MaSTER FRAME® Method, Method is an innovative structural reinforcement technique developed in Japan as a result of long R&D studies.In this method, structure is strengthened against earthquakes by attaching additional reinforced concrete frames to the existing structural system of the building, and this process continues while the building is used on daily basis. This method is used in over 40 buildings in Japan. Numerous engineering , design and application projects involving this method continue in Turkey
MaSTER FRAME Uygulama Öncesi

MaSTER FRAME® Before Construction

MaSTER FRAME Uygulama Aşaması

MaSTER FRAME® During Construction Works

MaSTER FRAME Uygulama Sonrası

MaSTER FRAME® After Construction

Advantages of MaSTER FRAME®

Since the reinforcement is made from the outside of the building, construction staff do not have to enter the building. Retrofitting work can be performed while the use of the structure continues.
Special anchors (MaSTER Disk-Ankraj®) are used; thus noise, dust and vibration are reduced during the construction work.
It is a cost competitive system compared to the existing shear wall reinforcement method.
The construction period is shorter compared to the conventional shear wall reinforcement method.
The MaSTER FRAME® Method is easy to apply and very suitable for construction practices in Turkey.
MaSTER FRAME®, can be used together with other structural retrofitting methods when necessary. This system is suitable for hybrid solutions with retrofitting members such as steel bracing and damper.

What Does MaSTER FRAME® Enable?

Construction staff do not need to enter the building since the work is carried out from outside while the building is still used on daily basis.

 
In factories, production continues without interruption,
In schools, education continues without suspension ,
In hospitals, health services are not interrupted,
In dwellings and offices, reinforcement process is completed without the need for the people to move out,
In administrative in buildings , warehouses , etc., the function of structure is not interrupted.

Shorter Construction Period and Reduced Noise, Dust and Vibration:

It is applied without damaging the existing structural system (columns, shears, beams, etc.) and demolishing the building. Thus, retrofitting work is performed without reducing the load - bearing capacity of the existing structure.
Architectural repair is not necessary as the existing structural system is not damaged. The financial burden of re-construction of the walls and related finishing and mechanical works is eliminated.
Retrofitting work is independent from finishing works (if there are such works that must be performed inside the building). This brings flexibility to the compulsory architectural repair (finishing works) schedule: It can be carried out in parallel with the retrofitting, or it can be divided into periods that will not disrupt the function of the building.
MaSTER Disk-Ankraj® is a special anchor (post-install type adhesive/bonded anchor) under patent protection and is a key material of the MaSTER FRAME® method. In addition to high shear strength and high performance in low strength concretes, fewer anchors are used in comparison to conventional anchors, providing economic and fast solution.

Advantages of MaSTER Disk-Ankraj®

High Shear Strength

Use of Fewer Anchors

Minimum Damage on the Structural System

Less Dust , Noise and Vibration During Installment

High Shear and Pull-out Performance in Low Strength Concretes

High Performance in Low Embedment Depth (160 mm ～ )

Difference in installation between conventional anchor and MaSTER Disk-Ankraj® in a similar combination.

Shear Strength of MaSTER Disk-Ankraj®

MaSTER Disk-Ankraj® is a patented special anchor (post-install type adhesive/bonded anchor) and has high shear strength even in low-strength concretes. Thanks to its high shear strength, MaSTER Disk-Ankraj® offers installation opportunity with fewer anchors and shorter embedment depth in comparison to conventional anchors. The high shear strength of MaSTER Disk-Ankraj® has been confirmed by extensive tests carried out in Istanbul Technical University Structural and Earthquake Engineering Laboratory
According to the result of ITU Structural and Earthquake Engineering Laboratory Test, it has high shear strength in low-strength concrete (7.94 MPa) with low embedment length (192 mm).

Residual Pull-Out Strength of MaSTER Disk-Ankraj®

In addition to its high shear capacity, MaSTER Disk-Ankraj® also has a high residual pull-out capacity in proportion to the embedment length of the anchor. Thanks to its special form, MaSTER Disk-Ankraj® has high pull-out strength even after shear failure. The high pull-out strength of MaSTER Disk-Ankraj®, even after the shear failure, has been confirmed by extensive experiments conducted in Istanbul Technical University Structural and Earthquake Engineering Laboratory
According to the result of ITU Structural and Earthquake Engineering Laboratory Test, it has high shear strength in low-strength concrete (7.94 MPa) with low embedment length (192 mm).

MaSTER Disk-Ankraj® Installation

Contrary to the hammer drilling used in the installation of conventional anchors, for the installation of MaSTER Disk-Ankraj®, the holes are drilled in the existing structural members by special diamond bit core drilling machines, and the work is completed without damaging the existing structural members during installation. With a low embedment length starting from 160 mm, hammer drilling is not necessary unlike conventional anchors.

Drilling the MaSTER Disk-Ankraj® core by a special diamond core bit drill.

Special diamond core bits developed for MaSTER Disk-Ankraj® installation allows;

Less dust, noise and vibration during execution.

Execution while the building to be retrofitted continues to function.

Optimal solution for dust and vibration sensitive structures.

Minimal damage to existing structural members

Working without the need for hammer-drill

Other Areas of Use of MaSTER Disk-Ankraj®

- Concrete-Steel Connection for Retrofitting Members–

In addition to the MaSTER FRAME® method, MaSTER Disk-Ankraj® is also used as a fastening element in the assembly of the retrofitting members used to strengthen the structures to the existing building. Especially where there is an effective transfer of shear force in the anchorage of the retrofitting members to the structural system of the existing building, MaSTER Disk-Ankraj® provides secure connections by shorter embedment length and fewer installations.
Use of MaSTER Disk-Ankraj® as a fastener in a joint where high shear force is transferred.