Seismic influence of homogeneous soil on rcc building. Design of seismic retrofitting of reinforced concrete. But while designing, economy of the project is also a major factor. The effect of each parameter on column depth has been compared by keeping the other two as constants. Code requirements related to design and detailing of rc frame buildings in seismic zones. In normal design practice for gravity loads, the design check for joints is not critical and hence is not usually done. Building structures generally comprise a threedimensional framework of structural elements configured to support gravity and. Seismic design of beamcolumn joints in rc moment resisting. Download basics of structural dynamics and aseismic design by. Building structures generally comprise a threedimensional framework of structural elements configured to support gravity and lateral loads. Seismic analysis of irregular lshaped rcc building ahmed vaqhar kazim prof. Retrofitting of structure there are many seismic retrofitting techniques available, depending upon the various types and conditions of structures. The bridge and structural engineer journal of ingiabse dec 2016.
The experimental study was conducted by subjecting three fullscale wide exterior beamcolumn specimens to simulated seismic loads at the nanyang technological university of singapore. A new method for the displacementbased design dbd of a variety of structures to resist the earthquake forces experienced by them is developed. An overview ofseismic performance of reinforced concrete. Experimental results indicated that fiber reinforced concrete is an appealing alternative to conventional confining reinforcement. The second specimen was also made of normal concrete and incorporated full seismic details. Generally being a structural engineer we should concentrate towards the structural as well as functional design of the structure. Joints in concrete construction types and location of. So, the design of irregular buildings needs special care and enhancement of member sizes at regions of irregularity. For the same lithology, joints are more closely spaced in thinner beds. Seismic behaviour and design of reinforced concrete. Behaviour of multistorey rcc structure with different type of. The third and fourth specimens were similar to the first one but used steel fiber reinforced concrete in the joint region. But, the failure of reinforced concrete frames during many earthquakes.
Seismic design of castinplace concrete diaphragms, chords, and collectors. Seismic behavior of beam column joints in reinforced. On the other hand, in order to carryout performance based design of structures, it is essential to quantify performance measures such as prevention of collapse fema356, 2000 which are represented by horizontal drift under seismic excitations. Pdf seismic design of building structures mansour al. Studiohuerta creates antiseismic structure at mexicos. Seismic behavior of nonseismically detailed interior beam. For this purpose the nonlinear timehistory analysis is performed on. Comparative studies in analysis and design of rcc structures with and without infill wall under seismic effect bhnaupratap r mehadia dr. Instead of adopting empirical analysis such as in aci 318m08 building code, the proposed approach is based on rational analysis of the stressstrain state of the joint. In consideration of the shortcomings of the currently used force transfer model for bridge joints, an improved design model, referred to hereafter as the modified external strut force transfer model, is introduced in this paper.
The research paper published by ijser journal is about seismic evaluation of existing reinforced concrete building 6. Retrofitting of rcc beams using steel plates kushlendra lal kharwar department of civil engineering madan mohan malaviya university of technology, gorakhpur, india abstract many of the building structure or any reinforcement concrete structure super structure damaged due to the extra load or frequent earthquakes. Among others, relocation of plastic hinges away from beamcolumn joints has been proved to be effective. For seismic design of reinforced concrete structure which. Design of seismic retrofitting of reinforced concrete structures. Design of seismic retrofitting of reinforced concrete structures s. Design of joints in rc structures with particular reference to seismic conditions the failure of reinforced concrete structures in recent earthquakes in several countries has caused concern about the performance of beamcolumn joints. Specific rules for design and detailing of concrete. Since joints end at layer boundaries, which are rock discontinuities, the longer joints in thicker layers need to be spaced less frequently. Pdf the dynamic action of earthquake excitation introduce high shear and bond stress conditions in. Chapter 3 summarizes the current empirical base for design of underground structures in rock, and chapter 4 briefly 11. To obtain an efficient building, a structure must also be ductile. Review article comparative study of seismic performance of.
