Building Reinforcement
We offer solution partnership with ISO quality in the field of "project-specific" building reinforcement.
What is Building Reinforcement?
Building retrofitting (building retrofitting) is the repair of buildings damaged by natural disasters such as earthquakes, etc. or for the purpose of strengthening and improvement of buildings against possible damage. The terms repair and retrofitting are often confused.
- The operations carried out to bring a damaged building or structural element to a prescribed level of safety are called repair.
- The operations carried out to raise an undamaged structure or structural element to a valid level of safety are called strengthening.
- In building reinforcement processes, it is necessary to be very careful from project design to implementation. Experienced people who are experts in their work should be worked with. Because careless and unconscious building reinforcement can increase the risks of the building instead of reducing them.
When is there a need for repair and/or reinforcement?
- When there are unforeseen increases in the live loads acting on the structure,
- Building retrofitting regulations and specifications have to be changed,
- When it creates structural risk with faulty workmanship and inadequate use of materials during construction,
- When there is a need to widen bridges and overpasses,
- When the intended use of the building is changed and used more intensively,
- In buildings, repair and strengthening is needed when the structural elements wear out due to external factors over time and lose their bearing capacity.
How is building strengthening done?
Different methods are applied in building reinforcement. These methods vary according to the area that is damaged, deformed or in danger of collapse. Damaged structures can generally be strengthened by carrying out regional (local) works. The strengthening apparatus to be used varies according to the condition of the building.
Buildings may be damaged for various reasons. For example; In cases such as earthquakes, ground problems, structural fatigue and various accidents, reinforcement procedures may be required. Especially in historical buildings or buildings that have been worn out over time, there is a need to use building reinforcement systems.
Stages of Building Strengthening System
- The condition of the buildings is determined by on-site exploration.
- Concrete sample is taken from the building and tested.
- The durability of concrete is determined for earthquake resistance.
- A building strengthening project is created and the strengthening system to be applied is decided.
What are Building Strengthening Methods?
Building reinforcement methods used as publications according to the characteristics of the buildings are as follows;
- Sheathing or lining,
- Wing attachment,
- Fusing new and old concretes,
- Column sheathing,
- Steel sheathing,
- Reinforced concrete sheathing,
- Epoxy injection.
What are the Types of Building Reinforcement?
Building reinforcement systems differ according to the region to be applied. Applications such as beam strengthening, column strengthening and system improvement (steel cross) can be used according to the condition of the structures.
Beam Reinforcement
This method, which is used for strengthening of beams, is used for beams with insufficient shear strength. This strengthening work is applied as follows;
- Firstly, the required number of stirrup rods are added to the two faces of the beam from the outside.
- The bars are connected by bolts to the steel profile mounted under the beam.
- The rods are threaded through the holes drilled in the overlying slab.
- It is then bent into the slot opened on the slab.
- Then the gaps opened in the concrete are filled with concrete.
- This method can also be applied with the same principles using different details.
- Externally added stirrups have no wrapping effect.
- The stirrups are useful for shear strength; they do not increase the ductility of the beam section.
- In this application, the profile and bolts must be protected against external influences.
Column Reinforcement
In this method used to strengthen the columns, the corners of the columns are reinforced with steel wraps. This reinforcement work is applied as follows;
- Firstly, 4 brackets are placed on the corners of square or rectangular reinforced concrete columns longitudinally.
- Then the brackets are welded with horizontal plates arranged at certain intervals.
- Make sure that there is no gap between the brackets and reinforced concrete surfaces.
- Horizontal plates should be positioned so that they are continuous on all four surfaces.
- In order for the steel wraps to increase the axial load capacity of the column, the corners should be spaced between the upper and lower slabs, i.e. they should be continuous.
- If it is deemed necessary to reduce the axial compressive load of the existing reinforced concrete column section due to vertical loads, preload is applied to the brackets.
Steel Reinforcement
When applying the steel reinforcement method, steel lamellas are wrapped around the columns and beams and reinforcement is provided. The method is a widely used method and is also preferred by our company in some buildings. It is more preferred in buildings with a lower rigidity target and the main reason for this is that it is a more ductile material than reinforced concrete. It is also possible to find many applications where steel slats are used together with reinforced concrete reinforcement. In order for this to be preferred, the static condition of the structure should be analysed.
The variety and number of personnel in steel structure reinforcements is unquestionably less than in reinforced concrete structures. For several years, urbanisation projects have started in our country. We hear through communication channels that there are difficulties in the demolition of existing reinforced concrete buildings. Fatal occupational accidents, long-term and costly demolitions, numerous damages to the environment, etc. many more undesirable events are experienced. These problems are minimised in steel building reinforcement.
System Improvement - Steel Cross
It is a strengthening method made with steel diagonals between two column axes. It is not suitable for the buildings in our country. In this strengthening work, attention is paid to the following;
- Steel diagonal systems are applied between two column axes. For this reason, it is not suitable for use in buildings in our country.
- In order for the system to transfer load and operate with high performance in earthquakes, the concrete quality must be at least "16 Mpa". However, according to statistics, the value of the structures in Turkey is below "10 Mpa".
- In addition, steel diagonals transfer the forces to the column-beam joints; therefore, in severe earthquakes, they can cause major damage to unbraced joints.
Bayrakci Metal Building Reinforcement Systems
Bayrakcı Metal offers building reinforcement solutions within the framework of ISO quality standards. We design and implement your reinforcement requests in any part of the buildings in a short time. Our company, which serves with building reinforcement equipment in accordance with international standards, is among the leading companies in this field.
We offer special building reinforcement systems and applications for your company with options suitable for your budget. Visit us, tell us your needs, examine our building reinforcement systems, decide!
You can contact us at içintalep@bayrakcimetal.com.tr for special design requests, building reinforcement system with the features you want. You can also contact us by filling out the form in the "Contact" section or via our phones. We provide service to all parts of Turkey, especially Istanbul.
