the traditional steel material, some problems are hard to solve, such as corrosion of steel bar and fatigue of steel deck. And the self-weight stress of the traditional high-strength steel as the material of cable stayed and suspension bridges will limit the main span and load-carrying. As a new type of high performance structural material, fiber reinforced plastic (FRP) has many advantages, such as small mass density, high tensile strength, excellent corrosion and fatigue resistant ability. Therefor in recent years, it has attracted much attention by the construction industry. In this paper, characteristics of FRP material are introduced and then applications of FRP material in bridge structures are discussed.

scholarly journals Design and Analysis of Composite Leaf Spring

2013 ◽  
pp. 209-212
Author(s):  
Y. N. V. Santhosh Kumar ◽  
M. Vimal Teja
Keyword(s):  
Composite Materials ◽  
Automobile Industry ◽  
Composite Structures ◽  
Weight Ratio ◽  
High Strength ◽  
Design Parameters ◽  
Leaf Spring ◽  
Metallic Structures ◽  
Conventional Steel ◽  
Fiberglass Composite

In these paper, composite structures for conventional metallic structures has many advantages because of higher specific stiffness and strength of composite materials is discussed. The automobile industry has shown increased interest in the replacement of steel spring with fiberglass composite leaf spring due to high strength to weight ratio. This work deals with the replacement of conventional steel leaf spring with a Mono Composite leaf spring using E-Glass/Epoxy. The design parameters were selected and analyzed with the objective of minimizing weight of the composite leaf spring as compar

scholarly journals Sustainable Recycling of High-Strength Concrete as an Alternative to Natural Aggregates in Building Structures

2021 ◽  
Vol 13 (8) ◽  
pp. 4286
Author(s):  
Barbara Sadowska-Buraczewska ◽  
Małgorzata Grzegorczyk-Frańczak
Keyword(s):  
Bearing Capacity ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Recycled Aggregate ◽  
Building Structures ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Lower Load ◽  
Natural Aggregates

The application of recycled coarse aggregates (RCA) in high-performance concrete (HPC) was analyzed in the article. In the paper, the behavior of HPC with coarse recycled aggregate and natural coarse aggregate (NCA) was compared. Short-term experiments were conducted, including concrete deformation, deflection, load bearing capacity, and cracking of beams. The analysis involved reinforced concrete T-beams made in 100% of RCA or NCA. The studies indicated that the beams with recycled aggregate are characterized by greater deflection and 7.6% lower load bearing capacity in comparison to the beams with NCA. Substitution of coarse natural aggregate with RCA reduced the compressive and tensile strengths by 20 and 26 (%), whereas and the modulus of elasticity was decreased by 15%.

scholarly journals Deconstructable Flush End Plate Beam-to-Column Composite Joints: Component- Based Modelling

2018 ◽  
Author(s):  
Mark Andrew Bradford
Keyword(s):  
Composite Structures ◽  
Precast Concrete ◽  
Limit State ◽  
Structural Response ◽  
High Strength ◽  
Steel Beams ◽  
Composite Joints ◽  
Building Structures ◽  
Initial Stiffness ◽  
End Plate

Within a paradigm of designing building structures for their end-of-life deconstruction, thispaper addresses flush end plate beam-to-column composite joints that may be dis-assembledand reused elsewhere. The joints consist of steel beams bolted to steel columns, and these aremade composite over the joint with precast concrete slabs attached to the top flange of thesteel beams with post-tensioned high strength bolted shear connectors installed in clearanceholes. Joints of this type experience partial shear connection, and accordingly their designneeds to incorporate this effect. Experimental work reported elsewhere by the authors showsthat a structural system of this type may indeed be deconstructed, even when loaded beyondthe serviceability limit state, and that the moment-rotation response is both robust andductile. A numerical modelling using ABAQUS software is introduced in the paper, and theresults of this are used identify the parameters most influential in the structural response,and to propose equations for the initial stiffness, moment capacity and rotation capacity of ajoint. These equations are consistent with the component-based representation of theEurocode 4 and draft Australian AS2327 composite structures standard.

