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SUMMARY:Seismic risk assessment for architectural heritages in historic ar
 eas using field and centrifuge tests - Dr Heon-Joon Park
DTSTART:20131114T160000Z
DTEND:20131114T170000Z
UID:TALK47434@talks.cam.ac.uk
CONTACT:Anama Lowday
DESCRIPTION:For the seismic risk assessment of architectural heritages in 
 historic areas\, this study organises the field site characterisation\, si
 te-specific ground response analysis and GIS based microzonation for Korea
 n historic areas. And this study proposes dynamic centrifuge modelling tes
 t for stone masonry structures and shows that the seismic risk of actual a
 rchitectural heritages can be assessed through this test.\n\nA seismic ris
 k assessment is conducted for cultural heritage sites in Gyeongju and Buye
 o\, the capitals of Korea’s ancient kingdoms. An extensive geotechnical 
 survey including a series of in situ tests is presented\, providing pertin
 ent soil profiles for site response analyses on cultural heritage sites. A
 fter the shear wave velocity profiles and dynamic material properties were
  obtained\, site response analyses were carried out at each historical sit
 e and the amplification characteristics\, site period\, and response spect
 rum of the site were determined for the earthquake levels of 2400 and 1000
  years return periods based on the Korean seismic hazard map. Results are 
 given in the form of the spatial distribution of bedrock depth\, site peri
 od\, and site amplification coefficients\, which are particularly valuable
  in the context of a seismic vulnerability study. Many stone architectural
  heritages include masonry structures that appear to be vulnerable to hori
 zontal dynamic loads such as earthquakes. However\, such structures have s
 tood for thousands of years despite numerous historic earthquakes. This st
 udy proposes dynamic centrifuge modelling tests as a way of seismic risk a
 ssessment in order to find out how stone architectural heritages with maso
 nry structures endured the seismic load\, and whether there is any possibi
 lity of future earthquake damage. The seismic behaviour of a three-storey\
 , freestanding stone block structure was modelled and tested within a cent
 rifuge. Models were made at three different scales and dynamic tests were 
 conducted using differing centrifugal acceleration fields so that the beha
 viours could be transformed to an equivalent full-scale prototype and comp
 ared. This modelling of models procedure confirms that the seismic behavio
 ur of stone structures can be predicted using scaled-down models. Dynamic 
 centrifuge tests on one fifteenth scale models of three representative sto
 ne architectural heritages in Korea were conducted. The seismic behaviour 
 of the architectural heritages was then predicted in the event of earthqua
 kes.\n
LOCATION:Engineering Department - Lecture Room 6
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