Table 6 Inter-story drift values for each model by second, sixth, and fifteenth stories under the earthquakes Naghan, Tabas, and Elcentro respectively (from left to right) and also in types of flexural, x-braced and off-diagonal bracing systems.

0.35

0.32

0.38

0.17

0.16

0.21

0.23

0.26

0.28

0.37

0.29

0.56

0.28

0.21

0.24

0.11

0.09

0.12

0.21

0.18

0.25

0.17

0.12

0.21

2.95

1.68

2.93

0.62

0.6

1.4

1.08

1.67

2.63

3.28

2.96

3.95

1.05

1.98

2.85

0.7

0.83

1.71

2.76

1.24

3.12

0.94

0.91

1.08

2.48

1.85

2.33

0.8

1.15

1.93

2.05

2.93

3.34

0.85

0.63

0.79

1.49

1.08

1.45

1.45

2.41

1.68

1.46

1.25

1.68

0.72

0.85

1.13

1.2

0.9

1.21

0.72

1.52

0.79

0.77

0.72

0.9

0.43

0.52

0.54

0.8

0.58

0.86

0.51

0.89

0.46

0.68

0.55

0.88

0.08

0.29

0.42

1.49

0.47

0.98

0.95

0.6

0. 8

3.11

2.12

3.43

3.43

4.05

5.93

3.13

0.51

1.83

0.9

0.45

0.4

3.66

3.03

4.21

4.21

1.03

1.21

2.45

1.37

2.93

0.75

0.39

1

3.71

3.47

3.63

3.63

0.96

0.99

2.17

1.21

3.91

1.47

0.51

1.1

3.43

3.42

3.36

3.36

0.89

0.93

2.96

1.53

4.85

1.68

1.41

2.1

2.84

2.98

3.02

3.02

0.98

0.76

3.85

1.92

3.72

1.93

1.5

2,6

1.98

2.18

2.45

2.45

0.85

0.85

4.61

2.13

3.53

0.76

0.95

3.01

2.45

1.97

3.38

3.38

0.77

1.45

3.42

1.94

2.98

0.93

2.1

1.76

3.53

2.63

3.23

3.23

0.63

1.23

3.23

2.73

2.45

0.81

2.05

2.51

2.81

2.51

3.87

3.87

1.51

0.82

3.12

2.92

2.95

0.75

2.5

1.12

1.71

1.33

2.67

2.67

1.84

0.79

2.31

3.43

1.95

0.6

1.63

0.93

1.58

1.04

2.32

2.32

1.51

0.71

1.86

2.95

1.43

0.72

0.95

0.81

1.62

0.73

2.13

2.13

1.06

0.62

1.03

2.08

1.32

0.58

0.71

0.6

1.08

0.66

1.48

1.48

0.43

0.51

0.68

1.81

1.11

0.49

0.45

0.48

0.78

0.51

0.94

0.94

0.41

0.43

0.34

0.71

0.95

0.33

0.2

0.23

0.54

0.36

0.67

0.67

0.32

0.36