Buildings Cracks Classification Using Zoning and Invariant Moment Features and Quadratic Discriminant Analysis Classifier

Aldian Wahyu Septiadi,Fitri Bimantoro,I Gede Pasek Suta Wijaya,Ida Bagus Ketut Widiartha

doi:10.24843/lkjiti.2019.v10.i03.p04

Aldian Wahyu Septiadi, Fitri Bimantoro + Show 2 more

Open Access

https://doi.org/10.24843/lkjiti.2019.v10.i03.p04

Copy DOI

Abstract

Natural disasters such as earthquake often cause cracks in buildings and even demolish them. The cracked building must be assessed by an expert to determine whether the building is still suitable for use or not. The feasibility of a building is assessed based on the width, depth, and length of cracks in walls, beams, columns, and even the floor of the building. Only experienced experts can do such kind of task so that building assessment requires many structural engineering experts when an earthquake has happened. However, structural engineering experts are limited which able to do buildings assessment in the area affected. Therefore, the research based on a pattern recognition approach is conducted to classify cracks in buildings to be mild, moderate, or severe. It will be part of automatic building assessment based on the crack analysis. An alternative pattern recognition approach for classifying buildings cracks is a scheme based on zoning and shape features and Quadratic discriminant analysis (QDA) classifier. Based on the experimental results the proposed scheme gives reasonable achievement more than 80% of accuracy.

Highlights

Earthquake is vibrations that occur on the surface of the earth due to the sudden release of energy, which creates seismic waves
An alternative pattern recognition approach for classifying buildings cracks is a scheme based on zoning and shape features and Quadratic discriminant analysis (QDA) classifier
Several experiments were carried out to find out the best variation of features of zoning and shape features for QDA classifier

Summary

Introduction

Earthquake is vibrations that occur on the surface of the earth due to the sudden release of energy, which creates seismic waves. Tectonic movements and volcanic eruptions usually cause earthquakes. Earthquake magnitude is measured by using the Richter Scale (RS). An earthquake measuring more than 5 RS has potentially caused cracks and even demolish buildings. Certain cracks in buildings (mild, moderate, or severe) are indicative of the failure rate of the structure of the building. Crack is a symptom due to the many combinations of forces acting on the building that exceed the capacity of the building or its material components [1]. The level of damage to buildings can be seen from the shape of the cracks that can be assessed by experts during assessment activities. The building assessment activities can be carried out through two stages, namely the initial inspection and detail inspection through a series of tests before concluding in the reliability assessment. Several standards and manuals must be available, which must be used as references

Methods

Findings

Discussion

Conclusion