Connections in Precast Concrete Elements

The structural integrity of precast concrete structures depends mainly on the connections between the precast structural elements. The purpose of a connection is to transfer loads, restrain movement, and/or to provide stability to a component or an entire structure. Therefore, the design of connections is one of the most important aspects in the design of precast concrete structures. All connections should design with valid codes. Every precasters have developed connection details over the years that suit their particular production and erection preferences. It is common, that the structural engineer to show loads and connection locations and allow the successful manufacturer’s engineering department to provide the final design and details of the connections.

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Connections and Joints in Precast Concrete Structures

Slovak Journal of Civil Engineering ◽

10.2478/sjce-2020-0007 ◽

2020 ◽

Vol 28 (1) ◽

pp. 49-56

Author(s):

Ivan Holly ◽

Iyad Abrahoim

Keyword(s):

Structural Integrity ◽

Precast Concrete ◽

Concrete Structures ◽

Structural Elements ◽

Entire Structure ◽

Engineering Department ◽

Final Design ◽

Structural Engineer ◽

Internal Forces

AbstractThe structural integrity of precast concrete structures mainly depends on the connections between the precast structural elements. The purpose of a connection is to transfer loads, restrain movement, and/or to provide stability to a component or an entire structure. Therefore, the design of connections is one of the most important aspects in the design of precast concrete structures. All the connections should be designed according to the valid codes. All precasters have developed connection details over the years that suit their particular production and erection preferences. It is common that the structural engineer shows the internal forces and connection locations, and the manufacturer’s engineering department provides the final design and details of the connections. This paper describes basic types of connections and joints used in precast concrete structures

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Optimizing of system "column-cfrp lamellas" with the strengthening of civil structures

Construction and Architecture ◽

10.29039/2308-0191-2021-9-1-1-5 ◽

2021 ◽

Vol 9 (1) ◽

pp. 1-5

Author(s):

Irina Mayackaya ◽

Batyr Yazyev ◽

Anastasia Fedchenko ◽

Denis Demchenko

Keyword(s):

Reinforced Concrete ◽

Composite Materials ◽

Carbon Fiber ◽

Concrete Structures ◽

Polymeric Composite ◽

Concrete Columns ◽

Reinforced Concrete Structures ◽

Structural Elements ◽

Civil Structures ◽

Concrete Elements

Reinforced concrete elements of structures in the form of columns, beams, ceilings are widely used in the construction of buildings and structures of industrial and civil construction. In most cases, the columns serve as supports for other building elements, for example, crossbars, slabs, girders, beams. One of the cycles of the work of reinforced concrete structures is the state of their repair and reconstruction, including the stages of strengthening the elements. There is a problem of strengthening of reinforced concrete columns. The article deals with the issue of reinforcing columns and other structural elements having a cylindrical surface, with polymeric composite materials in the form of carbon fiber lamellae. The use of composite materials allows to increase the service life and strength of reinforced concrete structures used in construction.

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Fire Endurance of Concrete Elements Reinforced with GFRP Bars

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.651.181 ◽

2013 ◽

Vol 651 ◽

pp. 181-186

Author(s):

Ana Almerich-Chulia ◽

Jose Molines-Cano ◽

Pedro Martin-Concepcion ◽

Juan Rovira-Soler

Keyword(s):

Fire Resistance ◽

Structural Integrity ◽

Fire Spread ◽

Structural Elements ◽

Concrete Element ◽

Loss Of Life ◽

Fire Engineering ◽

Fire Endurance ◽

Concrete Elements ◽

Mechanics Characteristics

Fire engineering is primarily to prevent loss of life or injury during a fire. Obviously the best way to achieve this is to prevent ignition, minimizing fire spread and smoke, dying the fire before it has fully developed. When this is not possible, when the fire is fully developed, structural elements must guarantee sufficient fire resistance. If containment methods fail, structural integrity must stay for a period long enough to evacuate occupants and firemen put out it. This investigation studies the bearing capacity of GFRP reinforced concrete element, its fire resistance, variations of its mechanics characteristics and its bonding to concrete when temperature rises, together others changes that may occur in the element.

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Fatigue and fracture mechanical properties of selected concrete for subtle precast structural elements

MATEC Web of Conferences ◽

10.1051/matecconf/202031000033 ◽

2020 ◽

Vol 310 ◽

pp. 00033

Author(s):

Stanislav Seitl ◽

Petr Miarka ◽

Vlastimil Bílek

Keyword(s):

Mechanical Properties ◽

Precast Concrete ◽

Fatigue Tests ◽

Fatigue Properties ◽

Structural Elements ◽

Mechanical Fracture ◽

Fatigue And Fracture ◽

Natural Aggregates ◽

Concrete Elements ◽

Bearing Part

Precast concrete elements used as a civil structure are usually made of a cement-based matrix and natural aggregates (such as sand, gravel, crushed stone, etc.). These structures are usually exposed not only to a static load but also to a cyclic load if they load the bearing part of a bridge (traffic etc.). The knowledge of fatigue and fracture mechanical characteristics is important in designing and modelling new structures. This paper introduces and compares fracture mechanical properties obtained from static and fatigue tests for three kinds of concrete. The focus was set on the bulk density, flexural and compressive cube strength, fracture toughness and fatigue properties (S−N − Wöhler curve). All of these tests are important for a practical application in the design of precast concrete structures. The experimental results were statistically analysed and they showed that the fatigue and mechanical fracture properties improved with improved mechanical parameters of concrete.

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Experimental Investigation of the Seismic Performance of a Novel Bolt-Assembled Precast Panel Building Structure

Journal of Earthquake and Tsunami ◽

10.1142/s1793431119400086 ◽

2019 ◽

Vol 13 (03n04) ◽

pp. 1940008 ◽

Cited By ~ 1

Author(s):

W. Chen ◽

F. Xiong ◽

Y. Lu ◽

J. Chen ◽

B. Feng ◽

...

Keyword(s):

Seismic Performance ◽

Design Theory ◽

Shear Failure ◽

Structural Integrity ◽

Precast Concrete ◽

Concrete Structures ◽

Static Test ◽

Concrete Panels ◽

Successful Prediction

In this study, the authors investigated the behavior of the proposed bolt-assembled precast panel building (BPPB) system under the simulated seismic loading through a large experimental campaign. A pseudo-static test was carried out on a two-story half-scale building specimen constructed by many individual precast components which were properly joined together with bolted connections. The results show that the building specimen had the good seismic performance with high bearing capacity, comparable energy dissipation capacity and perfect structural integrity. The crack pattern and failure mode of the building specimen are different from those of traditional cast-in-situ concrete structures and equivalent cast-in-situ precast concrete structures. The final damage was concentrated in the bolted joint zones, a shear failure occurred in the edge of concrete panel near the bolt holes. It results in that the traditional design approaches of concrete shear wall cannot be applied to this new system. Therefore, the design philosophy and design formulas were proposed for the bolt-connected precast concrete panels to ensure the ductility of the panels and further improving the seismic performance of the BPPB system. The design theory of the bolt-connected precast concrete panels was validated by the successful prediction of the building specimen’s flexural capacity.

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