CSA A23.3-04 PDF

Initiation of the design process, along with control of various design parameters, is accomplished using the Design menu. This manual addresses the second design process. Automated design at the object level is available for any one of a number of user-selected design codes, as long as the structures have first been modeled and analyzed by the program. Model and analysis data, such as material properties and member forces, are recovered directly from the model database, and no additional user input is required if the design defaults are acceptable. The design is based on a set of user-specified loading combinations.

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Initiation of the design process, along with control of various design parameters, is accomplished using the Design menu. This manual addresses the second design process. Automated design at the object level is available for any one of a number of user-selected design codes, as long as the structures have first been modeled and analyzed by the program. Model and analysis data, such as material properties and member forces, are recovered directly from the model database, and no additional user input is required if the design defaults are acceptable.

The design is based on a set of user-specified loading combinations. However, the program provides default load combinations for each design code supported in the program.

If the default load combinations are acceptable, no definition of additional load combinations is required. In the design of columns, the program calculates the required longitudinal and shear reinforcement. The column capacity ratio gives an indication of the stress condition with respect to the capacity of the column.

The biaxial column capacity check is based on the generation of consistent three-dimensional interaction surfaces. It does not use any empirical formula- tions that extrapolate uniaxial interaction curves to approximate biaxial action. Interaction surfaces are generated for user-specified column reinforcing con- figurations. The column configurations may be rectangular, square or circular, with similar reinforcing patterns. The calculation of moment magnification factors, unsupported lengths and strength reduction factors is automated in the algorithm.

Every beam member is designed for flexure and shear at output stations along the beam span. All beam-column joints are investigated for existing shear conditions. For Ductile and Moderately Ductile moment resisting frames, the shear design of the columns, beams and joints is based on the probable moment capacities of the members. Output data can be presented graphically on the model, in tables for both input and output data, or on the calculation sheet prepared for each member.

For each presentation method, the output is in a format that allows the engineer to quickly study the stress conditions that exist in the structure and, in the event the member reinforcing is not adequate, aids the engineer in taking appropriate remedial measures, including altering the design member without rerunning the entire analysis.

Chapter 3 provides detailed descriptions of the code-specific process used for CSA 1 - 2.

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Tygozil Canadian Standards Association Comment on draft standards. If deflection is computed, account shall be taken of curvatures resulting from differential shrinkage of precast and cast-in-place components and of axial creep effects in a prestressed concrete member. The beneficial effects of confinement can be accounted for if substantiated by test results. This limit may be exceeded if adequate measures are taken to prevent damage to supported or attached elements. Elastic analysis — an analysis of deformations and internal forces based on equilibrium, compatibility of strains, and assumed elastic behaviour. Confinement ties — ties that meet the requirements of Clauses Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA to have such copies, and only if this Legal Csx appears on each such copy. Provisions for determining member stiffnesses have been added.

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