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1、INTERNATIONAL STANDARD IS0 8686-5 First edition 1992-08-15 Cranes - Design principles for loads and load combinations - Part 5 : Overhead travelling and portal bridge cranes Apparels de levage B charge suspendue - Principes de calcul des charges et des combinaisons de charge - Partie 5 : Ponts roula
2、nts et ponts portiques Reference number IS0 8686-5 : 1992 (El Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:04:40 MDTNo reproduction or networking permitted without license
3、from IHS -,-,- IS0 8585-5 : 1992 (E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body
4、interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrote
5、chnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vo
6、te. International Standard IS0 8686-5 was prepared by Technical Committee ISO/TC 96, Cranes, Sub-Committee SC 9, Bridge and gantry cranes. IS0 8686 consists of the following parts, under the general title Cranes - Designprin- ciples for loads and load combinations: - Part 1: General - Part 2: Mobile
7、 cranes - Part 4: Jib cranes - Part 5: Overhead travelling and portal bridge cranes The design principles for loads and load combinations of tower cranes will form the subject of IS0 8686-3. 0 IS0 1992 All rights reserved. No part of this publication may be reproduced or utilized in any form or by a
8、ny means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher International Organization for Standardization Case postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii Copyright International Organization for Standardizati
9、on Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:04:40 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 8585-5 : 1992 (El Cranes - Design principles for loads and load combinatio
10、ns - Part 5: Overhead travelling and portal bridge cranes 1 Scope This part of IS0 8686 establishes the application of IS0 8686-l to overhead travelling and portal bridge cranes as defined in IS0 4306-l) and gives specific values for the factors to be used. IS0 8306 : 1985, Cranes - Overhead travell
11、ing cranes andpor- tal bridge cranes - Tolerances for cranes and tracks. IS0 8686-l : 1989, Cranes - Design principles for loads and load combinations - Part 1: General. 3 Definitions 2 Normative references The following standards contain provisions which, through reference in this text, constitute
12、provisions of this part of IS0 8686. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 8686 are encouraged to investigate the possibility of applying the most recent editions of the standards indi
13、cated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 4302 : 1981, Cranes - Wind load assessment. IS0 4306-I : 1990, Cranes - Vocabulary - Part I: General. IS0 4310 : 1981, Cranes - Test code and procedures. For the purposes of this part of IS0 8686,
14、the definitions given in IS0 8686-l apply 4 Symbols The symbols used in this part of IS0 8686 are defined in IS0 8686-l. 5 Application of factors 5.1 The numerical values for different factors are given in table 1. Copyright International Organization for Standardization Provided by IHS under licens
15、e with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:04:40 MDTNo reproduction or networking permitted without license from IHS -,-,- Table 1 - Loads and load combinations 1 2 3 4 5 6 Load combinations A Load combinations E3 Load combinations C Categories Loads, f,
16、Partial Partial Partial of loads load Line Al A2 A3 A4 ,&;irs load factors 81 B2 83 84 B5 factors Cl C2 C3 C4 C5 C6 C7 C8 No. YP YP YP I Reslstance coefficient ym I,1 I,05 1 20 Coefficient for high-risk applications yn (see IS0 8686-l 1989, 7.3.61 21 Copyright International Organization for Standard
17、ization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:04:40 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6666-5 : 1992 (El 5.2 The I#I, factors for dynamic effects which are used for load combinati
18、ons shown in table 1 are given in table 2. Table 1 ine No. 1 2 3 on G- P2 P3 P4 6.1 1 6 1 2.2 6123 6.1.3.2 and annex D Q and 5 P5 6.1.4 and annex E 6 6.1.5 7 6.2.1.1 a 6.2.1 2 9 6213 10 6.2.2 11 12 13 14 16 16 17 ia $2 06 7 rp5 5 - 6.1.2.2.2 6 3.1 6.3 2 6 3.3 6.3 4 6.3.5 6.3.6 637 - Table 2 - d, fac
19、tors r. Zeference to IS0 686-l : 1989 Values for factors &, or values for loads, or ,elevant International Standards p, = 1 f a, a = 0,l IS0 8686-l : 1989, hoisting classes IS0 8686-l The value of 4shall be estimated as shown in IS0 8686-l : 1989, annex D, if there are steps or gaps be- tween the ra
