tailieunhanh - Vessel Collision Design of Bridges

Vessel Collision Design of Bridges Introduction Background • Basic Concepts • Application 60 Initial Planning Selection of Bridge Site • Selection of Bridge Type, Configuration, and Layout • Horizontal and Vertical Clearance • Approach Spans • Protection Systems Waterway Characteristics Channel Layout and Geometry • Water Depth and Fluctuations • Current Speed and Direction Vessel Traffic Characteristics Physical and Operating Characteristics • Vessel Fleet Characteristics Collision Risk Analysis Risk Acceptance Criteria • Collision Risk Models Vessel Impact Loads Ship Impact • Barge Impact • Application of Impact Forces Michael Knott Moffatt & Nichol Engineers. | Knott M. Pruca Z. Vessel Collison Design of Bridges. Bridge Engineering Handbook. Ed. Wai-Fah Chen and Lian Duan Boca Raton CRC Press 2000 60 Vessel Collision Design of Bridges Introduction Background Basic Concepts Application Initial Planning Selection of Bridge Site Selection of Bridge Type Configuration and Layout Horizontal and Vertical Clearance Approach Spans Protection Systems Waterway Characteristics Channel Layout and Geometry Water Depth and Fluctuations Current Speed and Direction Vessel Traffic Characteristics Physical and Operating Characteristics Vessel Fleet Characteristics Collision Risk Analysis Risk Acceptance Criteria Collision Risk Models Vessel Impact Loads Ship Impact Barge Impact Application of Impact Forces Bridge Analysis and Design Michael Knott Bridge Protection Measures Moffatt Nichol Engineers Physical Protection Systems Aids to Navigation Zolan Prucz Alternatives Modjeski and Masters Inc. Conclusions Notations The following symbols are used in this chapter. The section number in parentheses after definition of a symbol refers to the section or figure number where the symbol first appears or is identified. AF annual frequency of bridge element collapse Section Bm beam width of vessel Figure Bp width of bridge pier Figure DWT size of vessel based on deadweight tonnage one tonne 2205 lbs kN Section H ultimate bridge element strength Section N number of one-way vessel passages through the bridge Section P vessel collision impact force Section PBh ship collision impact force for head-on collision between ship bow and a rigid object Section PDH ship collision impact force between ship deckhouse and a rigid superstructure Section 2000 by CRC Press LLC PMT ship collision impact force between ship mast and a rigid superstructure Section PS ship collision impact force for head-on collision between ship bow and a rigid object .