The special requirements relate to inspection, materials, framing members beams, columns, and beamcolumn joints, and to construction procedures. Beam column joints in a reinforced concrete moment resisting frame are crucial zones for transfer of loads effectively between the connecting elements i. Seismic design ofbuilding structures aprofessionals introduction to earthquake forces and design details ninth edition michael r. Seismic evaluation of existing reinforced concrete building. Application of these, results in improving structural performances such as stiffness, load carrying capacity and ductility.
In this paper, analysis of seismic shear design of dch walls in accordance with en 19981 is performed in the example of twentystory rc building with ductile wall system. Three types of irregularities namely mass irregularity. Beamcolumn joints are critical members in a momentresisting structure to maintain the stability of the whole structure. Seismic analysis of reinforced concrete structures using.
The bars could then slip through the columns, greatly reducing the stiffness in the beamcolumn assemblies. S i l i c o n i n s t i t u t e o f t e c h n o l o g y sambalpur, odisha 2. Overview of eurocode 8 seismic design of rc buildings. Therefore, an expansion joint is effective for both shrinkage and temperature variations. Design of steeltoconcrete joints, design manual i although all care has been taken to ensure the integrity and quality of this publication and the information herein, no liability is assumed by the project partners and the publisher for any damage to property or persons as a result of the use of this publication. Seismic design is based on inherent ductile response, which is manifested by capacity design principles in reinforced concrete buildings. Thus the physical property of the foundation medium is an important factor in the earthquake response of structures supported on it. Failure of beamcolumn joints is likely to cause the collapse of the structure. The plan configurations of structure have significant impact on the seismic response of structure in terms of displacement, story drift, and story shear demands. Comparison of the results of analysis and design of irregular structures with regular structure was done. I need to say to design rc frame structure for seismic region instead of designing and analysis of all body of. Despite these findings, this design method is widely endorsed for use in seismic design practice in the united states. Seismic design of reinforced concrete structures topic 11 is the seismic design of reinforced concrete structures, primarily buildings. Comparative studies in analysis and design of rcc structures.
Pdf design and construction aspects of seismic rc beam. Seismic rehabilitation of strengthened reinforced concrete interior beamcolumn joints using frp composites. May 10, 2014 seismic design is based on inherent ductile response, which is manifested by capacity design principles in reinforced concrete buildings. During this lesson you will learn the basics of seismic design of reinforced concrete buildings.
Cost, function, aesthetic, and seismic zone considerations that also influence the selection of a strengthening technique are. Seismic rehabilitation of strengthened reinforced concrete interior beamcolumn joints using frp. It is important to ensure early in the design phase that the. For seismic design of reinforced concrete structure which area we have to take care.
Behavior of rcc building with shear wall with different characteristic at seismic zones ii and v g s s ram tej 1, dr. Joints also termed extensional fractures are planes of separation on which no or undetectable shear displacement has taken place. Assessing the seismic collapse risk of reinforced concrete frame structures, including the effects of modeling uncertainties abbie liel. In normal design practice for gravity loads, the design check for joints is not critical and hence not warranted. The building longer than 45m are generally provided with one or more expansion joint. Keeping economy and safety of the structure in mind, we came with the concept of partial beam. Performance based seismic design is an iterative process, begins with choice of. Syed farrukh anwar student head of department department of civil engineering department of nawab shah alam khan college of engineering and technology nawab shah alam khan college of engineering and technology mohd hashmath assistant professor. Behaviour of multistorey rcc structure with different type. The design of reinforced concrete rc structures to seismic action should provide sufficient information about the energy dissipation capacity of the structure without reducing substantially the strength in favour of horizontal. Ductility in reinforced concrete materials and members are discussed in this chapter.
The structure should possess main attributes to perform well in earthquake, such as simple and regular configuration, adequate lateral strength, stiffness and ductility 1. In general, water retaining structure distress has been observed very early even in 9 to 10 years of service life due to some problems related to structural aspects and over emphasis of seismic analysis in earthquake prone zones. The concrete is subjected to volume change due to many reasons. Buildings designed using these principles will fare better in a seismic event than the building shown in this slide.
