Wood Floor Diaphragm Design
Seismic design of wood light frame structural diaphragm systems. Single family residential wood light frame construction.
Design rigidity means relative rigidity.
Wood floor diaphragm design.
Section 112 illustrates the design of the roof diaphragm and wall to roof anchorage for the masonry building featured in section 101.
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.
Paper number o19 floor diaphragms seismic bulwark or achilles heel 2014 nzsee conference jm.
Two idealized diaphragm behaviors are commonly used during design.
Design of the lateral force resisting system ie shearwalls and diaphragms must be approached from a system design perspective and is addressed in chapter 6.
Except that two 3 m x 10 m openings are required in the diaphragm for architectural reasons the rest of the building is the same as in design example.
The term diaphragm is usually applied to roofs and floors.
Scarry structural engineer auckland abstract.
The derivation of this term can be found in the atc 7 guidelines for the design of horizontal wood diaphragms applied technology council 1981 and in an internal apa document on diaphragm and shearwall deflection apa 1974 1977.
A shear wall however is a vertical cantilevered diaphragm.
Fema p752 nehrp recommended provisions.
Flexible diaphragm modeling and rigid diaphragm modeling.
A diaphragm is a flat structural unit acting like a deep thin beam.
Learn more about the force transfer around openings ftao method of shear wall analysis including downloadable ftao design tools.
A guide for practicing engineers 2 figure 1 2.
General wood metal deck concrete precast concrete horizontal bracing and other diaphragms.
Therefore this chapter focuses on structural design that specifies standard dimension lumber and structural wood panels ie plywood and oriented strand board sheathing.
Diaphragm as a beam.
For conditions where high diaphragm loads create shears exceeding those available from the ubc table you can use the high load plywood diaphragm program which uses icbo report 1952 for diaphragm design using 2332 plywood applied according to the reports requirements.
A 20 m x 30 m building has a wood diaphragm on cmu walls as shown in figure 1.
Section 111 features a three story wood frame apartment building.
For seismic design asce 7 10 section 1231 gives conditions under which the flexible diaphragm condition can be automatically used as well as additional requirements to justify the use of flexible diaphragms by calculation.
Design examples 11 2 this chapter examines the design of a variety of wood building elements.
Commercial and light industrial buildings constructed entirely of wood light frame construction often have a large plan area and are primarily of single story construction.
451 general figure 4 27.
The last term in the diaphragm deflection equation takes into account chord slip.
Wood diaphragm on reinforced cmu shearwalls neylon et al 2013.
45 procedures for diaphragms this section provides tier 2 evaluation procedures that apply to diaphragms.