Portal frame

About: Portal frame is a research topic. Over the lifetime, 1778 publications have been published within this topic receiving 7210 citations.

Optimum plastic design of a portal frame for alternative loads.

Abstract: : Minimum-weight design of a portal frame for alternative combinations of horizontal and vertical loads is discussed. It is shown that the usual proof of the existence of a Foulkes mechanism as a necessary condition for minimum weight cannot be carried over to this problem. (Author)

Experimental full-scale tests on steel portal frames for development of diaphragm action – Part I experimental results

Abstract: Previous studies on stressed skin effect of industrial steel buildings showed discrepancies between the ECCS formulae and experimental results. To clarify the discrepancies full-scale experimental test program was planned and executed by the Budapest University of Technology and Economics, Department of Structural Engineering. The aims of the full-scale tests were to refine the stressed skin design method and to adjust it to the nonstandard cladding structural system applied by an industrial partner. During execution of the full-scale experiments the shear flexibility of those industrially applied nonstandard diaphragms were examined, where the application of seam fasteners were rejected. Next to the building section a loading frame was built, so that tension and compression force could be applied to each frame, in order to examine the in-plane shear flexibility of the whole nonstandard diaphragm assembly, including the shear flexibility of the portal frame. In the test series four purlin and two trapezoidal sheeting height configurations were combined in more than 100 tests. This paper, denoted as Part I shows the test setup and introduces the results derived from the ECCS formulae, underlining the importance of extending the applicability of the current design formulae to nonstandard cases, which are often applied in industrial practice all over Europe. A companion paper (Part II) presents the comparative results between the various cladding configurations, also the main conclusions regarding the stiffening effect of the applied diaphragm configurations, and reports the effect of change in section size to shear flexibility. Besides this in Part II the effect of different structural components in regards to shear flexibility is underlined.

Planer -type work piece device of putting on shelf

Abstract: The utility model discloses a planer -type work piece device of putting on shelf, its characterized in that, it includes that the activity set up on guide rail, the guide rail portal frame, frame motor, activity that the drive portal frame removed along the guide rail set up bracket on the portal frame, connect and follow the elevator motor that lift guiding mechanism reciprocated in the bracket with lift guiding mechanism and the drive carrier who advances between the portal frame, are provided with the feeding and violently send the mechanism on the bracket for send the work piece on the bracket into goods shelves The utility model discloses simple structure operates steadily, and production efficiency is high

Method and equipment for construction of concrete cylinder

Abstract: The construction method for concrete cylindrical shaft without derrick and scaffold is characterized by that the lifting portal frame is attached to the wall of the shaft body, it has lifting device, the portal frame can be raised along the wall of the shaft, it has platform and form board system to play the role of derrick and scaffold; it utilizes coordinate, centering method to control the central axis of the cylindrical shaft free from deviation, the present method is suitable for construction of concrete cylindrical shaft of any height with no need of derrick and scaffold, so that it can save steel material and raise economic benefit.