Innovative Design of High-Performance Multi-Loop Rope Lifting System

2018 ◽  
Author(s):  
Alvin Abraham Tanzil ◽  
Gabrielle Maassen ◽  
Justin Smoak
Keyword(s):  
Lead Time ◽  
High Performance ◽  
Planning Process ◽  
High Strength ◽  
Building Structures ◽  
Innovative Design ◽  
The Right ◽  
High Strength Fiber ◽  
Lifting System ◽  
The Ideal

In today’s world, the advent of bigger and higher building structures has pushed the limits of engineered lifts. A single heavy payload is preferable to many small loads. This practice cuts down on lead time, infrastructure and manpower to finish the job. This is where high-performance synthetic rope solutions are needed. Light weight yet high-strength fiber provides faster and safer rigging. These lifting operations require rigorous design and analysis to determine the ideal application parameters for the lift planning process... Simply, it can be a headache. Samson engineers, backed by historical big data and testing capabilities, have managed to simplify the process of finding the right sling in the most efficient way. Using proprietary technology, the time of choosing any rope size from available inventory to build that hi-capacity sling has come. The system is built to offer multiple options through its smart multi-loop sling configurator. Current capability includes building slings with rope ranging in size from 16 to 168mm, to a maximum number of 8 loops — which translates to the possibility of reaching up to 4,000mT maximum break strength on a short length of 3 meters. Smaller bend radius ratio is also possible because the system interacts with individual ropes, while working as a system. The use of a mechanical splice also allows for tighter length tolerances. Having this breakthrough at the tip of your fingers will set you apart.

scholarly journals Technical and economic efficiency of materials using 3D-printing in construction on the example of high-strength lightweight fiber-reinforced concrete

2019 ◽  
Vol 97 ◽  
pp. 02010 ◽  
Author(s):  
Aleksandr Inozemtcev ◽  
Thanh Qui Duong
Keyword(s):  
Reinforced Concrete ◽  
3D Printing ◽  
Economic Efficiency ◽  
High Performance ◽  
High Strength ◽  
Fiber Reinforced Concrete ◽  
Building Structures ◽  
Fiber Reinforced ◽  
Labor Costs ◽  
Wall Structures

The technology of 3D printing in construction causes great interest by increasing the speed and accuracy of building structures, reducing labor costs, construction waste and risks to human health. Today, the principles of 3D-printing actually are interpretations of the existing monolithic or prefabricated technology. This requires the development of high-performance materials for the extrusion of functional structures. The paper shows the example of the effectiveness application of high-strength lightweight fiber-reinforced concrete with a complex of structural and thermal insulation properties in 3D-printing technology. It has been established that the use of high-strength lightweight fiber-reinforced concrete for 3D-printing provides an increase in the useful space by 1.1...5.4 %, a reduction in the material consumption of wall structures by 6.1...19.1 % and a reduction in the number of machine hours by 29.6...37.4 %. The total technical and economic efficiency of using such a material for a standard or optimized wall section is 30.8...50.4 %.

Design of shallow rock-anchored foundations

1982 ◽  
Vol 19 (4) ◽  
pp. 463-471
Author(s):  
Nabil F. Ismael
Keyword(s):  
Transmission Lines ◽  
Design Parameters ◽  
Test Results ◽  
Design Procedures ◽  
Uplift Pressure ◽  
Rock Types ◽  
Rock Formations ◽  
Load Tests ◽  
Rock Anchors ◽  
Important Design

Full-scale uplift and lateral load tests were carried out on rock anchors and rock-anchored foundations at several sites in the Province of Ontario. Various rock types were tested, ranging from soft shale to sound limestone. The results are presented; they were analyzed and important design parameters were determined for different rock formations. Based on test results, simplified design procedures were developed for the convenience of the design engineer. Keywords: Anchors, rock, transmission lines, foundations, tests, loads, design criteria, uplift pressure.

scholarly journals Review of Experimental Studies on Application of FRP for Strengthening of Bridge Structures

2020 ◽  
Vol 2020 ◽  
pp. 1-21
Author(s):  
Wenliang Hu ◽  
Yuan Li ◽  
Haoyun Yuan
Keyword(s):  
High Performance ◽  
Experimental Studies ◽  
High Strength ◽  
Flexural Performance ◽  
Frp Composites ◽  
Bonding Performance ◽  
Current State ◽  
Reinforced Polymer ◽  
Bridge Structures ◽  
New Type

In recent years, fiber-reinforced polymer (FRP) composites have been widely used as a new type of high-performance material in concrete structures. FRP composites have the advantages of high strength, light weight, and corrosion resistance. Based on existing studies in the literature, this paper reviews the development and applications of FRP materials for the strengthening and rehabilitation of bridge structures. The types and properties of FRP composites are summarized, and the applications and development of FRP sheets, FRP bars, FRP grids, and prestressed FRP tendons for bridge structures are discussed. Different types of FRP composites result in different failure characteristics and bearing capacities. Moreover, this paper covers the FRP strengthening methods and the response properties of the flexural performance, bonding performance, and ductility. Significant conclusions regarding the strengthening/repair of bridge structures with FRP composites are presented. The review details the current state of knowledge and research on strengthening bridge structures with FRP composites and is helpful for better understanding and establishing design criteria.

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