scholarly journals Demountable Column - Girder Joint

2021 ◽  
Vol 30 (4) ◽  
Author(s):  
Aleš Polák
Keyword(s):  
Life Cycle ◽  
Reinforced Concrete ◽  
Experimental Research ◽  
Static Load ◽  
Reinforced Concrete Structures ◽  
Column Joint ◽  
Load Tests ◽  
Long Life ◽  
Precast Structures ◽  
Basic Input

Traditional precast reinforced concrete structures are characterised by joints of individual components executed with the use of cement grouts or mortars, or by welding reinforcement. The joints produced in this way cannot be demounted in the case of need without damaging the precast components. Demountable precast structures with a long life cycle enable repeated assembly and demounting thus contributing to the saving of the basic input resources and the environment. The main feature of demountable precast structures are patent-protected joints which allow the assembly of the precast components without the necessity of using “wet” processes. The article addresses the characteristics of a demountable girder - column joint. It presents the results of static load tests carried out within extensive experimental research. To conclude, the article specifies the benefits and the applications of demountable structures.

Reducing The Life Cycle Cost of Reinforced Concrete Structures by using Fiber in Concrete

2014 ◽  
Vol 4 (3) ◽  
pp. 1-9
Author(s):  
Badrinarayan Rath ◽  
◽  
Shirish Deo ◽  
Gangadhar Ramtekkar ◽  
◽  
...  
Keyword(s):  
Life Cycle ◽  
Reinforced Concrete ◽  
Life Cycle Cost ◽  
Concrete Structures ◽  
Reinforced Concrete Structures

scholarly journals Deformability of Short Steel Reinforced Concrete Structures on Light Concrete

2018 ◽  
Vol 7 (3.2) ◽  
pp. 370 ◽  
Author(s):  
Oleksandr Semko ◽  
Viktor Dariienko ◽  
Vitaliy Sirobaba
Keyword(s):  
Reinforced Concrete ◽  
Sheet Metal ◽  
Experimental Research ◽  
Lightweight Concrete ◽  
Structural Parameters ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Steel Reinforced Concrete ◽  
Thin Walled

The calculation, modeling and experimental research of steel-concrete tubular elements made of thin-walled galvanized sheet metal and lightweight concrete have been carried out. The proposed type of structures can be used as a separate structure in the form of a column or a pillar, and one of the types of the reinforcement of a certain light structure. The basic technological and constructive requirements for manufacturing and further exploitation of structures are given. For determination of actual work’s indexes of constructions experimental research of standards are undertaken, and recommendations on adjustment of well-known calculation formulas of close constructions as for structural parameters are given. The design (modeling) was performed in MSC / Nastran software. An analysis of the proposed structures use is carried out with the corresponding conclusions. 

Seismic Rehabilitation of Beam-Column Joints Using FRP Sheets and Buckling Restrained Braces

2013 ◽  
Vol 479-480 ◽  
pp. 1170-1174
Author(s):  
Hee Cheul Kim ◽  
Dae Jin Kim ◽  
Min Sook Kim ◽  
Young Hak Lee
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Seismic Performance ◽  
Reinforced Concrete Structures ◽  
Test Results ◽  
Seismic Rehabilitation ◽  
Buckling Restrained Braces ◽  
Column Joint ◽  
Energy Dissipation Capacity

The purpose of this study was to evaluate seismic performance of rehabilitated beam-column joint using FRP sheets and Buckling Restrained Braces (BRBs) and provide test data related to rehabilitated beam-column joints in reinforced concrete structures. The seismic performance of total six beam-column specimens is evaluated under cyclic loadings in terms of shear strength, effective stiffness, energy dissipation and ductility. The test results showed wrapping FRP sheets can contribute to increase the effect of confinement and the crack delay. Also retrofitting buckling restrained braces (BRBs) can improve the stiffness and energy dissipation capacity. Both FRP sheets and BRBs can effectively improve the strength, stiffness and ductility of seismically deficient beam-column joints.

scholarly journals Cracking and strength of reinforced concrete structures in flexure strengthened with carbon fibre laminates

2007 ◽  
Vol 13 (4) ◽  
pp. 317-323
Author(s):  
Juozas Valivonis ◽  
Tomas Skuturna
Keyword(s):  
Reinforced Concrete ◽  
Comparative Analysis ◽  
Carbon Fibre ◽  
Experimental Research ◽  
Design Procedure ◽  
Design Methods ◽  
Reinforced Concrete Structures ◽  
External Reinforcement ◽  
Tension And Compression ◽  
Theoretical Results

