Floor Diaphragm Nz

Palermo 1 andrew h.

Floor diaphragm nz. The basic shape of a. The diaphragm itself does not have a bracing unit rating but is used when bracing lines exceed 6m separation. And to satisfy the requirements of the new zealand loadings standard nzs1170 5 for estimating forces in diaphragms. No worse example exists than the ctv building in christchurch.

Rc floor diaphragms and their interactions with the. Timber framed floor and ceiling construction with standard or typical detailing can transfer lateral loads between bracing lines spaced up to 6 m or 7 5 m with dragon ties nzs 3604 2011. 5 floor diaphragm force method. Manufactured in new zealand by carter holt harvey woodproducts.

New zealand timber design ournal vol 23 issue 2 23 design of floor diaphragms in multi storey timber buildings daniel moroder 1 tobias smith 1 stefano pampanin 1 a. Iii abstract the magnitudes of seismic forces which develop in floor diaphragms were investigated in this report to enable the development of a desktop floor diaphragm force design method for use in a structural design office. Structural diaphragm if 6 m apart. Structural bracing and ceiling diaphragms 3 0 roofs and decks 4 0 flooring 5 0 note.

Buchanan1 1department of civil and natural resources engineering university of canterbury christchurch new zealand. Floor diaphragms form a critical component of seismic resistant buildings but unfortunately in the main their analysis and design in new zealand leaves much to be desired. Floor diaphragm strengthening of concrete structures with frp del rey castillo enrique1 kanitkar ravi2 and smith scott3 1lecturer university of auckland and concrete nz fellow 2principal kl structures 3professor of structural engineering university of adelaide summary elements of reinforced concrete rc structures such as beams columns and shear walls are. Floor or a normal flat plasterboard ceiling acting as a diaphragm.

A structural diaphragm is required for spacings wider than this. A gib plasterboard ceiling diaphragm is a stiff and strong horizontal element which will effectively transfer loads to connected bracing walls lines exceeding 6m or 7 5m with dragon ties to a maximum of 12m. Despite the critical importance of diaphragms there is a paucity of code provisions and design guidance relating to them. The diaphragm does not count in the bracing design for either level but is needed to connect the two levels together.

The general distributions of the forces which develop within the. The second part of this paper describes research that investigates the magnitude of transfer and total forces within reinforced concrete floor diaphragms of structures with vertical elements of varying stiffness.