TECHNICAL FIELD

The invention relates to the durability determination method, which can determine the earthquake resistance of structures without damaging the structure.

In particular, the invention relates to a method that enables the durability of the structure to be determined by placing triaxial digital accelerometers in the measurement areas of the structure to be examined, recording the micro-vibrations that exist naturally on the structure and analyzing the data of these recorded data.

PRIOR ART

Since earthquakes are natural disasters, it is not possible to prevent earthquakes, but damage to structures as a result of earthquakes can be prevented. In the earthquake performance test of the structures around the world, the companies that perform the earthquake performance test of the structure with core are insufficient.

In the current technique, companies perform earthquake performance tests of structures by taking samples with cores. The structure is damaged as a result of taking samples with core. In these damaged earthquake performance test applications; concrete class control cannot be determined 100%. Because 15-20% of the structural system elements on each floor of the building are tested by taking samples with a core.

Another problem in the current technique is the floor and/or carrier elements added to the structure later. These floors and/or carrier elements can be of different concrete classes and/or different sizes. This situation may cause different/false results in test methods taken with core samples.

It is known that in the test methods in which core samples are taken, reinforcement samples cannot be taken from each of the structural system elements of the building, and very few reinforcement samples are taken in the building floors. As a result of this situation, the reinforcement control of the building is incomplete.

In the test methods taken with core samples, it is not possible to fully reflect the corrosion of the reinforcements in the structure with the scrapings made for an extremely limited number of floors and carrier elements. For this reason, the inadequacy of the measurement results arises.

Environmental factors (temperature, humidity, wind, vibration, etc.) are not taken into account and are neglected during the analysis in the test methods performed by the current technique in which samples are taken with core drilling. This situation leads to poor results.

In the current technique, in the test methods where samples are taken with core drilling, since the sample point is damaged, this area is repaired (with repair mortar). However, the strength of the carrier system at this point cannot regain its former state and causes deformation in the structure.

The high cost of the core test methods performed in the current technique causes the occupants to avoid testing for this cost.

In the test methods in which core samples are taken, most of the time, core samples are not taken from the foundation of the building, so the soil-structure interaction is not taken into account.

In the test methods in which samples are taken with core drilling, it is not possible to detect all damaged areas as a result of the analysis. By making generalizations over a few samples taken, a result is obtained about the durability of the building. This makes the results questionable.

Applications made by taking samples with cores cannot be applied in all types of structures (masonry, tunnel formwork, steel structures, etc.). This situation causes these structures to not be tested and creates security vulnerability. In the current technique, no measurements can be made in accordance with international ISO standards and no results can be given in the test methods in which samples are taken by core drilling.

In test methods in which samples are taken with core drilling, sampling, testing, analysis time and evaluation phases take a long time. This situation creates a huge security gap considering the possibility of aftershocks.

Another test method used in the current technique is the strength test, which is measured by creating artificial vibration on the structure by means of sensors. An artificial vibration is required for this test. After this application, results and reporting can be provided. However, the data analysis method followed differs. In addition, additional devices are needed during frequency generation with artificial vibrations. The natural vibration period of the structure and the frequency of artificial vibration; can create resonance, so this method (by creating artificial vibration) can cause great damage to the structure.

As a result, in order to eliminate the disadvantages described above, the need for a multifunctional, durability test method that is much safer and has various advantages compared to similar ones, and the inadequacy of existing solutions made it necessary to make a development in the relevant technical field.

OBJECTIVE OF THE INVENTION

The aim of the invention is to measure and detect the micro-level vibration created by the building itself and its environmental effects by the accelerometers connected to the building decks, and to reveal the vibration information caused by the areas with weak resistance, if any, from this data set.

The most important purpose of the invention is to enable testing of structures in earthquake performance tests without damaging the structures.

Another aim of the invention is to provide control of the carrier system with the method performed. All of the structural system elements on each floor of the building are determined precisely by the definition of the data received from the accelerometers, thanks to the applied method.

Another aim of the invention is to add floors and/or load-bearing elements, which are added to the structure later, to different concrete classes and/or different sizes. In the method applied with the invention, all kinds of elements added to the structure can be detected as a result of the analysis. With the invention, the situation analysis of all the reinforcements in the building floors is provided by the method of the invention, without the need to take reinforcement samples from the structural system elements of the building.

With the invention, there is no need to scrape any part of the carrier system of the structure. Because all the reinforcements of the structure are included in the calculations as a result of the analysis with the existing corrosion conditions.

Another aim of the invention is to define the existing loads in terms of mass with the data obtained from accelerometers, taking into account all the environmental factors (temperature, humidity, wind, vibration, etc.) in the building.

Another aim of the invention is to enable the detection of all damaged areas as a result of the analysis. The invention can be applied to any type of building (masonry, tunnel formwork, steel structures, etc.).

Another aim of the invention is to provide analysis results for each independent part of the structure by changing the location of the accelerometers.

DETAILED DESCRIPTION OF THE INVENTION

The inventive system is a complex system that obtains dynamic parameters of structures only from response measurement data (acceleration, velocity or displacement).

The acceleration, velocity or displacement response data taken from the structure are first processed and made ready for analysis. Then, the mathematical model of the structure is obtained from these data. With the method followed for the invention, the mathematical model of the structure is determined by processing the input-output data of the acceleration values obtained from the character points of the structure with the accelerometer sensors. On this mathematical model, the dynamic behavior of the mathematical model modeled for the maximum acceleration value taken from the ISO standards and the earthquake code of the relevant country is revealed, and the earthquake performance of the structure in the regulation is revealed as a score. This procedure, which has been explained, can be carried out in the same way for all countries in the world in ISO standards. The invention is able to reveal the damaged areas of the damaged structures, as well as to simulate the strengthening of an existing structure, that is, to increase its score; on the other hand, it enables the performance of a repaired structure to be observed after the repair. By comparing the mathematical model of the building, which is formed from the input-output values obtained from the accelerometer data, according to the earthquake code of the relevant country, the elements that do not provide the limit values are revealed. The earthquake performance score value is revealed by comparing the mathematical model of the building created after the repair according to the earthquake code of the relevant country.

Although earthquake performance is mentioned, it is possible to verify whether an existing new structure complies with the earthquake regulation of the relevant country, in accordance with the ISO standard.

Vibration effects are taken into account with the method in the invention, and together with the measurement of vibrations, temperature, humidity, wind, etc. By accepting external effects as input data, the detailed performance of the building against these effects can also be revealed.

In summary, the invention is a durability determination method that can determine the earthquake resistance of structures without damaging the structure, and in this method; Placing three-axis digital accelerometers in the measurement areas of the building to be examined, recording data by creating a frequency of micro vibrations that are constantly present on the structure or by vibration applied from the outside to the structure, recording in a time suitable for the type of building, examining the acceleration values and inspecting the compliance with ISO standards, collection, extracting trends from acceleration values, removing noise from acceleration values, defining the input and output data of the processed acceleration values, creating a mathematical model of the structure in accordance with the input and output data, defining the mathematical model of the created structure as the input data of the maximum acceleration value taken from the earthquake hazard maps of the relevant country , determining the values as earthquake performance scores for the relevant country, reporting the results in ISO standards and presenting the process steps are followed.