ust for clarity, the effective lengths are a design issue, and P-Delta is an analysis issue. So you don't need to worry about effective lengths for a P-Delta analysis, but you will need to consider effective lengths when you get to the design stage, if your design code or standard requires their use. The alignment charts for braced and unbraced structures are the most common way that i am aware of for determining the K factors for buckling about each axis.
You should be able to use the Ky parameter to specify the K factor for buckling about the local y axis, Kz parameter to specify the K factor for buckling about the local z axis, Ly parameter to specify the length to use when determining KyLy/ry, and Lz parameter to specify the length to use when determining KzLz/rz. To the best of my knowledge, these design parameters were available in STAAD.Pro 2006.作者:
sunpower 时间: 2012-5-18 08:14
关于计算长度的回复，bently明确指出，计算长度系数，软件不自动计算，需要人为指定。
Performing a P-Delta analysis does not eliminate the need to assign effective lengths for columns. The P-Delta analysis addresses secondary effects in members due to interstory drift and member deflection. Column effective length factors address column stability/buckling, which is a separate issue. STAAD.Pro does not compute the effective lengths of columns in a frame automatically.作者:
cloversly 时间: 2012-5-18 16:32
