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 Earthquake Data
Introduction Earthquake Data
Chichi Earthquake & Chelungpu Fault
The Chelungpu fault cross Guangfu elementary school, Wufeng , Taichung County
Introduction Earthquake Data
Building Damage Survey Report
8,773 buildings were surveyed in preliminary report
Introduction Earthquake Data
incomplete
Building Damage Ratio
=
(Buildings)
=
(Buildings)
No suitable database
Introduction Earthquake Data
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 Earthquake Data
Use Base Area to Measure Building Damage
One Building
Base area
Overview of Building Damage in the Chichi Earthquake Earthquake Data
Structural Type Distribution of Totally Collapsed Buildings
Overview of Building Damage in the Chichi Earthquake Earthquake Data
Collapsed Ratio for Each Structural Type
Overview of Building Damage in the Chichi Earthquake Earthquake Data
Collapsed Ratio of Reinforced Concrete Buildings in Different Construction Periods
Estimation of Strong Ground Motion Earthquake Data
Distribution of Accelerometer Sites(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 Earthquake Data
Attenuation Model  Campbell FormCoefficients of different strong motion factors
Estimation of Strong Ground Motion Earthquake Data
=correction factor
= number of observation (103sites)
= data of Chichi earthquake
= data of Campell form
Correction Factor for Campbell Form (Tsai, 2001)Estimation of Strong Ground Motion Earthquake Data
Campbell Form Including Correction FactorChichi earthquake records (103 stations)
Estimation of Strong Ground Motion Earthquake Data
Geostatistic TheoryEquation of horizontal attenuation relationship
Trend
Kriging
Residual
Estimation of Strong Ground Motion Earthquake Data
Ordinary Kriging System (Semivariogram)Data interval : 2500 M
h
Distance (M)
Estimation of Strong Ground Motion Earthquake Data
Estimated PGA Distribution in Recover Region
PGA(gal)
Taichung County
Taichung City
Nantou County
Chelongpu fault
Fragility Curve for Building Damage Earthquake Data
Fragility Curves
Fragility Curve for Building Damage Earthquake Data
Study region – 15 Km buffer of Chelungpu fault lineFragility Curve for Building Damage Earthquake Data
Fragility curves of the different structural types – totally collapsed
Fragility Curve for Building Damage Earthquake Data
Fragility curves of RC building for three different construction periods
NearFault Area Earthquake Data
Hanging Wall
Foot Wall
Puli Basin
BuildingSeismic Risk Analysis
Topographical Classification of Nantou County
Building Earthquake DataSeismic Risk Analysis
CDF of estimated PGA for different topographic conditions
Topographic Condition Earthquake Data


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
Building Earthquake DataSeismic 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 distribution and is also called reliability index.


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 distribution and is also called reliability index.
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
Building distribution and is also called reliability index.Seismic Risk Analysis
Actual Damage vs. Risk Analysis
Risk level
Actual damage level
Building distribution and is also called reliability index.Seismic Risk Analysis
Error of Risk Analysis>
Conclusions distribution and is also called reliability index.
HazTaiwan
Thank You for Your Attention distribution and is also called reliability index.