Two solutions developed and implemented in NZ for seismic improvement of URM buildings

Dr. Jason Ingham The University of Auckland  

Two solutions developed and implemented in NZ for

seismic improvement of URM buildings

• Engineered Cementious Composite (ECC) applied as shotcrete

• Carbon Fibre Strips applied Near Surface Mounted

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Tens

ile st

ress

(MPa

)

Tensile strain (%)

Strengthening of URM buildings using ECC Shotcrete

Yield

Ultimate

Test program to provide design methodology

6 out-of-plane test 51 in-plane test• 25 clay brick masonry• 26 concrete masonry

Yi-Wei Lin

Implementation

Wintec F block

Victoria Park Chimney

NSM CFRP retrofitNear surface mounted (NSM) Carbon FRP (CFRP) strips

Groove preparation 15mm x 1.2mm CFRP strips Retrofitted wall

CFRP NSM

d fbp

t p

b f

Clay brick

Clay brick

Epoxy

CFRPstrip

Test results

Close up – crack pattern

PIC

Hold downsteel rods

Plaster layer

Aluminiumgrip plates

Steel angle andrubber padrestraints

Steelrestraintplate

Clamp force

NSM CFRPstrip

Steelrestraintplates

53 pull tests conducted

In-plane wall panels