What is a concrete portal frame?
Precast Concrete Portal Frames are a combination of two columns and a normal beam with additional bending strength, to form a U shape. Units are designed for individual projects meaning the entire Portal Frame structure can be tailored to exact customer specifications.
What is the maximum span of a portal frame?
50 m
The vast majority of portal frames use hot-rolled steel sections for the column and rafter members. Using such sections, frames economically achieve spans of up to 50 m [2]. For longer span frames, an alternative to the use of hot-rolled steel sections could be fabricated steel beam sections [3], [4].
What is prefabricated concrete portal frame?
Precast portal frames can be defined as two-dimensional rigid frames that have a rigid joint between the precast column and beam. The precast beamforming the roof at the top can be pitched or sloped.
What is the purpose of portal frame?
Portal frames can be defined as two-dimensional rigid frames that have the basic characteristics of a rigid joint between column and beam. The main objective of this form of design is to reduce bending moment in the beam, which allows the frame to act as one structural unit.
Why are portal frames used?
Portal frames are a simple and very common type of framed (or skeleton) structure. Steel portal frames, in particular, are a cost-effective structural system to support building envelopes (such as warehouses and shopping complexes) requiring large column-free spaces.
What are portal frames used for?
What are concrete frames?
A concrete frame is a common form of structure, comprising a network of columns and connecting beams that forms the structural ‘skeleton’ of a building. This grid of beams and columns is typically constructed on a concrete foundation and is used to support the building’s floors, roof, walls, cladding and so on.
What are the advantages of portal frames?
Advantages of Portal Frames Quick and easy to build. Cost-effective. Can be used for multiple purposes. Low maintenance.
What are precast concrete portal frames?
Precast Concrete Portal Frames are a combination of two columns and a normal beam with additional bending strength, to form a U shape. Units are designed for individual projects meaning the entire Portal Frame structure can be tailored to exact customer specifications.
What are portal frames made of?
Portal Frames. Precast Concrete Portal Frames are a combination of two columns and a normal beam with additional bending strength, to form a U shape. The units are designed for individual projects meaning the entire Portal Frame structure can be tailored to exact customer specifications.
What is structural analysis of concrete frames?
Structural Analysis of Reinforced Concrete Frames The moments, shears, and axial forces using the Portal Method are determined for the following frames resulting from wind loads acting in the directions shown in the figures.
What is the difference between units and precast concrete frames?
Units are designed for individual projects meaning the entire Portal Frame structure can be tailored to exact customer specifications. Our Precast concrete frames are manufactured before actual construction starts and then is transported to site for erection.