CSI SAP2000 22.0.0
Size: 767 MB
Size: 767 MB
New Features:
Multiple copies of the same model can now be run on different machines, and the analysis results merged together on a single machine for performing design and processing results. This can be particularly useful for running a large number of load cases (e.g., earthquakes for performance-based design, P-delta load cases for design by the Direct Analysis Method, etc.), and there are multiple machines available for running different load cases simultaneously.
An enhancement has been implemented in the concrete frame design codes ACI 318-14, ACI 318-11, and ACI 318-08 in which the delta_ns factor is now limited to 1.4 based on sections 6.2.6 and 6.6.4.5.1 of ACI 318-14, section 10.10.2.1 of ACI 318-11, and section 10.10.2.1 of ACI 318-08.
An enhancement has been made to the steel frame design codes Eurocode 3-2005, Italian NTC2008, and Italian NTC2018 in which the expression of Mcr is now being calculated according to Equation F.2 in Section F.1.2 of EC3:1993. It includes the C2*zg and C3*zj terms, where zg is the distance between the load application point and the shear center (zs), zj is defined in EC3:1993 Section F.1.2, and C2 and C3 are coefficients which depend on load conditions. Previously these terms were ignored and a simplified version of the formula for Mcr was being used. The term C2*zg considers the destabilizing effect of a compressive load placed on top of the beam and that passes through the shear center. This term can be ignored when either the bending moment diagram is linear along a part of a member due to restraints or when the load is applied at the shear center and therefore no destabilizing moments can occur. However, the term C2*zg cannot be assumed as zero for simply supported beams without lateral restraint and with the load applied at the top or bottom flanges. The second term C3*zj considers the effect of the section being singly-symmetric. The results were previously unconservative when the load was destabilizing and the beam was a deep beam.
An enhancement has been made to improve reporting for all concrete frame design codes for columns in which the reported design axial forces and bending moments were reported apparently randomly instead of the maximum values of a multi-valued combination, especially when the required rebar was the minimum. This also happened when a combination for which the case of minimum eccentricity moment about one of the axes was to be reported. Now the program reports the worst set of forces even if the rebar is not affected. This was not a bug. No design results are affected.
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No limits to creativity
My body may be broken , but my spirit still fights for freedom
My body may be broken , but my spirit still fights for freedom