This option is used to determine additional code parameters of a steel member type for the Japanese code AIJ-ASD 05. It is available after pressing the More button in the Member Definition - Parameters dialog box.
Options in the above dialog box enable definition of additional parameters of a member:
- section factor (for a section subjected to axial forces):An/A ratio of areas - the option is used to define the ratio of the net area of a section which includes bolt openings to the gross area of a section. This data is used by the program for verification of a member due to tension according to point 6.2 of the code
- eccentricity effect for angles and C-sections one-sided connected to the gusset plate - if this option is switched on, then the effective cross-sectional area for tension will be evaluated automatically according to the principles given in point 12.1 of the code
- section factors (for a section in bending): the ratios Wny/Wy and Wnz/Wz - the option is used to define the ratio of the net section modulus (for a section including bolt openings) to the gross section modulus. The factors are considered in the calculations during verification of the member section ratio according to point 6 and the guidelines of point 9 of the code.
In the lower part of the dialog box additional conditions for round sections may be determined: unidirectional bending. If the option is activated, then during calculations of a member with round-section subjected to bi-axial bending, the moments My and Mz are replaced by a resultant moment being their vector sum. From that moment on the program treats the member as a member subjected to unidirectional bending.