REHABILITATION OF MACHINERY AT PRETORIA AVENUE LIFT BRIDGE OTTAWA, CANADA
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1 REHABILITATION OF MACHINERY AT PRETORIA AVENUE LIFT BRIDGE OTTAWA, CANADA Ryan Kanagy, P.E. STAFFORD BANDLOW ENGINEERING, INC. HEAVY MOVABLE STRUCTURES 13 th BIENNIAL SYMPOSIUM
2 BRIDGE DETAILS Vertical Lift Bridge over Rideau Canal, Ottawa Originally Built in 1915 / Rehabilitated 1980s Approximately 13 Lift Height
3 OVERVIEW Review Recent Rehabilitation Stemming from 2004 Inspection Including: Inspection Findings Machinery Analysis Rehabilitation Efforts
4 MACHINERY INSPECTION Component Motors Condition Current at motors imbalance
5 MACHINERY INSPECTION Component Motors Condition Current at motors imbalance Reducers No issues
6 MACHINERY INSPECTION Component Motors Condition Current at motors imbalance Reducers No issues Open Gears Light corrosion Inadequate lube
7 MACHINERY INSPECTION Component Motors Condition Current at motors imbalance Reducers No issues Open Gears Shaft Bearings Light corrosion inadequate lube Fair condition
8 MACHINERY INSPECTION Component Motors Condition Current at motors imbalance Reducers No issues Open Gears Shaft Bearings Light corrosion inadequate lube Fair condition Couplings No issues
9 Component Brakes MACHINERY INSPECTION Condition Minimal torque No hand release No limit switches No cover Defunct manufacturer
10 Component Brakes Wire Ropes MACHINERY INSPECTION Condition Defunct manufacturer Minimal torque No hand release No limit switches No cover Minor corrosion
11 Component Brakes MACHINERY INSPECTION Condition Defunct manufacturer Minimal torque No hand release No limit switches No cover Wire Ropes Minor corrosion Guides Frozen rollers
12 Component Brakes MACHINERY INSPECTION Condition Defunct manufacturer Minimal torque No hand release No limit switches No cover Wire Ropes Minor corrosion Guides Frozen rollers Span Locks Inoperable
13 MACHINERY ANALYSIS REFERENCED CODES Section 13 of the Canadian Highway Bridge Design Code CAN/CSA-S6-00 AASHTO LRFD Movable Highway Bridge Design Specification First Edition 2000
14 MACHINERY ANALYSIS POWER REQUIREMENTS Determined per Section of the Canadian Highway Bridge Design Code Similar to AASHTO with Consideration of Wind Loads, Ice Loads, Friction, Imbalance, and Inertia 19.4 Total hp Required Total, 30 hp Provided Required Brakes Based on 10 second Stop Using Motor Brakes. Check Total Brakes to Hold Span Under Specified Wind and Ice. Required Motor Brake 16 lbft Each Motor Brake Required Combined Braking 26 lbft for Each End Existing Brake Settings 88 to 144 lbft Per Brake 7 to 11 Times Required Capacity
15 MACHINERY ANALYSIS GOVERNING LOADS Canadian Code and AASHTO 150% FLT of Motor Neither Code Clear on Handling of Synchro-tie Motor AASHTO Allows 50% Increase in Allowable for Braking Canadian Code Does not Clearly Define Evaluated for Total Braking with 150% of Allowables in Accordance with AASHTO
16 MACHINERY ANALYSIS - CAPACITY Component Calculated Load Allowable Load Percent Over Allowable
17 MACHINERY ANALYSIS - CAPACITY Component Calculated Load Allowable Load Percent Over Allowable Wire Ropes 20,455 lb 22,158 lb ---
18 MACHINERY ANALYSIS - CAPACITY Component Calculated Load Allowable Load Percent Over Allowable Wire Ropes 20,455 lb 22,158 lb --- Sheave Trunnions 44,968 psi 27,500 psi 64
19 MACHINERY ANALYSIS - CAPACITY Component Calculated Load Allowable Load Percent Over Allowable Wire Ropes 20,455 lb 22,158 lb --- Sheave Trunnions 44,968 psi 27,500 psi 64 Trunnion Shaft Bearings 14,869 hours 40,000 hours min. 169
20 MACHINERY ANALYSIS - CAPACITY Component Calculated Load Allowable Load Percent Over Allowable Wire Ropes 20,455 lb 22,158 lb --- Sheave Trunnions 44,968 psi 27,500 psi 64 Trunnion Shaft Bearings 14,869 hours 40,000 hours min. 169 Ring Gear 40,661 lb 19,448 lb 109
21 MACHINERY ANALYSIS - CAPACITY Component Calculated Load Allowable Load Percent Over Allowable Wire Ropes 20,455 lb 22,158 lb --- Sheave Trunnions 44,968 psi 27,500 psi 64 Trunnion Shaft Bearings 14,869 hours 40,000 hours min. 169 Ring Gear 40,661 lb 19,448 lb 109 Pinion Shaft 18,707 psi (shear) 10,500 psi (shear) 78
22 MACHINERY ANALYSIS - CAPACITY Component Calculated Load Allowable Load Percent Over Allowable Wire Ropes 20,455 lb 22,158 lb --- Sheave Trunnions 44,968 psi 27,500 psi 64 Trunnion Shaft Bearings 14,869 hours 40,000 hours min. 169 Ring Gear 40,661 lb 19,448 lb 109 Pinion Shaft 18,707 psi (shear) 10,500 psi (shear) 78 Primary Speed Reducer 88 ft-lb 77 ft-lb 14
23 MACHINERY ANALYSIS - CAPACITY Component Calculated Load Allowable Load Percent Over Allowable Wire Ropes 20,455 lb 22,158 lb --- Sheave Trunnions 44,968 psi 27,500 psi 64 Trunnion Shaft Bearings 14,869 hours 40,000 hours min. 169 Ring Gear 40,661 lb 19,448 lb 109 Pinion Shaft 18,707 psi (shear) 10,500 psi (shear) 78 Primary Speed Reducer 88 ft-lb 77 ft-lb 14 Secondary Speed Reducer 201,200 in-lb 148,537 in-lb 35
24 REHABILITATION SCOPE STAGE 1 Trunnion & Sheave Assembly Replacement
25 REHABILITATION SCOPE STAGE 1 Trunnion & sheave assembly replacement Counterweight rope replacement
26 ROPE TENSION MEASUREMENTS
27 ROPE TENSION MEASUREMENTS
28 STRAIN GAGE BALANCE MEASUREMENTS Trunnion & sheave assembly replacement Counterweight rope replacement Balance measurement and adjustment
29 REHABILITATION SCOPE STAGE 2 Span drive brakes Span guides Span locks Traffic gates
30 REHABILITATION SCOPE STAGE 2 Span drive brakes Span guides Span locks Traffic gates
31 REHABILITATION SCOPE STAGE 2 Span drive brakes Span guides Span locks Traffic gates
32 REHABILITATION SCOPE STAGE 2 Span drive brakes Span guides Span locks Traffic gates
33 REHABILITATION SCOPE STAGE 2 Span Drive Brakes Span Guides Span Locks Traffic gates
34 REHABILITATION OF MACHINERY AT PRETORIA AVENUE LIFT BRIDGE OTTAWA, CANADA Ryan Kanagy, P.E. STAFFORD BANDLOW ENGINEERING, INC. HEAVY MOVABLE STRUCTURES 13 th BIENNIAL SYMPOSIUM
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