Bridging Your Innovations to Realities Curved Steel I-Girder Bridge Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 3 Overview 1. The bridge geometry is made. 1. Materials and sections are defined. 2. Geometry is made from scratch. 3. Crossbeam/ diaphragm modeling. 4. Boundary conditions are applied. 5. Loading is applied. (Self weight and SIDL) 2. Live Loads are applied as per AASHTO LRFD. 1. Two lanes is defined. 2. The lane can carry vehicles in both directions. 3. Analysis 1. Response Spectrum 2. Live load Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 4 1. Introduction 32 ft 30 ft 200 ft 6 ft 1.5 ft 8 in Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 5 1. Introduction • FEA Modeling of Steel Bridges 1. Beam Element (Composite Section) 2. Beam & Plate Elements 3. Plate Elements Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 6 2. Materials Properties> Material > Add Steel: 1. Select Steel under type of design. 2. Select ASTM09(S) under Steel Standard. 3. Select A709-50W type from DB. 4. Click Apply. Concrete: 5. Select Concrete under type of design. 6. Select ASTM(RC) under Concrete Standard. 7. Select C5000 (for pier and pier table). 8. Click Apply. Concrete for Crossbeam: 9. Select C5000 from DB, then Standard as None. 10. Enter Name as Crossbeams. 11. Set Weight density as Zero. 12. Click OK. 3 2 1 5 4 6 7 8 Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 7 3. Sections Properties > Section > Add > select DB/User tab 1. Select I-section 2. Select User 3. Plug in dimensions as provided 4. Click Change Offset 5. Select Center-Top 6. OK 7. OK 3 5 4 6 7 Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 8 Properties > Section > Add > DB/User Diaphragm: 1. Select BD/User tab. 2. Select ‘I-Section’, and ‘DB’ 3. Select AISC(US) under Steel Standard. 4. Enter name Diaphragm, as W16X45 from DB. 5. Change Offset to Center –Top. 6. Click Apply 1 3 2 6 5 Sections 4 Steel Composite Girder Ramp Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 9 Properties> Section > Add Bracing: 1. Select DB/User tab. 2. Select ‘Angle Section’, and ‘DB’. 3. Select AISC(US) under Steel Standard. 4. Enter name as Bracing, and L- 4X4X3/8 from DB. 5. Set Offset as Center-Center. 6. Click Apply. Pier : 7. Select DB/User tab. 8. Select ‘Solid Round’. 9. Select User. 10. Enter name as Pier. 11. Enter Diameter as 72 in. 12. Click Apply. Pier Cap Center: 13. Select ‘Solid Rectangle’. 14. Name as Pier Cap Center. 15. Enter H as 72” and B as 72”. 16. Set Offset as Center –Top. 17. Click OK. 1 3 8 2 5 6 4 9 10 12 7 11 3. Sections Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 10 Properties> Section Add Section Pier Cap: (P_L) 1. Select Tapered Section Tab. 2. Select Solid Rectangle section for the ends of Pier Cap. 3. Enter name as P_L for left end. 4. Enter values for i and j . 5. Apply y and z axis variation for linear. 6. Set Offset Center Top. 7. Click Apply Repeat above step s again for the other end of cap(P_R) (i and j end interchanged) Dummy Crossbeams: 1. Select DB/User tab. 2.Select Solid Rectangle 3. Enter name as Dummy Crossbeams. 4. Select User. 5. Enter the H as 8 “ and B as 60”. (Note: Thickness of beam = deck thickness) 6. Set Offset as Center-Bottom. 7. Click OK. 1 3 2 4 Define Tapered Section properties (For Pier Cap) 3. Sections 5 6 7 Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 11 Properties > Thickness 1. In-plane & Out-of-plane: 8 in 2. Check Plate offset 3. Value: 4 in 4. OK 1 3 2 4 3. Sections 5 6 7 [...]... 