Double-leg reinforced concrete columns of one-storey frame buildings for seismic countries

2019 ◽  
pp. 85-94
Author(s):  
М. Аbakanov
Keyword(s):  
Reinforced Concrete ◽  
Concrete Columns ◽  
Seismic Loads ◽  
Standard Series ◽  
Variable Loading ◽  
Pilot Studies ◽  
Industrial Buildings ◽  
Frame Buildings ◽  
Reference Samples ◽  
Coefficient Of Asymmetry

characteristics, a technique of prototypes and results of pilot studies of the bearing ability and a deformationof knots of reinforced concrete double-legcolumns of one-storeyedframe industrial buildings are provided inarticle at action of low-cyclic sign-variable loadings of type of seismic. Knots were tested sign-variable cyclesquantity not less than 30, at coefficient of asymmetry of a cycle, ρs=-1. The size of loading of a cycle was accepted by equal settlement seismic. Valuesof the skilled ultimate loads experienced knots, both single unilateral, and low-cyclic sign-variable by loadings exceeded values of settlement seismic loads of 50-87%. At the sametime, decreasein the bearing ability of the knotstested by low-cyclic sign-variable loading of average and high levels in comparison with the bearing ability of the reference samples tested by single loading reached 20%.Materials with recommendationsabout tests of knots were used when developing a standard series of columns for applicationin seismic countries to 9 points

scholarly journals Using rigidity elements to strengthen one-storey buildings frames

2018 ◽  
Vol 196 ◽  
pp. 02017
Author(s):  
Oleg Veremeenko
Keyword(s):  
Reinforced Concrete ◽  
Concrete Columns ◽  
Reinforced Concrete Frame ◽  
Limit Values ◽  
Building Frame ◽  
Concrete Frame ◽  
Industrial Buildings ◽  
Calculation Results ◽  
Force Variation ◽  
Influence Degree

The study focuses on strengthening industrial buildings frames by introducing rigidity elements. Materials concentration principle in rigidity elements in the form of reinforced concrete columns is used and the influence degree on a building frame operation is estimated. This changes the performance of the overlay disk as an element that distributes horizontal forces. The paper describes basic dependencies determining the correlation between rigidity characteristics of rigidity elements and ordinary columns. They are determined by reinforced concrete frame movements when the lower section columns moments reach limit values. In resulting exposure rigidity elements accept basic horizontal efforts, and ordinary columns work as centrally compressed. Calculation results are presented as graphs of force variation depending on correlation between rigidity characteristics of rigidity elements and ordinary columns. The paper outlines that after introducing rigidity elements they act as basic distributing horizontal loads element. The overlay disk has the final load bearing capacity and regulates the limit distances between rigidity elements. The introduction of rigidity elements into the building frame should be accompanied by appropriate measures to strengthen structure foundations. The research proves that this method of one-storey industrial buildings frames reinforcement enables to use materials and technologies during reconstruction more efficiently.

Research on Calculation Method for the Reinforced Concrete Coupled Column in Certain Fuel Power Plant Main Building

2014 ◽  
Vol 711 ◽  
pp. 444-447
Author(s):  
Wei Xing Liu
Keyword(s):  
Reinforced Concrete ◽  
Power Plant ◽  
Rectangular Cross Section ◽  
Low Cost ◽  
Thermal Power ◽  
Concrete Columns ◽  
Reinforced Concrete Structure ◽  
Industrial Buildings ◽  
Superior Corrosion Resistance ◽  
Special Process

In industrial buildings, reinforced concrete structure with low cost, superior corrosion resistance, fire resistance, while reducing regular, routine maintenance workload characteristics, widely used in thermal power plant room. But when the special process requirements and other conditions that restrict the construction site need to build span, height higher open plant, if the column structure is still using the traditional rectangular cross-section in the form of, in terms of force or from the economy are inappropriate. Double limb reinforced concrete columns flat belly bar, to solve this contradiction. This article will elaborate on the design and calculation methods flat belly bar double limb column.

scholarly journals DEFECTS AND DAMAGES OF METAL CRANE BEAMS OF INDUSTRIAL BUILDINGS

