Development of Hazard Damaged Buildings Model by ChiChi Earthquake Data. B. J. Lee College of Construction and Development Feng Chia University Nov. 17, 2003. Contents. Introduction Overview of Building Damage Estimation of Strong Motion Fragility Curves for the Building Damage
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Development of Hazard Damaged Buildings Model by ChiChi Earthquake Data
B. J. Lee
College of Construction and Development
Feng Chia University
Nov. 17, 2003
Contents
Introduction
Chichi Earthquake & Chelungpu Fault
The Chelungpu fault cross Guangfu elementary school, Wufeng , Taichung County
Introduction
Building Damage Survey Report
8,773 buildings were surveyed in preliminary report
Introduction
incomplete
Building Damage Ratio
=
(Buildings)
=
(Buildings)
No suitable database
Introduction
Building Damage Database
List of earthquake building
subsidy
Partially & Totally
Collapsed Building
Database of Building Tax
(inventory of buildings)
Address
Type of Structure
Floor Area
Name
Construction Period
……
Chichi Earthquake
Building Damage
Data Warehouse
Overview of Building Damage in the Chichi Earthquake
Use Base Area to Measure Building Damage
One Building
Base area
Overview of Building Damage in the Chichi Earthquake
Structural Type Distribution of Totally Collapsed Buildings
Overview of Building Damage in the Chichi Earthquake
Collapsed Ratio for Each Structural Type
Overview of Building Damage in the Chichi Earthquake
Collapsed Ratio of Reinforced Concrete Buildings in Different Construction Periods
Estimation of Strong Ground Motion
(Miaoli、Taichung、
Nantou、Jiayi、Yunlin and
Changhua)
sites : 103
Max=989.22 gal
Avg.=214.62 gal
St.Dev.=177.492 gal
Estimation of Strong Ground Motion
Coefficients of different strong motion factors
Estimation of Strong Ground Motion
=correction factor
= number of observation (103sites)
= data of Chichi earthquake
= data of Campell form
Estimation of Strong Ground Motion
Chichi earthquake records (103 stations)
Estimation of Strong Ground Motion
Equation of horizontal attenuation relationship
Trend
Kriging
Residual
Estimation of Strong Ground Motion
Data interval : 2500 M
h
Distance (M)
Estimation of Strong Ground Motion
Estimated PGA Distribution in Recover Region
PGA(gal)
Taichung County
Taichung City
Nantou County
Chelongpu fault
Fragility Curve for Building Damage
Fragility Curves
Fragility Curve for Building Damage
Fragility Curve for Building Damage
Fragility curves of the different structural types – totally collapsed
Fragility Curve for Building Damage
Fragility curves of RC building for three different construction periods
NearFault Area
Hanging Wall
Foot Wall
Puli Basin
BuildingSeismic Risk Analysis
Topographical Classification of Nantou County
BuildingSeismic Risk Analysis
CDF of estimated PGA for different topographic conditions
Topographic Condition


Hanging wall
Foot wall
Nearfault line
Basin


5.99
5.88
6.11
6.07


0.20
0.22
0.21
0.05
RC
Before 1982
6.76
0.48
7.29%
4.85%
11.05%
7.84%
1983~1989
6.87
0.45
3.83%
2.37%
6.38%
3.87%
After 1990
7.06
0.55
3.53%
2.33%
5.45%
3.72%
Reinforced Masonry
6.72
0.44
6.79%
4.36%
10.73%
7.17%
MudBrick
6.19
0.33
30.50%
21.23%
41.88%
35.72%
Masonry
6.48
0.40
13.78%
9.13%
20.59%
15.19%
BuildingSeismic Risk Analysis
BuildingSeismic Risk Analysis
BuildingSeismic Risk Analysis
Risk probability
Risk probability of building damage refers to the probability when resistance of the building against strong motion index ( ) is smaller than significance of strong motion ( )
The stands for the cumulative probability distribution and is also called reliability index.
BuildingSeismic Risk Analysis
Risk probability
Topographic Condition


Hanging wall
Foot wall
Nearfault line
Basin


5.99
5.88
6.11
6.07


0.20
0.22
0.21
0.05
RC
Before 1982
6.76
0.48
7.29%
4.85%
11.05%
7.84%
1983~1989
6.87
0.45
3.83%
2.37%
6.38%
3.87%
After 1990
7.06
0.55
3.53%
2.33%
5.45%
3.72%
Reinforced Masonry
6.72
0.44
6.79%
4.36%
10.73%
7.17%
MudBrick
6.19
0.33
30.50%
21.23%
41.88%
35.72%
Masonry
6.48
0.40
13.78%
9.13%
20.59%
15.19%
BuildingSeismic Risk Analysis
Risk probability
å
m
w
N
=
Pi
k
kl
k=1
k = building category
l = indicates the subsurface soil condition
Nk = ratio of buildings with category k
w kl = risk probability of building category k on soil condition l
BuildingSeismic Risk Analysis
BuildingSeismic Risk Analysis
BuildingSeismic Risk Analysis
Actual Damage vs. Risk Analysis
Risk level
Actual damage level
BuildingSeismic Risk Analysis
>
Conclusions
HazTaiwan
Thank You for Your Attention