Design of portal frame buildings including crane runway beams and monorails pdf

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design of portal frame buildings including crane runway beams and monorails pdf

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Views 4 Downloads 0 File size KB. Monorails are used where the need to lift and move items can be confined to one direction. This chapter is intended to give guidance for the design of crane runway beams and the portal frames required to support overhead travelling cranes while monorails are treated in the following chapter.

Figure 8. The code is quite comprehensive and deals with forms of construction, loading and both local and global design issues. For fatigue assessment purposes, the code sets numerous structure classifications S1 to S9 which depend on the crane utilisation and the state-of-loading.

The utilisation classes are U0 to U9 and they depend on the maximum number of operating cycles. These categories depend on the load spectrum which is essentially a measure of what percentage of the loads lifted are at the capacity of the crane.

Fatigue analysis is not required for structure classifications S1, S2 and S3 and so fatigue is not otherwise addressed in the text of this book. The code [1] makes a further distinction between Light Duty and Heavy Duty runways. The distinction between Light and Heavy Duty runways allows the code to offer minor design concessions for Light Duty runways. These concessions are as follows: a Lateral loads can be assumed to be applied at the top flange and be resisted by the top flange alone Clause 5.

Because the concessions are relatively minor, the checks are still done in the design example despite the crane runway beams being classified as Light Duty runways. Reference [2] considers that portal columns with corbels are suitable to support Light Duty runways whereas lattice, stepped or separate columns are considered suitable for Heavy Duty runways or for cranes which are high above the floor [2].

Adopting separate columns has the design advantage of separating the functions of building and crane support [2]. To proceed with the design, the designer needs to establish the level of the top of the rail, the clearance above the top of the rail and the crane wheel base. These vary with the type of crane, and can be obtained from the manufacturer.

The working loads are also best obtained from the crane manufacturer who knows the self-weight of the crane, the wheel centres, the limits of hook travel across the span and the intricacies of the crane code AS The manufacturer can usually provide loads factored for dynamic effects and lateral loads calculated in accordance with the code.

There can be a significant difference in wheel loads and geometry between single and double girder cranes, so the designer should at least establish, at the preliminary design phase, the type of crane that is to be used.

Nevertheless, the design should be checked when the actual crane has been chosen. AS Because monosymmetric beams such as crane runway beams with loads applied above the top flange are not directly covered by AS , methods are proposed in this chapter to deal with such beams.

Tables giving member moment capacities of crane runway beams using these methods are presented in Appendix 8. It should be noted that AS Because this has now been superseded by the current dead load factor of 1. This procedure is presented from the viewpoint of the additional steps needed for the design of a portal frame building with an overhead travelling crane compared with those needed in Chapter 4 for a building without a crane.

Obtain the static and dynamically factored vertical and lateral wheel loads from the crane manufacturer or likely manufacturers. Design the crane runway beams for combined vertical and lateral loading using the design capacity tables in Appendix 8. Carry out other checks on the crane runway beam such as flange and web thickness checks, deflection checks, shear checks and bearing checks. Check whether fatigue analysis and detailing are required.

Determine the maximum crane load reactions on the corbel supporting the crane runway beam, and the coincident minimum crane load reactions on the opposite portal column. If the corbel is included as a member in the computer model, these vertical loads are applied directly to the corbel.

If the corbel is not modelled, the crane load needs to be applied to the column as a vertical load and a coincident moment at the level of the mid-height of the corbel.

Determine the coincident lateral loads on the portal frame due to oblique travel or lateral inertia. For the purposes of portal frame design, these loads are assumed to be applied to the portal column at the level of the top of the crane runway beam. Determine the load combinations. This book or any part thereof must not be reproduced in any form without the written permission of the Australian Steel Institute. Woolcock … [et al.

ISBN pbk. Includes bibliographical references and index. Industrial buildings — Design and construction. Building, Iron and steel — Design and construction. Woolcock, S. Australian Steel Institute.

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Design of Portal Frame Buildings by S.T.woolcock, S.kitipornchai, M.a.bradford 3rd Ed 1999

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Embed Size px x x x x The resistances of steel I-section monorail beams Fig. The bottom flange of a monorail provides a track for themovement of a trolley which carries a hoist. The monorail is sup-ported at intervals along the top flange, but is free along the bot-tom flange, except at the supported ends where vertical stiffenersmay be provided to limit the travel of the trolley and to restrainthe bottom flange, as shown in Fig. At these ends, the restraintsare usually effective in preventing lateral deflection u and twist ro-tation , as is generally assumed for the prediction of the lateralbuckling resistance [1], but these restraints may be far apart, andbuckling resistance based solely on them may be very low. On theother hand, buckling resistance is increased by the loadwhich gen-erally acts below the bottom flange [2,3] and induces restrainingtorques, but it is not common to take advantage of this.

Design of portal frame buildings: including crane runway beams and monorails/ S.T. Woolcock [et al.] 4th ed. ISBN (pbk.) Includes.

Design Optimization of industrial portal frame with overhead cranes

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Views 11 Downloads 1 File size 7MB. Analysis of Major Characters Mr. Kapasi Mr. Kapasi believes that his life is a failure and longs for something more.

This textbook describes the rules for the design of steel and composite building structures according to Eurocodes, covering the structure as a whole, as well as the design of individual structural components and connections. In addition, the fabrication and erection procedures, as well as the related quality requirements and the quality control methods are extensively discussed including the procedures for bolting, welding and surface protection. The book is supplemented by more than fifty numerical examples that explain in detail the appropriate procedures to deal with each particular problem in the design of steel structures in accordance with Eurocodes.

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Design of Steel Structures to Eurocodes