-- Basement Slab Diaphragm Action
. The basement slab acts as a restraint for the perimeter retaining wall and a medium to transfer the lateral earth pressure to the lateral stability elements such as the core walls.
Although not covered by AS 3600, any chord members, collector reinforcement or drag bars used in diaphragm action
should be Ductility Class N reinforcement, because of the anchorage requirements and ductility demands for this reinforcement.
The model DV509-UV-LF diaphragm action
valve was designed for UV resins.
A sample timber frame diaphragm design was performed to provide building designers with methods for including diaphragm action when designing timber frame buildings to resist lateral loads and to develop an engineering rationale for the excellent performance of laterally loaded timber frame buildings.
Results have been used to develop a methodology that allows engineers and designers to quickly and easily calculate the forces present within post-frame structural elements and account for the diaphragm action of the roof and endwalls.
Differences between typical post-frame diaphragm action and SIP diaphragm action contributed to nonlinear increases in shear strength and stiffness observed in SIP diaphragm tests.
Previously discussed test results and analyses provided ample quantification of timber frame and SIP roof system behavior to allow designers to include diaphragm action as a means of reducing forces in timber frame members, and providing sound designs for timber frame and SIP structures subject to wind loads, as presented in the following examples.
Reductions in member combined stress values as a result of including diaphragm action of SIPs are shown in Table 2 as Model 2.
Member combined stress values as a result of including diaphragm action of SIPs utilizing data from testing at the University of Wyoming are shown in Table 2 as Model 3.
The Friday afternoon session will focus on individual frame analysis including commercial available analysis software--capabilities/limitations, applications to post-frame; incorporation of proprietary truss design software; sensitivity to modeling assumptions; accounting for diaphragm action
; loads and load combinations; and allowable stress calculations.
The diaphragm action
significantly reduces the cost of the bridge since the top of each pier would be braced in the transverse direction, permitting use of the slender columns and smaller footings.
Since rib cage and abdominal motion reflects, respectively, inspiratory rib cage muscles and diaphragm actions
(Aliverti et al., 2003; Gilbert et al., 1981), thoracoabdominal pattern of breathing has been used as an index of ventilatory muscle function (Gallego et al., 1997) and alterations of thoracoabdominal volumes during exercise have been investigated (Kenyon et al., 1997; Sanna et al., 1999; Vogiatzis et al., 2005).