Portal frame

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

Automatic water washing device for plate and frame filter press

Abstract: The utility model discloses an automatic water washing device for a plate and frame filter press. The device comprises a pulley rail, a pulley, a portal frame and a flushing device, wherein the portal frame is fixedly connected with the bottom of the pulley and reciprocates together with the pulley along the pulley rail; and the flushing device moves up and down along rails in two doorframes of the portal frame. Compared with the traditional automatic water washing device for the plate and frame filter press, the utility model has the advantages that: the height of the automatic water washing device can be reduced by about 1/2, so that the height of the whole device is reduced, the whole device has a neat and attractive appearance and is convenient to package and transport, heights of plants with the equipment are reduced, and the construction cost of a user is reduced.

Wind loads on the frames of industrial buildings

Abstract: The structural response of typical, gable-end, low roof pitch industrial buildings, in a windstorm is dependent on the wind loads used in the design of cladding and the portal frame structure. Critical, structural wind load effects derived from wind loads measured on a wind tunnel model show that standards such as AS/NZS 1170.2 can produce unconservative design load effects on the heavily loaded first internal frame. This paper forms part of wider study that assesses the vulnerability of hot rolled steel, industrial buildings to wind loads. The knee and ridge bending moments and horizontal and vertical reactions at the base of the frame are the critical load effects that are used in the design of structural members and connections of these types of buildings. This study found that some of these load effects based on external pressures are under-estimated by about 30%, when the building is located in a suburban environment. A dominant windward wall opening can effectively double the design load effects, thus significantly increasing the vulnerability, especially if this scenario has not been considered by the designer.

Appliance to facilitate construction of small buildings - has platform of adjustable height, mounted on wheeled chassis

Abstract: The frame facilitates the construction of buildings of a relatively low height. It consists of two uprights (3) which are mounted on feet (1). Each end of each foot is supported on a wheel (2). Each upright (3) supports an upper part (4) which can be height adjusted relative to the lower part (3). The upper parts support a cross-member (11) to form a portal frame. This cross-member is equipped with a carriage (12) which is provided with lifting tackle. The upper parts of the uprights support a platform (5) which can be raised and lowered to suit the height of the building. USE - Building industry.

Application of the compressive-force path concept in the design of reinforced-concrete indeterminate structures - a pilot-study

Abstract: In the past, physical models have been proposed, in compliance with the concept of the compressive-force path, for the realistic design of various statically determinate structural concrete members. The present work extends these models so as to encompass indeterminate RC structural forms. Pilot tests conducted on continuous beams and fixed-ended portal frames have revealed that designing such members to present-day concepts may lead to brittle types of failure. On the other hand, similar members designed on the basis of the proposed physical models attained very ductile failures. It appears that, unlike current design approaches, the compressive-force path concept is capable of identifying those areas where failure is most likely to be triggered, and ensures better load redistribution, thus improving ductility. The beneficial effect of proper detailing at the point of contraflexure in an indeterminate RC member is to be noted.