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Abstract: Past Earthquakes are apparent that,

delicate story disappointment is heartbreaking

particularly when bhuj Earthquake occurred in

Gujarat. In urban regions stopping is

unavoidable at ground or at base level, so odds

of formation of delicate story is more; since

delicate story is a feeble story which can't

without much of a stretch exchange the seismic

powers securely to the ground as a result of

having low quality and solidness as contrast and

the above stories. A few endeavor have been

made to dispense the impact of ground delicate

story however writing is clear, in this specific

examination an endeavor is made to assess the

impact of progressive delicate story in multi

storied RC confined structure when they are

subjected to gigantic seismic powers, 3D models

have been created for various area of delicate

story in ETABS-2016 RC surrounded building is

having G+16 story in tallness. Weakling (non-

straight static) examination is an extraordinary

technique to distribute the feeble focuses in the

structure amid seismic powers. FEMA356 and

ATC40 have been utilized for non-straight pivot

properties sucker examination is a non-direct

static investigation strategy in which the

building is subjected to monotonically stacking

all through the stature, stacking is connected till

target dislodging of instrument is framed, this is

the best device in execution based plan.

Parameters, for example, Performance point,

Hinge status, target uprooting, Demand and

limit range, malleability proportion and ADRS

bends have been considered to see the

yield and extreme execution of working amid

solid shaking.

Key word: Soft storey, performance point, target

displacement, demand, capacity.

I. INTRODUCTION

The term tremor can be utilized to depict any sort of

seismic occasion which might be either common or

started by people, which creates seismic waves.

Seismic tremors are caused generally by crack of

geographical shortcomings; yet they can likewise be

activated by different occasions like volcanic action,

mine impacts, avalanches and atomic tests. An

unexpected arrival of vitality in the Earth's hull which

makes seismic waves results in what is called a

quake, which is otherwise called a tremor, a shake or

an earthquake). The perceptions from a seismometer

are utilized to gauge tremor. Quakes more prominent

than around 5 are generally investigated the size of

minute greatness. Those littler than size 5, which are

more in number, as revealed by the national

seismological observatories are for the most part

estimated on the nearby greatness scale, which is

otherwise called the Richter scale. There are

PERFORMANCE BASED DESIGN UNDER THE ACTION OF DYNAMIC LOADS

IN SOFT STOREY BUILDINGS

Abubaker Bin Abdullah Jaidi1, Mohd Hashmath2 ,Syed Farrukh Anwar3

1 Pg Student, M.tech in Structural engineering, Department of Civil Engineering, Nawab Shah Alam Khan

College of Engineering and Technology, 6-4-1, New Malakpet, Near Railway Station, Hyderabad,

Telangana 500024 2 Assistant Professor, M.tech in Structural engineering, Department of Civil Engineering, Nawab Shah

Alam Khan College of Engineering and Technology, 6-4-1, New Malakpet, Near Railway Station,

Hyderabad, Telangana 500024 3Head of the Department (PHD) , Vice Principal ,M.tech in Structural engineering, Department of Civil

Engineering, Nawab Shah Alam Khan College of Engineering and Technology, 6-4-1, New Malakpet, Near

Railway Station, Hyderabad, Telangana 500024

International Journal of Research

Volume 7, Issue XI, November/2018

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numerous structures that have essential basic

framework, which don't meet the current seismic

necessities and endure broad harm amid the quake.

The structures at Hyderabad were planned by

essential basic framework and the explanation for this

is Hyderabad lies in ZONE II of Seismic Zone Map

of 2002 i.e. as indicated by Seismic Zoning Map of

IS: 1893-2002, which says the district is minimum

likely for earth shakes.. The structures which don't

satisfy the prerequisites of seismic outline, may

endure broad harm or crumple whenever shaken by

an extreme ground movement. The seismic

assessment mirrors the seismic limit of tremor

defenceless structures for the future utilize. As per

the Seismic Zoning Map of IS: 1893-2002, India is

separated into four zones based on seismic exercises.

They are Zone II, Zone III, Zone IV and Zone V.

Rourkela lies in Zone II.

EFFECT OF SOFT STORY IN THE BUILDING

A delicate story referred to as frail story is

characterized as a story in a building that has

significantly less opposition or firmness or deficient

malleability (vitality assimilation limit) to oppose the

earth shudder initiated constructing stresses. Delicate

story structures are described by having a story which

has a considerable measure of open space.

Of a building has a story which is 70% less solid than

the floor above it, it is viewed as a delicate story

building (UBC-1997, IBC-2003 and ASCE-2002).

This delicate story makes a noteworthy feeble point

in a seismic tremor, and since delicate stories are

traditionally connected with retail spaces and parking

structures, they are regularly on the lower accounts of

a building, which implies that when they fall, they

can bring the entire working down with them,

causing genuine auxiliary harm which may render the

structure absolutely unusable. The idea of the delicate

story has been perceived long back. This idea is an

endeavour to decrease increasing speed in a working

by enabling the main story segment to yield amid a

tremor and deliver vitality dispersal activity.

