Stability design is a very important discipline in Structural Engineering field. Timber structure has been in use for many years, but it is very difficult to stabilise the structure if go for multi storey structure in that.
There has been a growing trend within construction and architecture to use timber in structural design. It is seen as aesthetically pleasing and more environment friendly alternative to steel and concrete. Timber products, such as, glued laminated timber (glulam) and cross-laminated timber (CLT) are increasingly becoming more commonplace as they are strong, light and easily assembled.
A number of key points that must be looked some are like analysing the loads acting on the building, specifically the calculation of lateral wind loads and their effect on stabilising cross laminated timber panels.
Cross Laminated timber panels are made up of multiple layers of C24 grade timber panels and are glued together at alternating 90 degrees. Width of 1.2m and length of 12m is taken. These are connected together in the factory to produce prefabricated walls, openings etc.
Stability:While designing CLT walls for stability, walls must withstand the overturning, shear forces and sliding that occur due to lateral loads. According to ECO, 3.3, checks must be performed for:
Global (whole building) overturning
Individual wall panel overturning
Individual wall panel sliding
Individual wall panel shear
Calculation can be done by various method , one such is using hand called MathCAD application. One stabilising wall would be focussed on running the whole height of the building. MathCAD is used in such a way that the variables are used before they are used.
Various steps involved are :
Choosing the stabilising wall
Loads analysis of exterior wall
Ultimate Limit Stess
Stability Checks (as mentioned earlier)
Calculation and determination of design loads.
Design of Exterior Walls
Homogeneous and non-homogeneous properties of the material
Combined axial & bending checks
Kit required to develop Stability Design of Multi-Storey Timber Structure: