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Analiz yapılırken önce şeritler yerleştirilir, şeritler genişlik parametrelerine göre yatay doğrultuda yerleştirilirler. Daha sonra araçlar marjin ve genişlik parametrelerini ihlal etmeden yatay ve dikey doğrultuda yerleştirilirler. Araçlar arasındaki mesafe Lane Type kısmında belirlenen Vehicle Spacing parametrelerinden az ve ya fazla olamaz. Bir Laneye maksimum Lane objesine tanımlanan taşıt sayısı kadar taşıt yükleme yapılır. Yol üzerindeki Şerit sayısı arttıkça taşıt yükleri Multiple Presence Factor parametresi ile azaltılabilir. Amaç bütün kombinasyonları deneyerek en kritik taşıt yükleme konumunu elde etmek. Bu şekilde tanımlanan nodeların kuvvetlerini, deplasmanlarını, oluşturulan yapının major, minor axis gibi moment bending diagramlarına erişilebilir.
Analiz Sonuçları
Analiz sonuçlarına Results kısmından ulaşılır. Bu bölümde Node Displacements (Local), Node Reactions (Local), Node Reactions (Global), Element End Forces (External-Local), Element End Forces (External-Global), Composite Element Forces (Sectional), FESurface Forces (Internal), FESurface Stresses ve Frequencies olmak üzere 9 adet analiz sonucu kısmı vardır. İstenilen analiz sonucuna gerekli bölüme gidilerek ulaşılır. 'Değerin' üstüne tıklanarak taşıt konumlarına ulaşılabilir.
PENNDoT Example at OpenBrIm
The 'representative' bridge is parametrically modelled in accordance with Figures 2.1(A), 2.1(B),2.1(C), 2.1(D) of the Commonwealth of Pennsylvania Department of Transportation's Software Evaluation for LRFD Refined Analysis of Girder Bridges - 2017. Parametric modelling refers to the relationships among all bridge components in a project that enable the coordination and change management that OpenBrIM Platform provides. These relationships are created in OpenBrIM Library by the engineers.
Vehicles Definition
| Name | HL93 Design Truck variable spacing | HL93 Design Truck without variable spacing | HL93 Design Tandem | HL93 Fatigue | HS25-44 Truck | Moment | Shear | Moment Pt. | Shear Pt. | PHL-93 Truck | PHL-93 Tandem | PHL-93 Design Truck no variable spacing | PHL-93 Tandem Pairs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Factor | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Gross Vehicle Weight(kip) | 72 | 72 | 50 | 72 | 90 | 22.5 | 32.5 | 22.5 | 32.5 | 72 | 62.5 | 72 | 100 |
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Design Lanes Definition
| Name | TruckPairLane | TruckAlone | 90%TruckPair90%Lane | LaneLoadNoImpact | TandemLane | TruckLane | TandemPairLane | TruckPairOnly | LaneOnly | TandemPairOnly | Definition |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lane Width(ft) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
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| Margin btw. Vehicle & Lane Edge(ft) | 2 | 1 | 2 | 1 | 1 | 1 | 2 | 2 | 1 | 2 | |
| Vehicle 1 | PHL93 Design Truck no variable spacing | PHL-93Truck | PHL93 Design Truck no variable spacing | NULL | PHL-93Tandem | PHL-93Truck | HL93_DesignTandem | PHL93 Design Truck no variable spacing | NULL | HL93_DesignTandem |
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| Vehicle 1 Impact Factor | 1.333 | 1.333 | 1.197 | 1.333 | 1.333 | 1.333 | 1.333 | 1.333 | - | 1.333 | |
Vehicle 2 | PHL93 Design Truck no variable spacing | NULL | PHL93 Design Truck no variable spacing | NULL | NULL | NULL | HL93_DesignTandem | PHL93 Design Truck no variable spacing | NULL | HL93_DesignTandem | |
| Vehicle 2 Impact Factor | 1.333 | - | 1.197 | - | - | - | 1.333 | 1.333 | - | 1.333 | |
