1、 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.ISBN: 978-1-56051-495-4 Pub Code: GVCB-2-I1 American Association of State Highway and Transportation Officials 444 North Capitol Street, NW Suite 249 Wash
2、ington, DC 20001 202-624-5800 phone/202-624-5806 fax www.transportation.org 2010 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law. 2010 by the American Association of State Highway and Transportation Official
3、s.All rights reserved. Duplication is a violation of applicable law.2010 INTERIM EDITION TO THE GUIDE SPECIFICATIONS AND INSTRUCTIONS AND INFORMATION COMMENTARY FOR VESSEL COLLISION DESIGN OF HIGHWAY BRIDGES iiiINSTRUCTIONS AND INFORMATION General AASHTO has issued proposed interim revisions to Guid
4、e Specifications and Commentary for Vessel Collision Design of Highway Bridges, Second Edition (2009). This packet contains the revised pages. They are not designed to replace the corresponding pages in the book but rather to be kept with the book for fast reference. Affected Articles Underlined tex
5、t indicates revisions that were approved in 2010 by the AASHTO Highways Subcommittee on Bridges and Structures. Strikethrough text indicates any deletions that were likewise approved by the Subcommittee. A list of affected articles is included below. All interim pages are printed on blue paper to ma
6、ke the changes stand out when inserted in the second edition binder. They also have a page header displaying the section number affected and the interim publication year. Please note that these pages may also contain nontechnical (e.g. editorial) changes made by AASHTO publications staff; any change
7、s of this type will not be marked in any way so as not to distract the reader from the technical changes. Please note that in response to user concerns, page breaks are now being added within sections between noncontiguous articles. This change makes it an option to insert the changes closer to the
8、affected articles. Table i2010 Changed Articles SECTION 2: SYMBOLS AND DEFINITIONS SECTION 3: GENERAL PROVISIONS 3.7 3.12 C3.12 3.13 SECTION 4: DESIGN VESSEL SELECTION 4.5 4.8.3.4 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a vio
9、lation of applicable law. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.2010 INTERIM EDITION TO THE GUIDE SPECIFICATIONS AND SECTION 2 COMMENTARY FOR VESSEL COLLISION DESIGN OF HIGHWAY BRIDGES 1SECTION
10、 2: SYMBOLS AND DEFINITIONS Delete the following notation: BB= barge width as defined in Article 3.13 (ft) Modify the following notation: RB= ratio of barge width as defined in Equation 3.13-1; PA correction factor for bridge location as defined in Equations 4.8.3.2-1 and 4.8.3.2-2a through 4.8.3.2-
11、2c (dimensionless) 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of appli
12、cable law.2010 INTERIM EDITION TO THE GUIDE SPECIFICATIONS AND SECTION 3 COMMENTARY FOR VESSEL COLLISION DESIGN OF HIGHWAY BRIDGES 3SECTION 3: GENERAL PROVISIONS 3.7Design Impact Speed Figure 3.7-1Design Impact Speed Revise the following variable under Figure 3.7.1: VT= design impact speed transit s
13、peed in channel (ft/s) 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of a
14、pplicable law.2010 INTERIM EDITION TO THE GUIDE SPECIFICATIONS AND SECTION 3 COMMENTARY FOR VESSEL COLLISION DESIGN OF HIGHWAY BRIDGES 53.12BARGE COLLISION FORCE ON PIER Modify the following variables definitions under the where list: PB= equivalent static barge impact force (kips), and BB= barge wi
15、dth (ft), and C3.12 Add the following paragraph to the end of this Article: Since the barge collision load formulation is for a standard rake head log height of 2 to 3 ft., the possibility of deeper head logs that may occur in tanker barges and special deck barges should be considered. In lieu of be
16、tter information, the barge force may be increased in proportion to the head log height compared to that of the standard rake head log height. Revise and renumber Eq. C3.12.1-1a as follows: For aB 0.1 m, 60 , in MBBBPa (C3.12.11a) For aB 0.1 m, 60 , in MNBBPa (C3.12-1a) Revise and renumber Eq. C3.12
17、.1-1b as follows: For aB 0.1 m, 61.6 ,inMBBBPa (C3.12.1-1b) For aB 0.1 m, 61.6 ,inMNBBPa (C3.12-1b) Renumber Eq. C3.12.1-2a as Eq. C3.12-2a: (C3.12.1-2a) Renumber Eq. C3.12.1-2b as Eq. C3.12-2b: (C3.12.1-2b) 2010 by the American Association of State Highway and Transportation Officials.All rights re
18、served. Duplication is a violation of applicable law. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.2010 INTERIM EDITION TO THE GUIDE SPECIFICATIONS AND SECTION 3 COMMENTARY FOR VESSEL COLLISION DESIGN
19、 OF HIGHWAY BRIDGES 73.13BARGE BOW DAMAGE DEPTH Revise Eq. 3.13-1 as follows: 1/210.2= 1+ 1 5672BBKEaR(3.13-1) 1/2= 1+ 1 (10.2)5672BKEa(3.13-1) Modify the following variables definitions under the where list: aB= barge bow damage depth (ft), and KE = barge collision energy (kip-ft), and. RB= ratio o
20、f 35BBwhere BB= barge width (ft). 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a vio
21、lation of applicable law.2010 INTERIM EDITION TO THE GUIDE SPECIFICATIONS AND SECTION 4 COMMENTARY FOR VESSEL COLLISION DESIGN OF HIGHWAY BRIDGES 9SECTION 4: DESIGN VESSEL SELECTION 4.5Impact Distribution Revise paragraph 3 as follows: The LOA shall be based on the dimension of a vessel selected in
22、accordance with Method I criteria in Article 4.7.2. The LOA for impact distribution is the same dimension used in Article 3.7 for vessel impact speed and is a constant for Methods I, II, and III each vessel category in the design fleet. For barge tows, LOA shall be equal to the combined length of al
23、l barges in the tow plus the length of the tug/tow vessel as shown in Figure 3.5.1-2. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law. 2010 by the American Association of State Highway and Transportation
24、 Officials.All rights reserved. Duplication is a violation of applicable law.2010 INTERIM EDITION TO THE GUIDE SPECIFICATIONS AND SECTION 4 COMMENTARY FOR VESSEL COLLISION DESIGN OF HIGHWAY BRIDGES 114.8.3.4Probability of Collapse (PC) Revise Eq. 4.8.3.4-1b as follows: = 1 HPCP(4.8.3.4-1b) 1 (0.111)HPCP(4.8.3.4-1b) 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.
