What is capacity ratio in ETABS?
D stands for ‘demand’ and C stands for ‘capacity’, therefore the D/C ratio is a measure of the demand on a member against its capacity. For example, if a member can support a maximum load of 100 kN (capacity) and the load it is subjected to is 80 kN (demand) the D/C ratio would be 80/100 = 0.8 .
How do you calculate DC ratio in ETABS?
Etabs will calculate Qud and Qcd, to get DCR ratios, go to design, concrete frame design, display design info and 6/5 ….
What is PMM ratio?
The demand/capacity ratio (D/C) PMM ratio is the sum of the axial force demand/capacity ratio and the bending moment demand/capacity ratio. A PMM value greater than one will be used here to indicate overstressed members. PMM Ratio = PRatio + MMajRatio ≤ 1. (3.1) 4.
What is Mu2 and Mu3 in Etabs?
Design Mu2 and Mu3 are factored moments which result from the higher of governing load combinations or Mumin. Capacity moment (maximum probable moment) is for columns defined as special seismic.
What is BCC in Etabs?
EDIT: ETABS indicate BCC failure (beam column capacity ratio and can be fixed by changing beam section for a weaker beam or a column by a stronger column.
How do you calculate effective seismic weight?
The seismic load is calculated by taking the Total Seismic Weight and converting it into a horizontal direction by multiplying by the seismic response coefficient Cs. The program will apply a Diaphragm Surface load which represents the seismic contribution of the Slab weight and any additional Dyn Load.
What is the demand to capacity ratio?
The GSA guidelines Adviced the use of the Demand–Capacity Ratio (DCR) which is defined as the ratio of the structural member force after the sudden removal of a column to the member strength (capacity) ,as a benchmark to determine the failure of major structural members by the linear static analysis procedure (GSA 2003 …
What is interaction ratio in column design?
Simply put, an interaction diagram (or curve) displays the combinations of the acceptable moment and axial capacities of a structural member. The equivalency between an eccentrically applied load and an axial load–moment combination is shown below.
How do I assign an isolated footing in Etabs?
Soil profiles and isolated column footing
- Define > Spring properties > Soil profiles.. > Add New Soil Profile.
- Define > Spring properties > Isolated Column Footing.
- Define > Spring properties > Point Springs and choose the radio button based on soil profile and footing dimensions.