29 May 2015 - Rome
Research Meeting with
University of Brasilia–Brazil
University of Nebraska-Lincoln (Omaha Campus)
University of Rome La Sapienza
StroNGER
ϱ
1) Seismic
accelerometers placedon
the structure collect data
0 2 4 6 8 10 12 14 16
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
w-Frequency (Hz)
MagH(in/k)
4) Modal analysis and determination of the
characteristics of the structure
1/c
1/k
5) FEM
updating and
verification of
mechanical
properties
2) System
excited
3) Dynamic signal analyzer processes
data
6.
ϲ
DĞƚŚŽĚ ĂƉƉůŝĞĚ ŽŶǀĂƌŝŽƵƐ ŚŝƐƚŽƌŝĐĂů ƐƚƌƵĐƚƵƌĞƐ͗ 'ŽƚŚŝĐ
National Cathedral, U.S.
7
6
5
A4
3
2
1
Col
1
Col
4
Col
7
NC_ACol4_Heel Drop
FRF_Real Plot
0.00E+00
5.00E-07
1.00E-06
1.50E-06
2.00E-06
2.50E-06
3.00E-06
3.50E-06
4.00E-06
4.50E-06
0 5 10 15 20 25 30 35 40 45 50
Frequency (Hz)
Mag(g/N)
A1
A2
A3
A4
A5
A6
A7
Ăď sĂůŝĚĂƚŝŽŶ
• ĂƐƚŵŽƌƚĂƌ ďůŽĐŬƐ͗
Ϭ͘ϴϱ ŵ dž Ϭ͘ϯϲ ŵ dž Ϭ͘ϯϰ ŵ
Ϯϰ
Block
Block
Face
Tested
Percent
Error
Relative Amplitude
(relative to amplitude
of 3rd or 4th mode)
8.89 cm x
8.89 cm
square
void
Top
4.
6
%
5.2%
1.38
1.08
1.14
Side
5.
8
%
0.78
8.89 cm
diameter
void
Top
2.
0
%
2.2%
1.07
1.09
Side
2.
4
%
1.11
3.81 cm x
3.81 cm
square
void
Top
1.
4
%
2.3%
0.68
1.24
Side
3.
2
%
1.80
Z ^ƚƌĞŶŐƚŚĞŶŝŶŐ
• /ĚĞĂǁĂƐ ƚŽ ƐƚƌĞŶŐƚŚĞŶ ϮͲǁĂLJ ƌĞŝŶĨŽƌĐĞĚ ĐŽŶĐƌĞƚĞ ƐůĂďƐ
ƵƐŝŶŐ Z ;ƉƵďůŝƐŚĞĚΎͿ
ϱϲ
1 in- FRC SpecimenGFRP SpecimenControl Specimen
*Radik, M. and Erdogmus, E., Schafer, T. (2011). “Strengthening of Two-way reinforced concrete floor
slabs using polypropylene fiber reinforcement,” ASCE Journal of Materials in Civil Engineering,
Volume 23, Number 5, pp. 562-571, May 2011.