Staad pro is a structural analysis & design software application originally developed by Research Engineers International in 1994. In late 2005, Research Engineers international was bought by Bentley systems. staad pro is a structural analysis design program software. It includes a state of art user interface, visualization tools & international design codes. It is used for 3D model generation, analysis & and multi-material design.
The staad pro supports several steel, concrete &Timber design codes. It is one of the software applications created to help structural engineers to automate their tasks and to remove the tedious & long procedures of the manual methods.
1) Checking of Input Data
After Preparation of Staad Pro building model, its data shall be checked thoroughly by various commands available in Staad Pro v8i software for its correctness.
2) Running of Analysis
It gives results for various load combination cases provided to it. To give results for various load combinations with the appropriate load factors as per IS 456-2000 and IS 1893-2002.Program Output Gives values of Axial force, Moment, Shear force and Deflections for each member like, column, beams, shear walls, plates.
3) Output results from the Program
The results obtained by Program should thoroughly checked before accepting the same in the final design.
a) The checking of input data is already discussed.
b) Checking of Displacements.
i) For fixed end of a Frame the value of displacement must be zero.
ii) The max horizontal displacement due to earth quake forces between successive floors shall not exceed 0.004 times the difference in levels between the floors.
iii) Displacement of all joints on a particular floor should be equal (Rigid Diaphragm).
iv) While checking of forces, at every joint. Following 3 equilibrium equations must be satisfied.
a) Sum of all vertical forces must be zero.
b) Sum of all horizontal forces must be zero.
c) Sum of all moments at the joint must be zero.
Note: Designer should personally check these points and check some joints for his own satisfaction.
4. Design of various RCC Elements of Building
After Analysis is over, thoroughly checked, the detailed design of various members of the building in the following order of Actual construction, to be in tune with construction program decided by the Project Managers at site.
i) Design of piles or pad footings, raft (Depending on the site and foundation condition).
ii) Design of columns.
iii) Design of beams (plinth level to term).
iv) Design of slabs (1st slab to Terrace).v) Design of Staircase,vi) Design of Water Tank, Lift Machine room, stair case head room