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In this case user must take the call for keeping the LY, LZ calculated by the Tool as it is or to change it to be more practical approach.ĬE Intelsys suggest breaking it to lengths between rigidly connected beams.įollowing modelling cases considered for applying sign conventions in Programming
#Staad pro license generator
This means, theoretically, the effective length shall be considered as full height irrespective of the moment connections with beams.Īs the STAAD Parameter Generator Tool works on the principle of variation in shear force diagram, it gives effective length as full height of 12 m. above this height each portion of the column between rigidly connected beams shall be considered as breaks.Īs per the shear force diagram, column height above 5.825 m acts as a cantilever for applied lateral loads.
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While working with LY & LZ for columns in a frame shown in figure below, as per our practice of defining LZ, up to the height of 5.825 m LZ shall be considered as 5.825m. Point to be noted for results produced by this tool for columns Program is so intelligent, that if a horizontal member is modelled with beta angle 90 degrees, means its flanges parallel to Y direction in STAAD it gives LY in vertical plain associated with DJ1 & DJ2 for vertical deflection. On similar principle, effective length of members in minor direction i.e. In the case of members 213 & 222 DJ1 will be 108 & DJ2 will be 110. Similar logic is applied to find out DJ1 & DJ2, Program gives DJ1 & DJ2 as the node numbers of the end members extreme nodes. It adds their length together to give LZ as 6 m. Program creates a string of member numbers 213 & 222 without breaking. So, for the beams 215 & 223 program do not give any LZ value because STAAD will take it as member length by default.Īt the node 109 connecting beams 213 & 222, the shear force for beam 213 for its end node is negative and at starting node of beam 222 is also negative. Now, program identifies this pattern of shear force change at each node along the beams and break its effective length at these nodes. Program identifies the local directions of the members depending on the node coordinates). (provided members are modelled in positive direction from left to right, if it is in reverse direction, sign convention changes. In STAAD, this convention is treated as shear force at end node of beam 215 as positive and shear force at starting node of beam 223 as also positive. Parameters will be generated withinįew minutes and to a high level of accuracy. User required to analyse the structure, fill few information in the Excel Tool and click on the Create Parameters button. Here is the tool developed by CE Intelsys to find out the effective lengths (LZ & LY) of the members based on their Bending Moment/Shear Force Diagram Pattern. What if we get such a tool, which can give the effective lengths of the members with accurate judgment? One can judge the effective length of the member with respect to change in slope of Bending Moment Diagram. On the Bending Moment/Shear Force Diagram. The correct method to define these lengths would be based The judgment of the person because he/she has to judge the lengths based on the geometry of the structure. And the definitions of these lengths may vary depending on To find out the effective length of each and every member in STAAD is a tough job and time consuming too. Other parameters such as UNL or UNT & UNB can be considered same as LY OR one can refer to the respective In its local Z axis of bending is defined as LZ and in Y axis of bending it is defined as LY. In strength design, we need to define the effective lengths of structural members with respect to their local bending axes as one of the parameters. One set is used for strength design of structures and another for serviceability design. Two types of parameters we need to define while designing steel structures. One of the major steps in design of steel structures in STAAD Pro is defining the Design Parameters.