Notwithstanding, over the top floats in the primary

story combined with P-Δ consequences for the

yielded sections make structures fall. delicate story

building which in this framework, Teflon sliders are

put on the highest point of the principal story fortified

cement surrounded shear dividers.

OBJECTIVE OF THE STUDY

Studying the behaviour of the structure when subjected to the Pushover Analysis by limiting the maximum displacement of the top node to the calculated target displacement.

Find the target displacement of the structure by using Idealized Force-Displacement Curve and Displacement Coefficient Method in accordance with ASCE 41-06.

Analyze the seismic performance of the existing structure with more degree of accuracy by using Non-linear Static Analysis Method.

To design the structure in the commercial software like ETABS and analysis of the structure is done.

To obtain pushover curves both in X and Y directions using FEM based analytical software ETABS 2016.

II.LITERATURE REVIEW

Anil K.Chopra, et al.,(2001)They Developed a

pushover analysis procedure based on structural

dynamic theory, which retains the conceptual

simplicity and computational attractiveness of current

procedures with invariant force distribution, but

provides superior accuracy in estimating seismic



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demands on buildings. The procedure was presented

in PEER report 2001/03. The standard response

spectrum analysis (RSA) for elastic buildings is

reformulated as a model pushover Analysis (MPA).

The peak response of the elastic structure due to its

nth vibration mode can be exactly determined by

pushover analysis of the structure subjected to lateral

forces distributed over the height of the building

according to Sn* = m ᴓn, where m is the mass matrix

and ᴓn its nth-mode, and the structure is pushed to

the roof displacement determined from the peak

deformation Dn of the nth-mode elastic SDF system

combining these peak model responses by model

combination rule leads to the MPA procedure

comparing the earthquake – induced demands for the

selected 9-story building determined by pushover

analysis using three force distributions in FEMA 273,

MPA and nonlinear RHA, demonstrates that the

MPA procedure is more accurate than all the FEMA

force distribution in estimating floor displacements

story drifts and single plastic relation.

Chatpan Chintanapakdee, et al.,(2004).He

Presented the observations on effects of vertical

irregularity on the median values of story drifts and

floor displacements when eight no. of 12-storey high

frames with strong columns and weak beams were

subjected to an ensemble of 20 ground motions. The

seismic demands for vertically regular and irregular

frames were obtained by Modal Pushover Analysis

and Nonlinear Response History Analysis and the

results are compared. The accuracy does not

deteriorate in the MPA procedure in spite of

irregularity in stiffness, strength, or stiffness and

strength provided the irregularity is in the middle or

upper story. But it is less accurate for frames with

strong, or stiff-and-strong first storey ; soft, weak or

soft-and-weak lower half; stiff, strong, or stiff-and-

strong lower half. The MPA procedure clearly

identifies the stories with large drift demands and

estimates them to a sufficient degree of accuracy,

thereby detecting critical stories in such frames. The

bias in MPA procedure for frames with a soft, weak,

or soft-and-weak first storey is about the same as for

the regular frame.

III.METHODOLOGY

Seismic Engineering is a sub discipline of the broader

category of Structural engineering. Its main

objectives therefore are-

To understand interaction of structures

with the shaky ground.

To forces the consequences of possible

earthquakes.

To design, construct and maintain

structures to perform at earthquake

exposure up to the expectations and

in compliance with building codes.

PUSHOVER ANALYSIS

Weakling investigation can be executed as power

controlled or relocation controlled. In constrain

controlled weakling strategy, full load mix is

connected as determined, i.e., drive controlled

methodology ought to be utilized when the heap is

referred to, (for example, gravity stacking). Likewise,

in drive controlled sucker system some numerical

issues that influence the exactness of results happen

since target dislodging might be related with a little

positive or even a negative horizontal firmness in

view of the advancement of instruments and P-delta

impacts.

On the off chance that the Nonlinear Static

Procedure (NSP) is chosen for seismic investigation



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of the building, a scientific model specifically joining

the nonlinear load-disfigurement attributes of

individual segments and components of the building

will be subjected to monotonically expanding

horizontal burdens speaking to inactivity powers in a

tremor until the point when an objective removal is

surpassed. The objective dislodging is expected to

speak to the greatest removal liable to be experienced

amid the plan seismic tremor. Since the scientific

model records specifically for impacts of material

inelastic reaction, the ascertained inside powers will

be sensible approximations of those normal amid the

outline seismic tremor. The connection between base

shear power and parallel uprooting of the control hub

will be set up for control hub t displacements running

somewhere in the range of zero and 150% of the

objective relocation .

