STRUCLOSS 1.4 SOFTWARE
(Updated Version of KoeriLoss 1.0)
fahjan@gyte.edu.tr; fahjan@boun.edu.tr
StrucLoss 1.4 is an updated version of Koeriloss software. The updated version is developed by Earthquake and Structural Department of Gebze Institute of Technology, Turkey.
Four major developments are included in this version
KoeriLoss 1.0 is developed by the Earthquake Engineering Department of Bogazici University, Kandilli Observatory and Earthquake Research Institute (KOERI). The software applies a loss estimation methodology developed by KOERI to perform analyses for estimating potential losses from earthquakes. KoeriLoss Version 1.0 in its current form is capable to perform building damage estimation analysis using both intensity and spectral displacement based methodology. It is also able to estimate the direct economic losses and casualties related to building damages.
StrucLoss 1.4 is user-friendly software that operates through Geo-cells systems. Geo-cells (Grids) facilitate the manipulation of data on building stock, population and, earthquake hazards. The software is developed using the MapBasic language and runs efficiently under MapInfo software. Therefore, the software is fully integrated with MapInfo and capable to utilize the powerful features in displaying, querying, manipulating and mapping inventory databases. StrucLoss provides a great flexibility in displaying the outputs. Tables of building damages, social and economic losses can be easily mapped and displayed on the screen, printed or pasted into electronic documents.
StrucLoss Estimation Methodology is the basis for the algorithm used to develop the software. General algorithms for spectral displacement based loss estimation are shown in Figure 1.
Classification systems are essential to ensure a uniform interpretation of data and results. Building specifications used in the methodology have been developed to provide the ability to differentiate between buildings with substantially different damage and loss characteristics. The building inventory stocks can be classified using three categories:
-Structural systems category (I)
Example: I = 1 : RC frame building
I = 2 : Masonry building
I = 3 : Shear wall building
- Number of building stories category (J)
Example: J = 1 : 1 – 3 stories (including basement)
J = 2 : 4 – 6 stories (including basement)
J = 3 : > 6 stories (including basement)
- Construction Year category (K)
Example: K = 1 : Construction year: pre-1980 (included)
Example: K = 2 : Construction year: post-1980
Therefore any building type can be specified as I-J-K where I, J, and K refer to the structural system, number of stories and construction year of the building respectively. To specify a group of building type, wildcards can be used. If 0 is specified as I, J and/or K, all the building types of that group will be considered. The building classification system is discussed thoroughly in section 3.1.
The structural damage of the buildings are classified in four groups:
(1) Slight damage
(2) Moderate damage
(3) Extensive damage
(4) Complete damage
Casualties are classified in four categories of severity:
Severity 1
Severity 2
Severity 3
Severity 4
The deterministic hazard analyses are performed by computing the shortest distance between Grid Centroids to the provided fault segments. The earthquake magnitude may be provided externally otherwise the it will be calculated from the fault total length and Magnitude-length coefficients. The output results can be (PGA, PGV, spectral acceleration S0.2, S0.3, S1 and Intensity)
The software provides the building damage loss, economic loss and the number of casualties in terms of Geo-cells, sub-districts (Blocks) and districts as MapInfo Output tables.
StrucLoss software is a MapBasic application with a standard Windows interface, which provides a user-friendly environment. The software runs under MapInfo and is fully integrated to interact with MapInfo using Dialog form and Menu Item features.
StrucLoss software can be launched under MapInfo using the <Run MapBasic Program> feature from the standard menu bar of MapInfo. The main dialog of the software and the options used is shown below.
The main dialog provides features to specify different analysis options to control the input databases and analysis parameters. The main dialog also provides the user different features like the <Open Input File> icon which is used to open the input data tables, and the <Create Temp Data File> icon to control and check input files’ interpretation. To manipulate the data using MapInfo features, main dialog can be inactivated using the <Hide> icon. The vulnerability curves can be plotted by activating the vulnerability curves dialog using the <Vulnerability Curve Options> icon.
The main function of the menu bar item [StrucLoss] is to provide extra features to control the building parameters, vulnerability curves and analysis parameter options. The <UnHide Main Dialog> menu item provides the ability to reactivate the main dialog form.
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This dialog provides the choice to specify and change the number of the building groups used in the building inventory database.
In order to run spectral displacement based loss estimation, capacity spectrum or displacement coefficient methods can be selected. The default analysis parameters can be modified and output detailed analyses echo files options are provided in this dialog.
This dialog provides a mean to specify and change the number of the vulnerability curves classification system and to setup the range of the vulnerability curves plot options.
The standard Windows Open File Dialog is used to setup the filenames for different input tables and databases.
Vulnerability curves can be plotted for different types of building groups. StrucLoss provides line and area plots options. Sample plots are shown in Þekil 1.2-4 and Þekil 1.2-5.
To run the loss estimation spectral displacement based analysis, building, population and spectral acceleration databases should be specified.
To run the loss estimation spectral displacement based analysis, building, population and seismic intensity databases should be specified.
The software generates output database filenames automatically by adding extra characters to the input building inventory database name. The added characters represent the output region (Geo-Cell, Sub-district, District), the loss estimation method and the loss estimation type (building damage, economic cost, and fatality). The user can modify the output database filenames.
Status bar demonstrates the analysis processing status in percentages. The analysis can be halted by using the <Cancel> icon.
Different samples of the input databases are shown below
Sample outputs for building damage losses, economic losses and the number of casualties in terms of Geo-cells, sub-districts and districts are shown below
Area plot for vulnerability curves
Line plot for vulnerability curves
Building inventory input database
Input seismic spectral acceleration database
Input seismic intensity database
Vulnearbility parameters Input table
Capacity curves parameters for different building types
Economic loss damage values for different building types
Casualties Loss ratios for different severities and building types
Building damage output database for districts
Casualties output database for Geo-cells
Economic loss output database for sub-districts
Detailed intensity based analysis echo file
Detailed spectral displacement based analysis echo file
