Relationship between Temperature and Earth Pressure for RFERS - Rigidly Framed Earth Retaining Structures - page 99

0 , n

δ

0 ,

δ

δ

0 , n

s

s

s

i=0

z

i=1

w(z)

i=2

A o

i=n

(b) (c)

I

b

l

n


=

H = l

ci

i 1

l 2

I

l

cn

cn

() w z

l l

l

2 bm

m


=

L = l

bj

j 1

(a)

Fig. 5.11 (a) Legend for Stories, Bays, and Beam and Column Attributes of RFERS,
(b) Deflected Frame, and (c) Equivalent Cantilever Beam for Frame Analysis

The calibration factors shown in Fig 3.5 were obtained from FEM analysis of
42,000 different RFERS configurations, using multivariate non-linear regression
between the derived expressions and FEM (Iskander et al 2011b, c). The calibrat-
ed expression for earth pressure (hydrostatic) loading is:



3



W ⋅ sl i

 

i
s

c

δ = α ⋅ 



1 + 



β 






(5.6)

3 GA s

 

o

where, W is the total force acting on the RFERS, i is the story where the lateral
drift is computed, s is the number of stories, lc is the length of the column, G is the