20、ils When using rigid body kinetic models : $5 = 1,2 if the acceleration and braking forces are changed with stepless control systems without backlash s = I,5 in other control systems where the drive forces are acting on the crane practically free of backlash qjs = 2 where considerable backlash exist
21、s When a displacement remain: within the limiting value specified ir IS0 8306, its effect can br neglected in the stress analysis IS0 4302 Regional snow- and ice-load con ditions Ambient and localized temperatun variations IS0 8686-l : 1969, annex F, may bc used for guidance IS0 8686-l : 1989, hoist
22、ing classes IS0 4302 IS0 8686-l and IS0 4310 IS0 8686-l IS0 8686-l 05 = 2 5 = 2 IS0 8686-l 6 Hoisting classes Some examples for the selection of hoisting classes according to IS0 8686-l : 1989, 6.1.2.1, are given in table 3. Table 3 - Examples Type of crane Hoistin! class Manual cranes Power station
23、 cranes Erection cranes Workshop cranes Ship unloaders with lifting beams, hooks or Stockyard cranes spreaders Ship unloaders Stockyard cranes with grabs or magnets Ladle cranes Open-hearth furnace charging cranes Ingot charging cranes Soaking pit cranes Stripper cranes Forge cranes - Cl HC2/HC HC3
24、HC3/HC HC3/HC “C4 The examples given in table 3 represent typical applications, structural designs and hoist control systems. More flexible load bearing systems and more sophisticated speed control systems may allow the selection of a lower hoisting class than indicated in table 3. There may be case
25、s where a higher hoisting class is appropriate. 7 Combination of acceleration effects In the case of overhead travelling and portal bridge cranes, the load is moved by hoisting (H), travelling (Lt), traversing (Ct) and, possibly, by slewing (SI) mechanisms. (See figure I.) The acceleration effects o
26、f these mechanisms acting simultaneously on the crane depend on the control systems and service conditions of the crane and whether a load is hoisted from the ground or a suspended load is hoisted. Figure 1 3 3 4 :4 2 3 Copyright International Organization for Standardization Provided by IHS under l
27、icense with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:04:40 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8585-5 : 1882 (El Taking the above into account, the accelerations given in table 4 are assumed to be acting simultaneously
28、. The gross loads shall be multiplied within the individual load combinations by the following factors: - load combinations Al and Bl : Q2 - load combinations A2 and 82: & - load combinations A3 and B3: (1 +r#%xg - load combinations A4 and 84: G4 - load combination C3: G6 Drive forces can change sig
29、nificantly in a short time interval. Thus the accelerations shall be calculated a) for starting the movement, b) for braking the steady-state movement, and c) for braking the movement during the starting process, or d) for accelerating the movement during the braking pro- cess (positioning). Thus th
30、e calculated rigid body acceleration forces shall be multiplied by the factor G5 in accordance with IS0 8686-l : 1989, 6.1.4. When considering the positioning effects, only one such effect is combined with other movements. In load combination C6 or C7, only the dynamic effects of the “emergency cut-
31、out” or of the “failure of mechanism or com- ponents” shall be considered without other dynamic effects, assuming the case of starting during steady-state motion. Table 4 - Combination of acceleration effects Hoisting a grounded load Load combinations Al, Bl, Cl Power station cranes Erection cranes
32、Workshop cranes Ship unloaders Stockyard cranes Steel mill cranes Hoisting a suspended load Load combinations A2 to A4, B2 to B4, C3 Power station cranes Ship unloaders Erection cranes Stockyard cranes Workshop cranes Steel mill cranes 4 Copyright International Organization for Standardization Provi
33、ded by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:04:40 MDTNo reproduction or networking permitted without license from IHS -,-,- Is0 6666-5 : 1992 (El r UDC 621.674 : 624.642 Descriptors : lifting equipment, cranes (hoists), travelling cr
34、anes, portal bridge cranes, loads (forces), rules of calculation Price based on 4 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:04:40 MDTNo reproduction or networking permitted without license from IHS -,-,-