2021 ◽  
Vol 9 (3) ◽  
pp. 11-15
Author(s):  
Timofey Krakhmalnyy ◽  
Sergej Evtushenko
Keyword(s):  
Control System ◽  
Life Cycle ◽  
Reinforced Concrete ◽  
Defect Formation ◽  
Concrete Columns ◽  
Industrial Building ◽  
Automated Control ◽  
Automated Control System ◽  
Industrial Buildings ◽  
Wall Panels

The article provides an analysis of typical and unique defects and damages of crane beams, which is a continuation of the series of articles by the authors about defects and damages of industrial buildings. Previously, articles on typical defects of industrial buildings have already been published: ground bases, foundations, reinforced concrete columns, metal columns, vertical connections and wall panels. Most of the defects are explained by photos. At the end of the article, an analysis of the characteristic zones of defect formation in the metal crane beams of industrial buildings is given, which allows laying the foundation for the development of an automated control system (ACS) for the life cycle of an industrial building.

scholarly journals Investigation of Deformation-Based Damage Limits of RC Columns for Different Seismic Codes

2021 ◽  
Author(s):  
Saeid Foroughi ◽  
◽  
Suleyman Bahadir Yuksel ◽  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Columns ◽  
Seismic Loads ◽  
Existing Buildings ◽  
Performance Limits ◽  
Seismic Evaluation ◽  
Rc Columns ◽  
Reinforced Concrete Columns ◽  
Seismic Codes ◽  
Parametric Studies

The seismic performance of reinforced-concrete columns is related to the expected damage limits under seismic loads and how this damage relates to safety of the structure. In order to assess the performance of reinforced-concrete columns under seismic loads, performance-based deformation and damage limits are proposed by the seismic codes. Adequacy of the deformation and damage limit levels given in the codes such as Seismic Evaluation and Retrofit of Existing Buildings Standard, ASCE/SEI-41 (2017) and Turkish Building Earthquake Code (2018) were evaluated by carrying out parametric studies for RC columns. Reinforced-concrete circular columns are designed in parametric studies to present the effects of various parameters such as concrete compressive strength, axial load levels and spiral reinforcement ratio on performance-based damage limits. Performance limits corresponding to each performance levels obtained by different seismic guidelines were compared. When the results obtained from the analyzes are examined, it has been observed that there are significantly different results in the cross-section damage limits values of ASCE/SEI-41 (2017) and TBEC (2018) regulation, which can change the performance level of the building. TBEC (2018) gives approximately 50% conservative limitations when they are compared with the ASCE/SEI-41 (2017) limitations. As a result, TBDY (2018) seems to offer safer and ductile solutions than ASCE ASCE/SEI-41 (2017).

scholarly journals DEFECTS AND DAMAGES OF REINFORCED CONCRETE COLUMNS OF INDUSTRIAL BUILDINGS

2020 ◽  
Vol 8 (2) ◽  
pp. 5-10
Author(s):  
Timofey Krakhmalnyy ◽  
Sergej Evtushenko
Keyword(s):  
Reinforced Concrete ◽  
Defect Formation ◽  
Concrete Columns ◽  
Building Structures ◽  
Reinforced Concrete Columns ◽  
Industrial Buildings

This article is a continuation of the authors ' series of articles on defects and damage to building structures of industrial buildings. This article presents typical defects and damages of precast and monolithic reinforced concrete columns of industrial buildings. The possible reasons for the formation of typical defects, the consequences of which may lead to their development, are considered, and recommendations for the elimination of identified damages are given. In conclu-sion, the article analyzes the characteristic zones of defect formation in rein-forced concrete columns of buildings in accordance with the method proposed earlier by the authors.

Design of one-storey industrial buildings from precast concrete

2019 ◽  
pp. 31-36
Keyword(s):  
Reinforced Concrete ◽  
Precast Concrete ◽  
Software Systems ◽  
Concrete Frames ◽  
Climatic Zones ◽  
Space Planning ◽  
Industrial Buildings ◽  
Frame Buildings ◽  
Equipment Type

The widespread use of one-storey frame buildings and the absence of a normative document reflecting the specifics of designing precast concrete structures of these buildings necessitated the development of provisions for the design of the frame, as well as its individual structural elements such as foundations, foundation beams, columns, roof trusses, roof beams , slabs, crane girders and external enclosing structures. These provisions are reflected in the Code of rules 355.1325800.2017 "Frame constructions, prefabricated reinforced concrete, of one-storey industrial buildings. Design rules». The Code of rules developed by the authors' team of JSC TsNIIPromzdaniy consists of 7 sections and 4 annexes. There is a classification of buildings by space-planning solutions, equipment lifting and transport equipment, type of lighting, air exchange system and the presence of heating systems. The requirements of the Code of rules apply to the design of precast reinforced concrete frames of single-storey industrial buildings of mass use for all natural and climatic zones of the Russian Federation, except for sites with seismicity of 7 or more points and zones with permafrost. The considered document is intended for designers, developers of software systems, teachers, etc.

