International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
RESPONSE SPECTRUM ANALYSIS OF BOTTOM RIGID BEAM STOREY AND INTERMEDIATE SOFT STOREY HAVING MOMENT TRANSFER BEAMS Sujeet Patil1, Prof. Vishwanath B Patil2 1P G Student, 2Associate Professor Dept. of civil Engineering, PDACE Kalaburagi-585102 ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - RC framed high rise building structures are
2. DESCRIPTION OF STRUCTURAL MODEL The current study has 10 different models of 21 storey having 5 bays of 11 mts in X-direction and 14 bays of 6 mts in Y-direction And a bottom storey height of 10 mts and 2.2 mts of intermediate soft storey( 11th storey) and 3.2 remaining all storeys.
designed neglecting the effect of masonary infill walls . Wheras the masonary infill walls are used for partition . The masonary infill walls are treated as non-strucutural elements . RC frame structures having open first storey is known as soft storey . The intermediate soft storey is such an element where it is left open as service soft storey without infill . Therefore the soft storey located at the lower part of high rise building experience severe seismic forces being acting on them . In satellite bus stop where bottom soft storey height is more than double height , will have more undesirable impact by the seismic forces . Meanwhile the soft storey located in the upper part of high rise building does not significantly effect the overall performance compared to the performance of the fully infill frame.
Table 1: Description of structural model DATA Zone soil strength Importance factor Response reduction factor
Key Words: Satellite bus stop, seismic analysis of building, Soft storey, moment transfer beams, shear walls.
In satellite bus stops the probability of all the undesirable effects are very severe due to the height of soft storey is double than usual, in order to avoid all undesirable effects various types of shear walls are incorporated in the project.
Š 2017, IRJET
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Impact Factor value: 5.181
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5TH Medium 1 5
Modulus of elasticity of brick masonary Youngs modulus of M25 concrete,E
25X106 KN/M2
Young’s modulus of M35 concrete,E
35X106 KN/M2
Density of brick masonary
1.INTRODUCTION The designing methodology of the structure , in India has led to the structure being more susceptible to seismic hazards . This has led to the consideration of seismic load into the design to give a safe and durable design to the building . The various lateral load resisting systems used are 1] Bare frame 2] shear wall 3] bracings. In high rise buildings the major matter of concern are the lateral loads , these lateral loads can induce vibrations , stresses and can cause seismic lateral sway of the structure. Due to increase in slenderness , the sway is also dominating, comparatively with high rise building.
VALUES
35X105kn/m2
20
GRADE OF CONCRETE For beams and slabs
M25
For columns and Shear walls
M35
LOADS Floor finish
2 kn/m2
impose loads
4 kn/m2
SLAB THICKNESS storeys 1 to 15
150 mm
storeys 16 to 21
125mm
COLUMN SIZE storeys 1 to 15
0.9X1.5 m
storeys 16 to 21
0.75X 1.5 m
BEAM SIZE Main beams (y -direction)
0.3X0.9 m
Moment transfer beams(x-direction)
0.3X0.6 m
Edge beams
0.3X0.6 m
Bottom main beams ( y-direction)
0.3X1.5 m
Thickness of masoanry wall
0.23 m
Thickness of concrete wall
0.23 m
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