in plane shear and out of plane bending ......2009/01/09 · in plane shear and out of plane...
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Pontificia Universidad Católica del Perú
IN PLANE SHEAR AND OUT OF PLANE IN PLANE SHEAR AND OUT OF PLANE BENDING STRENGTH OF ADOBEBENDING STRENGTH OF ADOBEBENDING STRENGTH OF ADOBE BENDING STRENGTH OF ADOBE
WALLS EXTERNALLY REINFORCED WALLS EXTERNALLY REINFORCED WITH POLYPROPYLENE GRIDSWITH POLYPROPYLENE GRIDSWITH POLYPROPYLENE GRIDS.WITH POLYPROPYLENE GRIDS.
Daniel Torrealva Cecilia Cerron andDaniel Torrealva, Cecilia Cerron and Yvan Espinoza
POLYMER BIAXIAL GEOGRID
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
•POLYMER BIAXIAL GEOGRID
GEOGRID BX 1100GEOGRID BX-1100
INSTALLATION PROCEDURE
NON REINFORCED MODEL
St f SiPontificia Universidad Católica del PerúDepartamento de Ingeniería
Stefan Simon
REINFORCED MODEL
St f SiPontificia Universidad Católica del PerúDepartamento de Ingeniería
Stefan Simon
MODEL BEFORE TESTING
REINFORCED MODEL
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
North Wall - Plastered
AFTER TEST
EFFECT OF PLASTER
Non plastered side
Plastered side
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
2006 NUBIC VAULTS
REINFORCED
NON REINFORCEDREINFORCED
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
NON REINFORCED VAULT
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
REINFORCED VAULT
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
CYCLIC SHEAR TEST – PLAIN WALL
CYCLIC SHEAR TEST – PLAIN WALL
REINFORCED AND NON PLASTERED WALL
REINFORCED AND NON PLASTERED WALL
REINFORCED AND PLASTERED WALL
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
REINFORCED AND PLASTERED WALL60
REINFORCED AND PLASTERED WALL
30
40
50
10
20
Fo
rce
(kN
)
-20
-10
0
-100 -80 -60 -40 -20 0 20 40 60 80 100
Sh
ear
F
-50
-40
-30
-50
Displacement (mm)
COMPARATIVE EVOLVEMENT CURVES
Distorsión Angular vs. Esfuerzo Cortante
0.045
0.04
0.03
0.035
MP
a)
0.02
0.025
rzo
Co
rtan
te (
M
Geomalla conTarrajeo
Geomalla sinTarrajeo
0 01
0.015Esf
uer Tarrajeo
Sin Geomalla
0.005
0.01
0
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
Distorsión Angular
OUT OF PLANE BENDING TESTS
OUT OF PLANE BENDING TESTS
1ra fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
1ra fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
2da fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
2da fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
3ra fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
3ra fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
4ta fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
4ta fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
5ta fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
5ta fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
6ta fase
8
10
12
2
4
6
V(k
N)
0
2
0 10 20 30 40 50
D1 (mm)
6ta fase
8
10
12
2
4
6
V(k
N)
0
0 10 20 30 40 50
D1 (mm)
OUT OF PLANE BENDING TESTS
R i f d ith id N i f d
COMPARATIVE CURVES
Reinforced with geogrid - Non reinforced
12
6
8
10
kN
)
2
4
6
V(k
0
2
0 10 20 30 40 50
D1 (mm)D1 (mm)
BENDING TEST OF WALL WITHBENDING TEST OF WALL WITH
SAND/CEMENT MORTAR PLASTER
COMPARATIVE EVOLVEMENT CURVES
CEMENT PLASTER MUD PLASTER AND PLAIN WALLCEMENT PLASTER, MUD PLASTER AND PLAIN WALL
CONCLUSIONS
• Biaxial geogrids for its characteristics of• Biaxial geogrids, for its characteristics ofcompatibility with natural soil, high tensilet th d tiff d d bilit istrength and stiffness and durability is very
effective in drastically reducing the seismicvulnerability of earthen buildings.
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
CONCLUSIONS
•Geogrids embedded in the mud plaster of adobe•Geogrids embedded in the mud plaster of adobewalls creates a composite material, where thed b t k th i f d th idadobe takes the compression forces and the grid
the tensile forces additionally providingdisplacement capacity, therefore, it is nowpossible to develop engineering expressions top p g g pcompute shear and bending capacity of adobewalls reinforced with geogridswalls reinforced with geogrids.
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
CONCLUSIONS
• Because of its simple construction procedure• Because of its simple construction procedure,this technique can be applied on new and existingb ildi h i hi t i l t lbuildings such as in historical centers, vernacularhousing as part of landscape, and on buildingswere the plaster is not a significant characterdefining feature.g
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
CONCLUSIONS
• By providing a mean to meet current building• By providing a mean to meet current buildingcodes and life-safety standards, this technique
h l l iti i th b ildi t i lcan help legitimize earth as a building materialand allow the tradition of earthen architecture tocontinue in the future in earthquake pronecountries.
Pontificia Universidad Católica del PerúDepartamento de Ingeniería
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