This work aims to study the seismic performance with different soil condition like hard, medium and soft of multi-storied buildings having plan regularities. The buildings were analyzed by software STAAD Pro. The result obtained in term of percentage change in base shear and peak story shear.
In this attempt, following major cases will be analyzed:-
i. Modeling of structures which is 6 stories are presented. ii. A problem of multi-story structure with different soil type of condition with seismic zones III, IV, V. iii. A problem of multi-story structure is analyzed for dynamic analysis. iv. Peak Story Shear and Base Shear for different zones are determined.
4.1 Geometry
The plan of six storied building selected for study is shown in
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RESPONSE REDUCTION FACTOR RF 5
4. DAMPING DM 0.05
5. TIME PERIOD Ta 0.97
6. SOIL TYPE SS
a. HARD 1 b. MEDIUM 2
c. SOFT 3
Table 4.4: LOAD COMBIMATION
S.NO. LOAD COMBINATION
1. 1.5(DL + LL)
2. 1.2(DL + LL + EQ-X DIR.)
3. 1.2(DL + LL – EQ-X DIR.)
4. 1.2(DL + LL + EQ-Z DIR.) 5. 1.2(DL + LL – EQ-Z DIR.)
6. 1.5(DL + EQ-X DIR.)
7. 1.5(DL – EQ-X DIR.) 8. 1.5(DL + EQ-Z DIR.)
9. 1.5(DL – EQ-Z DIR.)
10. 0.9DL + 1.5EQ-X DIR.
11. 0.9DL – 1.5EQ-X DIR.
12. 0.9DL + 1.5EQ-Z DIR.
13. 0.9DL – 1.5EQ-Z DIR.
DL= Dead Load
LL= Live Load
EQ-X DIR = Earthquake load in X- Direction
EQ-Z DIR = Earthquake load in Z- Direction
2. FIGURES:
Fig 4.1: Elevation of 6 Storey Building
Fig 4.2: Plan of Structure
3. ANALYSIS
Table 4.5(A): End Shears (KN) For Basic Load Cases for Hard Soil (Zone III)
S.NO. LOAD CASE BEAM 57 BEAM 58 BEAM 59 LEFT RIGHT LEFT RIGHT LEFT RIGHT
1. DEAD LOAD 113.644 129.457 200.95 200.95 129.456 113.644
2. LIVE LOAD 27.065 29.186 28.125 28.125 29.186 27.065
3. EQ X DIR. 52.465 -52.465 45.841 -45.841 52.465 -52.465
4. EQ Z DIR. 0.88 -0.88 0.742 -0.742 0.817 -0.817
Table 4.5(B): End Shears (KN) For Basic Load Cases for Hard Soil (Zone IV)
S.NO. LOAD CASE BEAM 57 BEAM 58 BEAM 59 LEFT RIGHT LEFT RIGHT LEFT RIGHT
1. DEAD LOAD 113.644 129.457 200.95 200.95 129.456 113.644
2. LIVE LOAD 27.065 29.186 28.125 28.125 29.186 27.065
3. EQ X DIR. 78.697 -78.697 68.762 -68.762 78.697 -78.697
4. EQ Z DIR.
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