So as to get execution focuses and in addition the

area of pivots in various stages, we can utilize the

weakling bend. In this bend, the range AB being the

flexible range, B to IO being the scope of moment

inhabitance, IO to LS being the scope of life

wellbeing and LS to CP being the scope of fall

anticipation. At the point when a pivot contacts point

C on its power dislodging bend then that pivot must

begin to drop stack. The way in which the heap is

discharged from a pivot that has achieved point C is

that the weakling power or the base shear is

decreased till the power in that pivot is unfaltering

with the power at point D.

As the power is discharged, the majority of the

components empty and in addition the removal is

diminished. After the yielded pivot contacts the point

D drive level, the greatness of weakling power is

again enhanced and the relocation begins to

increment once more.

On the off chance that the majority of the pivots are

inside the given CP constrain then that structure

assumed be protected. However, the pivot after IO

range may likewise be required to be retrofitted

relying upon the criticalness of structure.

The basic seismic response parameters taken into

consideration are-

(i). Stiffness

(ii). Strength

(iii). Ductility.

Now, if we consider any Reinforced Concrete frame

building, we can summarize the sources of weakness

as:

(i). Discontinuous load path/interrupted load

path/irregular load path.

(ii). Lack of deformation capability of structural

members.

(iii). Quality of workmanship and materials.

PROBLEM STATEMENT

In building plan was taken in seismic zone V for seismic analysis of the building (G+16) general building. The basic specifications of the building are:



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Beam Size 550 X 450 MM Column size 600 X 500 Bottom storey 5 mts Materials used M40 & Fe415; Depth of slab 150 mm Unit weight of concrete 25 kN/m3 Loads Live load Floor load

3 kN/m3

1.5 kN/m3 Code Books used IS1893:2002,IS875

(PART1,PART2,PART3,)IS 456:2000

IV.STRUCTURAL MODELLING

MODEL WITH OUT SHEAR WALL

MODEL WITH SHEAR WALL OPENINGS

OPENING AT BOTTOM STOREY

OPENGING IN GROUND STOREY AND

SHEAR WALL ALL AROUND

building deformed shape step 0 in view F







IV.RESULTS

PUSH OVER ANALYSIS RESULTS

STORY DRIFT IN X DIRECTION



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STORY DRIFT IN Y DIRECTION

STORY SHEAR IN X DIRECTION

STORY SHEAR IN Y DIRECTION



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STORY MOMENT IN X DIRECTION

STORY MOMENT IN Y DIRECTION



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BUILDING TORSION

EQUVALENT STATIC ANALYSIS

DRIFT IN X DIRECTION

DRIFT IN Y DIRECTION



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STOREY SHEAR FORCE IN X DIRECTION

STOREY SHEAR FORCE IN Y DIRECTION



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BENDING MOMENT IN X DIRECTION

BENDING MOMENT IN Y DIRECTION



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BUILDING TORSION

IV.CONCLUSIONS

Following ends are produced using study are: 1.Modal period is most extreme for delicate story at first floor of the thought about building 2.Column minute is most extreme for delicate story at first floor of the thought about building 3.Shear power in pillars is most extreme for delicate story at second floor of the thought about building. 4.lateral dislodging by sucker examination is done in which weakling investigation demonstrates higher qualities because of pivot arrangement component.



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5.performance point is framed in flexible zone in every single model show security against flexibility and crumple 6.Displacement bends cross target dislodging without pivot development in crumple condition indicates wellbeing against flexibility and fall 7.The outcomes acquired regarding request, limit and plastic pivots gave an understanding into the genuine conduct of structures. 8.It is fitting to give delicate story at more elevated amounts notwithstanding ground delicate story. 9.Hence the contemplated assembling doesn't require retrofitting.

REFERENCES

1.Agarwal A. (2012): Seismic Evaluation of Institute

Building, Bachelor of Technology Thesis, National

Institute of Technology Rourkela.

2. Agarwal P., Shrikhande M. (2004): Earthquake

Resistant Design of Structures, PHI Publication.

3. Bodige N., Ramancharla P. K. (2012): Pushover

Analysis of RC Bare Frame: Performance

Comparison between Ductile and Non-ductile

Detailing, Report No: IIIT/TR/2012/-1, Urban Safety

of Mega Cities in Asia (USMCA)

4. Faella C., Martinelli E., Nigro E. (2002): Steel and

concrete composite beams with flexible shear

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Structures - COMPUT STRUCT, vol. 80, no. 11, pp.

1001- 1009, 2002

5. Fardis M. N. (2009): Seismic Design, Assessment

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6. Griffith M. C., Pinto A. V. (2000):“Seismic

Retrofit of RC Buildings - A Review and Case

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and European Commission, Joint Research Centre,

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7. Goel R. K. (2008): Evaluation of Current

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Buildings, The 14th World Conference on

Earthquake Engineering October 12- 17, 2008,

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8. Kadid A., Boumrkik A. (2008): Pushover Analysis

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Seneviratna G.D.P.K. (1998): Pros and Cons of a

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