Suspension Bridge

Owned by 이혜연 (Unlicensed)
Last updated: Jul 12, 2022
7 min read

Summary

Create an Assembly Unit for the Suspension Bridge using the library in the program.

 

How to Run

[Base Mode]

  • Ribbon Menu > [Base] Tab > [Library] Group > Template

    • Suspension Bridge

 

Explanation

General Tab

  • [General Information]

    • Template Name : Enter the name of the Assembly Unit to be created.

    • Run Modify Mode after Creation : If turned on, the Assembly Unit Mode automatically runs when the user creates the template after entering all the settings so that the created template model can be modified.

 

 

Layout Tab

 

Enter the span configuration and the cable placement of the bridge.

  • [Bridge Information]

    • Span Configuration : Enter the span length (span at start point/middle span/span at end point) of the Assembly Unit to be created. (Enter either 1 span or 3 spans (Ex. 1 span = 300; 3 spans = 125,300,125))

    • Pylon Type : Select the pylon type.

    • Anchor Type : Select the anchor type of the cable.

    • Cable Type : Select the number of faces of the main cable.

The current Pylon Type creates the H-type pylon regardless of selection. Use a separate library if necessary.

  • [Guide]
    Shows the variable information that defines the span configuration.

  • [Configuration]

    • Cable Length

      • Lsc : Enter the horizontal length of the cable from the cable start point to Pylon 1(left pylon).

      • Lec : Enter the horizontal length of the cable from the cable start point to Pylon 2(right pylon).

    • Anchorage Elevation

      • Hsc : Enter the anchorage elevation of the cable start point relative to the design level.

      • Hec : Enter the anchorage elevation of the cable end point relative to the design level.

    • Cable Sag

      • SL : Enter the amount of sag of the beginning span main cable.

      • SC : Enter the amount of sag of the middle span main cable.

      • SR : Enter the amount of sag of the end span main cable.

    • Hanger Anchor. Spacing

      • W : Enter the spacing of the girder hanger anchor in the perpendicular direction.

    • Cable Spacing

      • Ws (at Start) : Enter the cable spacing from the cable start point in the perpendicular direction.

      • We (at End) : Enter the cable spacing from the cable end point in the perpendicular direction.

      • Wp1 (at Pylon 1) : Enter the cable spacing from pylon 1 in the perpendicular direction.

      • Wp2 (at Pylon 2) : Enter the cable spacing from pylon 2 in the perpendicular direction.

      • Wm (at Span Center) : Enter the spacing from the span center in the perpendicular direction.

For a three-dimensional main cable that has variable cable spacing, Wm is automatically adjusted to be set on the plane that connects Wp1, Wp2, W, regardless of the entered value.

    • Cable Height at IP

      • H1 : Enter the cable height at IP from the design level of pylon 1.

      • H2 : Enter the cable height at IP from the design level of pylon 2.

    • Distance from Deck to Pylon : Enter the location of the reinforcement girder transverse cross section.

      • G11 : Enter the transverse cross section distance from center of pylon 1 towards the start point.

      • G12 : Enter the transverse cross section distance from center of pylon 1 towards the end point.

      • G21 : Enter the transverse cross section distance from center of pylon 2 towards the start point.

      • G22 : Enter the transverse cross section distance from center of pylon 2 towards the end point.

    • Hanger Distance

      • Left : Enter the interval distance of the hangar cable for spans on the left (start).

      • Center : Enter the interval distance of the hanger cabler in the middle span.

      • Right : Enter the interval distance of the hangar cable for spans on the right (end).

    • Hanger Vertical Location

      • Hv : Enter the hanger cable’s vertical location based on the design level.

    • Expansion

      • Start : Enter the length of the expansion joint at the start point.

      • End : Enter the length of the expansion joint at the end point.

 

 

 

Cable Tab

Main Cable

 

Concept Diagram

 

  • PY1 / PY2 Saddle

    • R1 : Enter the curvature radius of the tower saddle IP great circle.

    • R2 : Enter the curvature radius of the tower saddle IP small circle.

    • βs : Enter the angle (degree) between the side span C’ to point of contact (C).

    • βm : Enter the angle (degree) between the middle span E’ to point of contact (E).

 

  • θs : Incident angle of the side span cable

  • θm : Incident angle of the middle span cable

  • x-coordinates of point O = (O_m x-coordinate)+(R1-R2)×sin(Φm)

  • y-coordinates of point O = (O_m y-coordinate)+(R1-R2)×cos(Φm)

  • α = tan-1 (xo - xD' / yo-yD' )

  • x-coordinates of point C = (O_S x-coordinate) - R1×sin(Φs+βs )

  • y-coordinates of point C = (O_S y-coordinate) - R1×cos(Φs+βs )

  • x-coordinates of point E = (O_m x-coordinate) - R1×sin(Φm+βm )

  • y-coordinates of point E = (O_m y-coordinate) - R1×cos(Φm+βm )

  • x-coordinates of point D′ = 0.0 / (y-coordinates of point D′) = (R22 - xO 2)0.5 +y02

 

Cable Property

  • [Main Cable]

    • Diameter : Enter the diameter of the main cable.

  • [Hanger Rope]

    • Tie-down

      • Diameter : Enter the diameter of the tie-down hanger rope.

      • Rope Number : Select the number of hangers for multi-ropes. The template supports upto 3 hanger ropes.

    • General

      • Diameter : Enter the diameter of the general hanger rope.

      • Rope Number : Select the number of hangers for multi-ropes. The template supports upto 3 hanger ropes.

  • [Hanger Rope Connection Type]
    Enter the type of hanger rope connection (Top=Main Cable, Bottom=Girder).

  • [Hanger Rope Details]

    • A for Side Span : Enter the offset distance of the hanger rope attachment point from the center of the side span main cable.

    • A for Central Span : Enter the offset distance of the hanger rope attachment point from the center of the middle span main cable.

    • B (Hanger Spacing) : Enter the spacing between hangers in the multi hanger rope.

 

 

Model Tab

Deck Slab

  • Deck Width : Enter the deck width.

  • Pave. Thickness : Enter the road pavement thickness.

  • Spacing

    • Spacing(L1) : Enter the width of the left railing of the bridge traverse cross section.

    • Spacing(L2) : The width of the left side road of the bridge traverse cross section is automatically input.

    • Spacing(L3) : Enter the median strip width.

    • Spacing(L4) : The width of the right side road to the cross section of the bridge is automatically input.

    • Spacing(L5) : Enter the width of the right railing of the bridge traverse cross section. Type

  • Type

    • Type(L1) : Structure type to be placed at Spacing(L1).

    • Type(L2) : Structure type to be placed at Spacing(L2).

    • Type(L3) : Structure type to be placed at Spacing(L3).

    • Type(L4) : Structure type to be placed at Spacing(L4).

    • Type(L5) : Structure type to be placed at Spacing(L5).

 

Section

  • H : Enter the height of the stiffening girder.

 

Bearing Setting

  • b1 : Enter the distance between the center of cross-section and the bearing center.

  • b2 : Enter the distance between the bearing center and the girder end in the bridge direction.

  • h1 : Enter the height of the standalone bearing.

  • h2 : Enter the total height of the bearing including the mortar.

 

Sub Structure

  • Strat Support : Select the start support of the Assembly Unit to create.

  • End Support : Select the end support of the Assembly Unit to create.

  • Create Bearing : If turned on, the Assembly Unit is created including the bearing.

 

 

Library Tab

 

 

 

 

Reference Materials