Is codes do not include recommendations on beamcolumn joints explicitly. Dritsos department of civil engineering, university of patras, patras, greece abstract as knowledge increases and buildings in seismic regions are designed with higher degrees of safety, it becomes clear that older structures may require upgrading. Improved seismic design procedure for concrete bridge joints. For this purpose the nonlinear timehistory analysis is performed on the spatial model where the structure is exposed to. The objective of the project is to carry out response spectrum analysis rsa of vertically irregular rc building. The impact on the design of healthcare facilities by angeline stimpson.
Nonseismic design of beamcolumn joints request pdf. The effect of confinement for increasing compressive strain capacity of concrete is explained. Download basics of structural dynamics and aseismic design. Experimental tests rc frames have shown that the excessive damage or failure of beamcolumn joints, in particular exterior or corner joints which can lead to the global collapse of a building. Objectives to study the seismic behavior of rcc and composite building with buckling restrained braces. The calculated results indicated that global behavior of the joints can be simulated to correlate well with the experimental observations. The structural design of foundations, by itself, represents the union and the frontier.
So we have to cater for this by way of joint to relieve the stress. Comparative study of a rcc structure for the elimination of. Seismic behavior of reinforced concrete exterior wide beam. Studies on behaviour of rcc beamcolumn joint retrofitted. Seismic behavior of beam column joints in reinforced concrete. Seismic design of multistoried rcc buildings structural. Seismic design of buildings worked examples eurocodes europa.
Behaviour of multistorey rcc structure with different type of bracing system a software approach nauman mohammed 1, islam nazrul 2 structure engineer, dep artment of civil engineering, faculty of engineering and technology, jamia millia islamia, new delhi, india 1. I need to say to design rc frame structure for seismic region. For assessment of an individual building design, there is significant. Arch 595 independent study professor marci uihlein university of. Buy basics of structural dynamics and aseismic design by damodarasamy, s. Columns were designed for axial loads along with uniaxial. Chengming lin supervised by ji restrepo and r park university of canterbury eqc funded project 97294 technical abstract. Performancebased seismic design of reinforced concrete. Bending moments, shear forces, storey shears, story drifts and axial f orces is compared for all type of structural systems i. Some methods are additions of rc structural walls, use of steel bracings, seismic isolation, use of frp and supplemental energy dissipation devices dampers. Many methods have been proposed to strengthen reinforced concrete beamcolumn joints. Earthquake analysis of rcc buildings on hilly shaik imran1, p. Present study based on performance based seismic design and nonlinear analysis of multistorey rcc building.
Seismic analysis and earthquake characteristics of rcc. This is because the formation of joints relieves tensile stress in the layer over a lateral distance proportional to the joint length. Assessing the seismic collapse risk of reinforced concrete. Rajesh2 1, 2 department of civil engineering 1, 2 st. Types of construction joints in concrete structures. The estimation of earthquake motions at the site of structure is most important phase of design of the structure.
Pancholi3 1 associate professor, applied mechanics, ldce, gujarat, india 2 p. For preliminary design these parameters are determined from approximate empirical relationships. Energy formulation for seismic collapse assessment of rcc. Construction joints except for very small structures, it is impractical to place concrete. The physical model of shear transfer mechanism in reinforced concrete beamcolumn joints in which the new zealand concrete structures standard nzs 3101.
The proposed method requires the determination of yield and ultimate displacements of the structure. Download free sample and get upto 48% off on mrprental. Seismic design of reinforced concrete special moment frames. For the analysis and design purpose four model has been considered namely as 1. The paper proposes a method for the seismic design of external beamcolumn joints by considering that the load transferred from the linear elements to the joint is. A performancebased seismic design approach for reinforced concrete beamcolumn joints has been proposed in this paper. The paper proposes a method for the seismic design of external beamcolumn joints by considering that the load transferred from the linear elements to the joint is predominantly resisted by a. Hayes is the director of nehrp, within nists building and fire research. It is assumed that the motion in foundation level of equal structure is to ground. The two walls of the resulting tiny opening typically remain in tight matching contact. In addition, the effects of several critical design parameters on the joints behavior are. Rcc interior beam column joints under reversed cyclic.
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