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{info} This page is devoted to *frequently asked questions* (FAQ) related to [auto lateral loads|kb:auto lateral load]. {info} \\ {on-this-page} h1. Modeling and application h2. How do I assign wind auto-lateral-load conditions? *AnswerANSWER:* Wind [auto lateral load|kb:Auto lateral load] may be assigned as follows: # Define the wind auto lateral load. \\ \\ # Assign wind-pressure coefficients using the Assign > Area Loads > Wind Pressure Coefficients option h2. Is it possible to display auto-lateral-load application? *Answer:* Yes, auto lateral load may be displayed. The seismic auto-lateral-load pattern applied to structural [joints|kb:Joint], for example, may be reviewed in tabular format under Model Definition > Load Pattern Definitions > Auto Seismic Loads > Table: Auto Seismic Loads to Joints. {hidden-content} *Answer:* Currently, it is not possible to display calculated wind pressures, though users may indirectly verify pressures by creating a test model. Assigning area-object exposure, for example, users may create a model with area objects located at different elevations and supported by lateral springs. Auto-lateral-load application of wind pressure on these area objects would yield spring displacements and reactions which correlate with applied pressure. {verify} {hidden-content} h2. How do I find the period used to calculate the auto-seismic load? *Answer:* All parameters, including structural period, are reported in the table available through Load Pattern Definitions > Auto Seismic Load. {hidden-content} *Related Incident:* * {incident:no=47806|comment=How to display the period used in calculating an auto-seismic load?} {hidden-content} h2. Is it possible to apply wind load to only a specific frame object? *AnswerANSWER:* Yes, wind load may be applied to specific [frame|kb:Frame] objects through the process which follows: # Define a [load pattern|Load pattern], designate the type as _Wind_, and specify the load as an _auto-lateral-load_ pattern, such as with ASCE 7-05. \\ \\ # Select Modify Lateral Load Pattern > Exposure from Frame and Area Objects > Include Frame Objects, and define _wind-direction angle_, along with other parameters. \\ \\ # Designate the frame objects for wind auto-lateral-load application through Assign > Frame Loads > Open Structure Wind Parameters. h2. How is wind load applied per BS standard? *Extended Question:* For modeling a {new-tab-link:http://en.wikipedia.org/wiki/Floating_Production_Storage_and_Offloading}Floating Production Storage and Offloading{new-tab-link} (FPSO) unit as a 3D frame system, how would I apply wind load per BS standard? The Wave Wind form is limited to API standard, and I'm concerned that diaphragm definition would affect analysis. *AnswerANSWER:* Two options are available, described as follows: * Define dummy diaphragms then assign each to a single point object. Each point object then becomes the location where wind load is applied. Tributary area is specified using the Wind Exposure Width Data form. * Alternatively, use dummy area objects to apply wind loads using exposure from area objects. This may be specified using the BS 6399-95 Wind Load Pattern menu. {hidden-content} *Diaphragm and area object exposure diagrams* *Question:* Would you please provide an example and diagrams showing how wind auto lateral load is applied given diaphragm and area object exposure? *AnswerANSWER:* {open-question} {hidden-content} h1. Display h2. Is it possible to display auto-lateral-load application? *ANSWER:* Yes, auto lateral load may be displayed. The seismic auto-lateral-load pattern applied to structural [joints|kb:Joint], for example, may be reviewed in tabular format under Model Definition > Load Pattern Definitions > Auto Seismic Loads > Table: Auto Seismic Loads to Joints. {hidden-content} *ANSWER:* Currently, it is not possible to display calculated wind pressures, though users may indirectly verify pressures by creating a test model. Assigning area-object exposure, for example, users may create a model with area objects located at different elevations and supported by lateral springs. Auto-lateral-load application of wind pressure on these area objects would yield spring displacements and reactions which correlate with applied pressure. {verify} {hidden-content} h1. Formulation h2. How do I find the period used to calculate the auto-seismic load? *ANSWER:* All parameters, including structural period, are reported in the table available through Load Pattern Definitions > Auto Seismic Load. {hidden-content} *Related Incident:* * {incident:no=47806|comment=How to display the period used in calculating an auto-seismic load?} {hidden-content} |
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