30 midas Civil Bridging Your Innovations to Realities 6 Boundary Conditions: Supports Model > Boundary> Supports 1 Select the support nodes 2 Select Support type 3 Click Apply Repeat for abutment nodes 2 Interior girder node 1 Exterior girder node 3 31 midas Civil Steel Composite Curved Bridge Bridging Your Innovations to Realities 7 Loads Load>Static Load Cases 1 Enter SW, SIDL as Dead Loads 32 midas. .. and select Inactive 10 Click on Select All and drag and drop the Crossbeam + Diaphragm structure group on Model View window to assign the diaphragms and crosbeams to the structure group 34 midas Civil Steel Composite Curved Bridge Bridging Your Innovations to Realities 7 Loads: Live Loads (Define Lane) 1 Load > Moving >Moving Load Code 1 Select AASHTO LRFD from the moving load code Load > Moving Load... Selection by: Picking 6 Select all exterior nodes in bottom one by one starting from left bottom corner 7 Apply 8 Repeat the process for Lane 2 Only change Eccentricity to -23 ft 5 7 6 35 midas Civil Steel Composite Curved Bridge Bridging Your Innovations to Realities 7 Loads: Live loads (Vehicles and Load cases) Load > Moving Load Analysis Data> Moving Load case 5 5 Enter a Load case name: MVL 3 6 Check... nodes selected > Click Apply 6 4 7 23 midas Civil Bridging Your Innovations to Realities 4 Modeling – Concrete Deck 6 7 24 midas Civil Bridging Your Innovations to Realities 4 Modeling - Pier 1 Activate All Switch to Top-View over pier cap (Box A) 2 Click Activate(F2) Select by Window Select member corresponding to end diaphragm and switch to Left-View A 1 2 25 midas Civil Bridging Your Innovations... girder node 1 Exterior girder node 3 31 midas Civil Steel Composite Curved Bridge Bridging Your Innovations to Realities 7 Loads Load>Static Load Cases 1 Enter SW, SIDL as Dead Loads 32 midas Civil Steel Composite Curved Bridge Bridging Your Innovations to Realities 7 Loads: Self Weight and SIDL Load>Self Weight 1 Load case name as SW and group name as default 5 1 2 Z = -1 3 Click Add SIDL: 4 Select the... 9 Click Add Left End 7 Right End 2 9 28 midas Civil Bridging Your Innovations to Realities 4 Modeling 1 Node/Element > Nodes>Translate Translate node a by (0,0,-72 in) 2 Using Select Single, select the translated node 3 Node/Element > Elements>Extrude Extrude Node into line element to create pier as shown in dialog box 3 1 Node a 1 2 Newly Translated node 29 midas Civil Bridging Your Innovations to... 2 (right side) by - 30º 1 2 13 midas Civil Bridging Your Innovations to Realities 4 Modeling 1 Node/Element > Elements > Create Line Elements on Curve Create Line Elements on Curve by using Arc by 3 Points methods Enter 40 for Number of Segments Click in field P1 and then click on nodes from left to right (like nodes 1, 2, 3) 2 Repeat for the other four girders 1 14 midas Civil Bridging Your Innovations... 15 midas Civil Bridging Your Innovations to Realities 4 Modeling 1 Create diaphragms for Abutment 1 Click in nodal connectivity field and click on nodes 7,1,4 2 Repeat step 1 for diaphragm over Pier Cap and Abutment 2 3 Repeat Step 1 for every 4th node (diaphragm at pier cap) on inner edge girder with section as Bracing as shown Diaphragm Sections Toggle off Hidden Over Pier cap Abut 1 Abut 2 16 midas. .. there.* 5 Repeat for all end-diaphragms (i.e at pier cap and abutment 2) 3 At bottom-right corner of midas CIVIL window * 2 signifies that nodes will be snapped automatically to divide the element into ½ It can be changed to 3,4,5,,,,, to divide element by snapping nodes at 1/3 , ¼,1/5 ,….of 18 element length midas Civil Bridging Your Innovations to Realities 4 Modeling - End Diaphragm 6 Boundary>Rigid.. .midas Civil Bridging Your Innovations to Realities 4 Modeling 1 Node/Element > Nodes > Create nodes Create nodes at (0,0,0) and copy once 2 Create node at (100,30,0) 3 Select all by clicking 1 and translate (Nodes>Translate) along Y axis to make the nodes for edge girders 3 2 4 12 midas Civil Bridging Your Innovations to Realities 4 Modeling . Bridging Your Innovations to Realities Curved Steel I-Girder Bridge Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas Civil 3 Overview 1. The bridge. Modeling of Steel Bridges 1. Beam Element (Composite Section) 2. Beam & Plate Elements 3. Plate Elements Bridging Your Innovations to Realities Bridging Your Innovations to Realities midas. midas Civil 6 2. Materials Properties> Material > Add Steel: 1. Select Steel under type of design. 2. Select ASTM09(S) under Steel Standard. 3. Select A709-50W type from DB. 4. Click