The Retrofitting Of Reinforced Concrete Columns

2015 ◽  
Vol 21 (3) ◽  
pp. 776-781
Author(s):  
Catalin Baciu ◽  
Paricia Murzea ◽  
Vlad Cucu
Keyword(s):  
Reinforced Concrete ◽  
Optimal Solution ◽  
Concrete Columns ◽  
Social Aspects ◽  
Industrial Building ◽  
Paper Briefly ◽  
Construction Time ◽  
Total Cost ◽  
Industrial Buildings ◽  
Study Case

Abstract The retrofitting of a building requires an appreciation for the technical, economic and social aspects of the issue. Choosing the optimal solution depends on a large variety of criteria, the most important being the total cost, the construction time length (eventually with the possibility of continuous usage of the building), the ease of technologies application etc. The first part of this paper briefly presents classic and modern retrofitting technologies for industrial buildings. The second part represents a study case of a single storey industrial building retrofitting, using four different intervention options.

scholarly journals DEFECTS AND DAMAGES OF METAL COLUMNS OF INDUSTRIAL BUILDINGS

2021 ◽  
Vol 9 (2) ◽  
pp. 11-15
Author(s):  
Sergej Evtushenko ◽  
Timofey Krakhmalnyy
Keyword(s):  
Reinforced Concrete ◽  
Defect Formation ◽  
Concrete Columns ◽  
Technical Condition ◽  
Rail Transport ◽  
Automated System ◽  
Building Structures ◽  
Transport Equipment ◽  
Reinforced Concrete Columns ◽  
Industrial Buildings

This article is a continuation of the series of articles by the authors about the characteristic defects and damage to the building structures of industrial buildings. In earlier articles, there were descriptions of defects in ground foundations, damage to foundations, as well as arti-cles about damage to reinforced concrete columns and facades. The article presents a sys-tematization of defects and damage to metal columns of industrial buildings, based on the analysis of the results of the survey of many objects. The possible consequences of the de-velopment of the identified defects and damages are described. Recommendations for the assessment of the technical condition of damaged structures and recommendations for the elimination of identified defects and damage are given. The unique damages associated with the operation of lifting and transport equipment, road and rail transport are also given. The article concludes with an analysis of the characteristic zones of defect formation in the met-al columns of buildings for the created automated system for monitoring the state of indus-trial facilities.

Design of precast reinforced concrete structures of frame buildings: a new set of rules

2019 ◽  
pp. 4-9 ◽  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Building Frames ◽  
Fine Grained ◽  
Rigid Frame ◽  
Floor Slabs ◽  
Frame Buildings ◽  
Spatial System ◽  
Precast Elements

Currently, prefabricated reinforced concrete structures are widely used for the construction of buildings of various functional purposes. In this regard, has been developed SP 356.1325800.2017 "Frame Reinforced Concrete Prefabricated Structures of Multi-Storey Buildings. Design Rules", which establishes requirements for the calculation and design of precast reinforced concrete structures of frame buildings of heavy, fine-grained and lightweight structural concrete for buildings with a height of not more than 75 m. The structure of the set of rules consists of eight sections and one annex. The document reviewed covers the design of multi-story framed beam structural systems, the elements of which are connected in a spatial system with rigid (partially compliant) or hinged joints and concreting of the joints between the surfaces of the abutting precast elements. The classification of structural schemes of building frames, which according to the method of accommodation of horizontal loads are divided into bracing, rigid frame bracing and framework, is presented. The list of structural elements, such as foundations, columns, crossbars, ribbed and hollow floor slabs and coatings, stiffness elements and external enclosing structures is given; detailed instructions for their design are provided. The scope of the developed set of rules includes all natural and climatic zones of the Russian Federation, except seismic areas with 7 or more points, as well as permafrost zones.

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