2. When would you use Unreinforced Masonry Testing?
URM testing will be very useful when structural engineering consultancies are required to perform retrofitting design on URM structures. URM structures have been shown to perform poorly during earthquakes and it is now mandatory to strengthen these structures in the most seismically active regions in New Zealand, such as Wellington and the Canterbury area. Our service can provide the information required by the design engineers to perform their calculations for the retrofitting purpose.
3. What are the Benefits of Unreinforced Masonry Testing?
Just like any other construction materials, it is important to know the actual properties of the masonry units constituting the concerned structures before any reliable retrofitting design can be performed. However, masonry structures, especially those composed of clay bricks or stones, are so inhomogeneous that their strength properties highly depend on a range of factors, primarily workmanship. It is not advisable to perform the retrofitting design using the value of these strength parameters obtained from literature. Through our service, the representative value of these parameters can be provided. Beside the information obtained through scanning, the following strength parameters required for retrofitting design can be obtained through the services above
- The shear strength of the mortar bed joint under different axial load intensities
- Single unit as well as prism masonry compressive strength to see the slenderness effect
- Anchor pull-out or shear capacity of the masonry unit through anchor test. Anchors are the means of attaching structural steel members to masonry structures required for strengthening.
When the representative values of these parameters are known, design engineers can perform their retrofitting design with higher confidence.