The article presents the analysis of the cracking moment and the strength of beams reinforced with external carbon fibre. Experimental research of beams strengthened in this way has been carried out. Three different methods of anchoring external reinforcement were applied to strengthen the beams. The influence of anchorage on the cracking moment and the strength of the beams has been defined. Design methods for defining the cracking moment and the strength have been presented. The design procedure for defining the cracking moment evaluates the curvilinear stress diagrams of concrete under tension and compression. The design procedure for defining the strength of the structures evaluates the stiffness of the contact between the carbon fibre and the concrete. The design results are provided. Comparative analysis of the experimental and the theoretical results has been performed.

scholarly journals CRACKING AND STRENGTH OF REINFORCED CONCRETE STRUCTURES IN FLEXURE STRENGTHENED WITH CARBON FIBRE LAMINATES

2007 ◽  
Vol 13 (4) ◽  
pp. 317-323 ◽  
Author(s):  
Juozas Valivonis ◽  
Tomas Skuturna
Keyword(s):  
Reinforced Concrete ◽  
Comparative Analysis ◽  
Carbon Fibre ◽  
Experimental Research ◽  
Design Procedure ◽  
Design Methods ◽  
Reinforced Concrete Structures ◽  
External Reinforcement ◽  
Tension And Compression ◽  
Theoretical Results

The article presents the analysis of the cracking moment and the strength of beams reinforced with external carbon fibre. Experimental research of beams strengthened in this way has been carried out. Three different methods of anchoring external reinforcement were applied to strengthen the beams. The influence of anchorage on the cracking moment and the strength of the beams has been defined. Design methods for defining the cracking moment and the strength have been presented. The design procedure for defining the cracking moment evaluates the curvilinear stress diagrams of concrete under tension and compression. The design procedure for defining the strength of the structures evaluates the stiffness of the contact between the carbon fibre and the concrete. The design results are provided. Comparative analysis of the experimental and the theoretical results has been performed.

Normative Service Life Of Concrete And Reinforced Concrete Structures And Principles Of Their Design Based On Durability Parameters

2019 ◽  
pp. 13-22
Keyword(s):  
Life Cycle ◽  
Reinforced Concrete ◽  
Service Life ◽  
Bearing Capacity ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Life Cycle Design ◽  
Determining Factors ◽  
Corrosion State ◽  
Standard Service

The paper systematizes the main criteria necessary to determine the standard service life of concrete and reinforced concrete structures; the state of domestic and foreign regulatory framework is analyzed in terms of requirements for the service life of reinforced concrete structures; the main normative and technical documents are considered in the field of life cycle design of reinforced concrete structures of buildings and constructions. The types of corrosion damages of reinforced concrete structures and their determining factors are described; the internationally agreed models of durability for some degradation processes are given. On the basis of the work carried out, proposals were prepared to assess the corrosion state of the exploited reinforced concrete structures, their residual bearing capacity, operational serviceability, expected service life under specified aggressive actions, and methods for determining the standard service life of reinforced concrete structures. Proposals for the development and updating of a number of relevant regulatory, technical, organizational and methodological documents are given.

A DEMOUNTABLE PRECAST REINFORCED CONCRETE BUILDING SYSTEM OF MULTI-STORY BUILDINGS

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Jiri Witzany ◽  
Radek Zigler ◽  
Tomas Cejka ◽  
Ales Polak
Keyword(s):  
Reinforced Concrete ◽  
Characteristic Property ◽  
Static Load ◽  
Hollow Core ◽  
Load Bearing ◽  
Reinforced Concrete Building ◽  
Concrete Building ◽  
Load Tests ◽  
Building System ◽  
Bearing Structure

The demountable precast reinforced concrete building system consists of bar and thin-walled units allowing designing hybrid integrated systems of multi-storey buildings. The system’s characteristic property are demountable, self-rectifiable and dry joints enabling assembly without wet processes and, in case of need, the disassembly and relocation of the structure. The system applies special mounting, the joint of prestressed hollow core floor units and the load-bearing structure by steel pins additionally embedded in the hollow cores. The article presents the results of experimental research into the major parts and joints of the load-bearing system and the verification of the load-bearing system’s prototype exposed to static load tests with an example of the load-bearing system’s assembly and disassembly.

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