| Vehicle 1 & 2 Direction | Both | Both | Both | Both | Both | Both | Both | Both | Both | Both | |
| Lane Load Magnitude(kip/ft) | 0.64 | 0 | 0.576 | 0.64 | 0.64 | 0.64 | 0.64 | 0 | 0.64 | 0 |
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| Lane Load Width(ft) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | |
| Min. Vehicle Spacing(ft) | 50 | 50 | 50 | 50 | 50 | 50 | 26 | 50 | 50 | 26 |
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| Max. Vehicle Spacing(ft) | 300 | 300 | 300 | 300 | 300 | 300 | 40 | 10000 | 10000 | 40 | |
| Adjacent Span Placement | YES | NO | YES | NO | NO | NO | YES | YES | NO | YES | |
| Apply Lane Constraint | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO |
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| Lane Constraint Start(ft) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Lane Constraint End(ft) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Roadways Definition
| Name | LIVELOADPATH | Specific Definition | Main Definition |
|---|---|---|---|
| Width Right Side(Start)(ft) | 15.5 | - |
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| Width Right Side(End)(ft) | 15.5 | - | |
| Width Left Side(Start)(ft) | 15.5 | - | |
| Width Left Side(End)(ft) | 15.5 | - | |
| Surface Group | LLFEGroup |
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Number of path points readonly | 2 |  | |
| Span Locations(ft) | [[960,0],[2160,0]] |
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Long.Placement Increment(ft) | 4 | - |
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| Trans. Placement Increment(ft) | 2 | - | |
| Unit Force X(kip) | 0 | - | |
| Unit Force Y(kip) | 0 | - | |
| Unit Force Z(kip) | -1 | - | |
| Unit Moment X(kip-ft) | 0 | - | |
| Unit Moment Y(kip-ft) | 0 | - | |
| Unit Moment Z(kip-ft) | 0 | - | |
| Centrifugal Fact. for Radial Force | [] | - |  |
| Centrifugal Fact. for Left Wheel | [] |  | |
| Result Tolerance | 0.005 | - |
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Live Load Cases Definition
| Name | TandemPlusLaneLC | TruckPlusLaneLC | TruckPairPlusLaneLC | TruckAloneLC | 90%TruckPairPlus90%LaneLC | LaneLoadLC | TandemPairLaneLC | TruckPairOnlyLC | LaneOnlyLC | TandemPairOnlyLC | Specific Definition | Definition |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Multiple Presence Factors(MPF) | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] | [1.2,1,0.85,0.65] |
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| Maximize for Stress Range(Fatigue) | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO | - | |
| Maximum # of Lanes | NO Limit | NO Limit | NO Limit | NO Limit | NO Limit | NO Limit | NO Limit | NO Limit | NO Limit | NO Limit | - | |
| Design Lane Option 1 | TandemLane | TruckLane | TruckPairLane | TruckAlone | 90%TruckPair90%Lane | LaneLoadNoImpact | TandemPairLane | TruckPairOnly | LaneOnly | TandemPairOnly | Only Deisgn Lane Option 1 is used |
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| Loading Surface 1 | LIVELOADPATH | LIVELOADPATH | LIVELOADPATH | LIVELOADPATH | LIVELOADPATH | LIVELOADPATH | LIVELOADPATH | LIVELOADPATH | LIVELOADPATH | LIVELOADPATH | Only Loading Surface 1 is used |
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| Structure Group | BridgeFEGroup | BridgeFEGroup | BridgeFEGroup | BridgeFEGroup | BridgeFEGroup | BridgeFEGroup | BridgeFEGroup | BridgeFEGroup | BridgeFEGroup | BridgeFEGroup |
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| Is Actıve | YES | YES | YES | YES | YES | YES | YES | YES | YES | YES | - |
