User manual RISA TECHNOLOGIES CONNECTION REFERENCE GUIDE V1.0

[. . . ] RISAConnection Rapid Interactive Structural Analysis for Connections Version 1. 0 - General Reference 26632 Towne Centre Drive, Suite 210 Foothill Ranch, California 92610 (949) 951-5815 (949) 951-5848 (FAX) www. risatech. com Copyright 2010 by RISA Technologies, LLC All rights reserved. No portion of the contents of this publication may be reproduced or transmitted in any means without the express written permission of RISA Technologies, LLC. We have done our best to insure that the material found in this publication is both useful and accurate. However, please be aware that errors may exist in this publication, and that RISA Technologies, LLC makes no guarantees concerning accuracy of the information found here or in the use to which it may be put. Table of Contents Table of Contents Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] See AISC 13th Edition Manual, Page 10-9. End-Plate Shear Connection A warning is given if plate thickness exceeds 5/8". See AISC 13th Edition Manual, Page 10-49 Shear Tab (Single-Plate) Connection Weld strength and bolt shear strength are compared against the following limit states. If none of these limit states exceed both the weld strength and the bolt shear strength then a warning is given: General Reference Manual 23 Stability and Geometry Checks 1. Plate yielding due to bending Bolt bearing Bolt slip For reference see AISC 13th Edition Manual, Page 9-13 Single Angle Shear Connection No rotational ductility checks are done for single angle connections. Bolt Geometry Restrictions In these checks the program will check bolt spacing and edge distances against code prescribed minimums and maximums. These are checked for each element that is bolted in the program. Thus, this check will be given for each bolted element in a connection. When we do these checks we do them for both the member and the connector. We will check the worst case between the member and the connector. Check Minimum Bolt Spacing Section J3. 3 of the AISC 360-05 specification gives a minimum spacing of 2 2/3*d. Thus, we will check both vertical and horizontal spacing of bolts against this minimum. Check Maximum Bolt Spacing Section J3. 5 of the AISC 360-05 specification gives a maximum spacing requirement for bolts. The program considers the members in the connection NOT subject to corrosion, thus uses a maximum distance of 24*thickness of thinner plate or 12 inches. J3. 5(b) is not considered within the program. Check Minimum Edge Distance Section J3. 4 of the AISC 360-05 specification gives minimum edge distance requirements. This provision considers both Table J3. 4 and J3. 5, depending on the type of hole. Thus, the program combines the values from both Table J3. 4 and J3. 5 for checking minimum edge distance. 24 RISAConnection v1. 0 Stability and Geometry Checks Regarding sheared edges versus rolled edges, the program makes this assumption: All plate elements (shear tabs, end plates, flange plates, etc. ) assume minimum edge distances based on sheared edges. All wide flanges and angles (and any other rolled shapes) assume minimum edge distances based on rolled or thermally cut edges. Note that this check will only give detailed information if the minimum edge distance requirement was not met. Check Maximum Edge Distance Section J3. 5 of the AISC 360-05 specification gives a maximum edge distance of 12*thickness of connected part not to exceed 6 inches. Note that this check will only give detailed information if the maximum edge distance requirement was not met. Limitation The program does not do any checks for Entering and Tightening Clearances per Tables 7-16 and 7-17 of the AISC 13th edition manual. Thus, you will have to verify these dimensions manually. General Reference Manual 25 Bolt & Material Design Checks Bolt & Material Checks These bolt and material check are common to many different connection types. Bolt Group Eccentricity When bolt groups are subjected to shear loads that are eccentric to the centroid of the bolt group, then bolt group eccentricity is introduced. To account for this eccentricity, the AISC 13th Edtion Manual provides two different methods: he Instantaneous Center of Rotation method (IC method) and the Elastic Method. These are given as options in Global Parameters - Solution tab. Information on these methods are found on pages 7-6 through 7-9 in the 13th edition manual and most steel design textbooks. The IC method is used to compute the values in Tables 7-7 through 7-14, thus program values can be compared to these tables. Note: The Ex value given is the horizontal distance from the face of the supporting member to the centroid of the bolt group. Once this coefficient is computed it is used in the Bolt Shear Strength check. Generally the Elastic method is more conservative than the IC method. The Ey and Ang outputs are currently not used in the program. 26 RISAConnection v1. 0 Bolt & Material Design Checks The shear tabs for moment connections do not consider any eccentricities, thus this section will not be included in these connections. [. . . ] We want our users to be able to reach us when they are having difficulties with the program. However, this service is not to be used as a way to avoid learning the program or learning how to perform structural modeling in general. Hours: 6AM to 5PM Pacific Standard Time, Monday through Friday Before contacting technical support, you should typically do the following: 1. Please search the Help File or General Reference Manual. [. . . ]