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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