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

0

1

2

3

4

5

0 0.2 0.4 0.6 0.8

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