Stages beyond CS2 are not analyzed.Ĥ1 Construction Stage Analysis Control 2. If the final stage is defined as: CS2, then the analysis stop at CS2. Final Stage Final Stage for the analysis can be selected. Thus the under the CS: Dead Load the effect of temperature load can be seen.Ĥ0 1. We will define a dummy construction stage rite after CS5 (30*5 = 150 days ) and activate the temperature load in that stage. Suppose, at the end of a 150 days of construction having each construction stage of 30 days, temperature stresses are desired. Dummy Stage For Obtaining Results A Dummy stage having no elements or boundaries activated can be used to get the effect due to a specific load. PSC Bridge Wizard Effective Width Scale Factorģ9 10. Manually By Model -> Boundaries -> Effective Width Scale Factor Effective Width scale factors can be assigned to a boundary group and activated at will. Automatically By using the PSC Bridge Wizard 2. Effective width can be defined in two ways: 1.
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Effective width scale factor is considered only in determining stresses as against stiffness scale factor which is used for generating stiffness matrix. Effective Width Scale Factor Effective width scale factor can be defined to take into account the effective flange width for the calculation of sectional stresses. Element Activation/Deactivation CS 8 : Activating the wet concrete and scaffolding weight on day 7 CS 9 : Activating the Elementģ8 9. Self Weight must be activated at day 1 of the 1 st constructions stage Scaffolding Scaffolding CS 8 Elements casted on day 7 CS 9ġ5 1. The self weight function will now automatically consider the weight of the element. When the scaffolding is removed, nodal load defined in 1 must be deactivated and element must be activated. Elements Load must be activated in the construction stage in which it is casted by nodal loads or moments if needed.
#USE TIME LOADS FOR CONSTRUCTION STAGE IN MIDAS CIVIL HOW TO#
Element Activation/Deactivation How to Model an Element which has been casted but the scaffolding will be removed in the next stage 1. Element Activation/Deactivation Define age of the element at the time of activation, used in determining the time dependent material properties Define the percentage of the forces resisted by the element to be deactivated that needs to be distributed to other elements Casting of Deck Scaffolding Removed CS 1 CS 2 CS 3 Age = 21 daysġ4 1. Element Activation/Deactivation Elements 17 and 25 have to be activated in CS3 Drag and Drop Step 1: Elements Modeled Step 2: Assign Structural Groups to Elements Step 3: Structure Group Activated in CS3ġ3 1. Tendon group is not used to activate or deactivate a tendon, it is just used to see the results of a certain number of tendons together.ġ2 1. Importance of Defining Groups Groups Structure Boundary Load Groups are important because: Only the structure groups, load groups or boundary groups can be activated or deactivated in the construction stages, element number or load case name cannot be used to deactivate. Introduction Construction Stage DefinitionĦ 1.
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Introduction Flow Chart of Construction Stage Analysis: Modeling of Structure Defining Structure Groups Defining Loads under Load Group Defining Boundary under Boundary Groups Generation of Construction Stages Defining Construction Stage Data Construction Stage Analysis Controlĥ Construction Stage Analysis 1. Introduction Need of Construction Stage Analysis: Construction Sequence may lead to critical force effects which may lead to shear or flexural failure Long Unsupported cantilever sections may induce forces which may be substantially different from those in completed structure: Time Dependent material properties also play a major role in segmental bridge construction Negative Moments Construction Stage Final Bridge Profile Continuous Structure Lesser Negative Moments at Mid SupportsĤ Construction Stage Analysis 1.
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1 Advanced Webinar Date: February 23 rd, 2012 Topic: Construction Stage Analysis Presenter: HyeYeon LeeĢ Contents: Introduction Modeling Features Construction Stage Analysis Control Results 2ģ Construction Stage Analysis 1.