Product Information

Deep Beam - Direct Modeling(1)

Deep Beam Design – Direct Modeling(1)

Deep Beam – Design Specification

http://astruttie.aroad.co.kr/help/Tutorial1/AStrutTie-Tutorial-DeepBeam.html

Let’s look at how to input and use the AStrutTie program through the design of deep beam using strut-tie model.

  • Thickness : 0.800m
  • fck : 24MPa
  • fy : 300MPa
  • Unit : kN.m
  • Code : ACI 318-14

Creating Element

  • Click [New]
  • Set ACI 318-14
  • Click [Add STM Element]
  • Input coordinates (0, 0) and enter key. Move is possible with Tab key
  • Input coordinates (0, 1.400) and enter key
  • Select on the bottom node (1) of the created member
  • Click [F8] key , Ortho On
  • Move the mouse horizontally and click any point
  • [Distance] input 2.5m and enter key.
  • Select the created horizontal member by dragging
  • [Ctrl + C], copy of element
  • [Ctrl + V], paste of element
  • Click on the upper node (2) of the vertical member as the reference point of the copied member
  • Drag the top horizontal member that was copied
  • Select upper element
  • Click [Divide]
  • Choose [Relative distance]
  • 1st, input 0.7
  • [OK]
  • Select all members created by dragging
  • Click [Mirror Node or Element]
  • Click on the upper right side joint and the lower right side joint of the member to specify the baseline
  • [Select Mirror Type] dialog – choose [Copy]

Load Define and Loading

  • 1. Load Define
  • [Defind – Static Load]
  • Load Name : Dead, Description : Description
  • Click [OK]
  • 2. Loading
  • Select two of the top of the absence by dragging
  • Click [Assign – Static Load]
  • Right-click on the left side of the load starting point
  • After clicking Static Load, the Element Static Loads (Dialog) appears by clicking the right button of mouse
  • when the color of node changes from green to red. And then, loads are assigned by clicking Add button.
  • Click [Add]
  • Choose [Relative]
  • 1 Distance:0.0, Load:-1000
    2 Distance:1.0, Load:-1000
    3, 4 Distance:0, Load:0
  • [OK]
  • Click [Defind – Load Combinations]
  • Click [Add]
  • LC01 : Dead=1.0, LC02 : Dead=1.3
  • Click on the load in the Work Tree and check it on the screen.
  • [save] – DeepBeam-1.stm

Make Structure and Area

  • 1. Make Structure
  • Select all members created by dragging
  • Design – [Create Outer Boundary] click
  • 2. Make Area
  • Select all members created by dragging
  • Design – [Create Area] click
  • Click [Defind – Area Properties]
  • Thickness=0.800m
  • Compressive Strength of Concrete (fck)=24MPa,
  • Elastic Modulus of Concrete (Ec)=27,849MPa
  • Click [Defind – General Properties]-Steel Tab
  • Yield Strength (fy)=300MPa,
  • Elastic Modulus (Es)=200,000MPa

Modeling Mode

  • Modeling Mode change
  • Click [Beginning Mode] → Modeling Mode

ESO

  • Select [ESO] - The function is activated only in Professional Version.
  • On Work tree, Load Combination : LC01 select to see load and modeling
  • Select [LC02]
  • On Work tree, Load Combination : LC02 select to see load and modeling
  • Click [Project Information]
  • Mesh size for ESO (m) : 0.1
  • Click [View Options]
  • Node – On, Node name – Off
  • Select 5 nodes on the bottom left
  • Click [Assign Restraints]
  • Set roller
  • Select 5 nodes on the bottom right
  • Click [Assign Restraints]
  • Set roller
  • Select the leftmost joint of the lower part
  • Click [Assign Restraints]
  • Set hinge
  • Click [View Options]
  • Node – Off
  • Click [Analysis, Print Options]
  • Elimination Ratio for ESO : 0.01 → [OK]
  • Choose LoadCase : LC01 – 1
  • Click [Run Model Analysis] – 2
  • View ESO analysis result – 3

Stress Flow

  • Tip : The work flow is almost the same as ESO, please refer to ESO.
  • Select [Stress Flow]
  • On Work tree, Load Combination : LC01 select to see load and modeling
  • Select [LC02]
  • On Work tree, Load Combination : LC02 select to see load and modeling
  • Project Information – Mesh size for Stress Flow (m) : 0.2
  • VIEW – View Options Click
  • Node – On
  • Node name – Off
  • Select 3 nodes on the bottom left
  • [Assign Restraints]
  • Set roller
  • Select 3 nodes on the bottom right
  • [Assign Restraints]
  • Set roller
  • Select the leftmost joint of the lower part
  • [Assign Restraints]
  • Set hinge
  • [Run Model Analysis]
  • http://astruttie.aroad.co.kr/help/Tutorial1/AStrutTie-Tutorial-DeepBeam.html