Portal frame

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

Simple Illustration of Frame Instability

Abstract: The problem of frame instability is not confined to tall and indeterminate frameworks. The problem is elucidated through an example of a three-hinged portal frame. The commonly accepted analysis of this frame is shown to be grossly unconservative. Several approximate and exact analyses are presented. They show that the essence of correct stability analysis is the proper accounting for load distribution within the frame under deformation. A simple test of this frame is described. Results confirm the analysis within the accuracy to be expected. It is concluded that there is a need for improved design aids to find the effective lengths of compression members in frames.

Off -line multifunctional mobile phone shell check out test set

Abstract: The utility model belongs to the technical field of product quality detecting equipment technique and specifically relates to off -line multifunctional mobile phone shell check out test set, includingthe frame, be equipped with marble platform in the frame, last two Y -axis track that parallel and the portal frame of being equipped with of marble platform, the portal frame strides across Y -axistrack, is equipped with X axle track on the portal frame, article two, set up first tool and second tool on the Y -axis track, for a Y axle alternating movement form of advancing one between first tool and the second tool, the gallows is removed in the equipment on the X axle track on the portal frame, and the equipment has industry camera, light source base and laser displacement ware on the removal gallows, by this, wait the cell -phone shell that detects and place at first tool or second tool and remove the portal frame below that industry camera, light source base and laser displacement ware are followed and is removed gallows removal, industry camera adversary casing plane size detection, and the high size detection of laser displacement ware adversary's casing. Simple structure, scientific and reasonable uses and maintains portably, detection efficiency and precision are high.

Track portal jib crane

Abstract: Track portal jib crane is including portal frame (1), cart travelling mechanism (2), dolly assembly (3), wire rope (4), gallows (8), hoist (13) and case roof beam (14), portal frame (1) top horizontal installation case roof beam (14), portal frame (1) bottom landing leg is installed on cart travelling mechanism (2), on case roof beam (14) installation vehicle assembly (3), connects gallows (8) through wire rope (4) below dolly assembly (3), installs hoist (13) under gallows (8). Through motor slide height and side -to -side adjustment, balancedly about can improving stabilize the effect, area is little, increase of service life, convenient and practical practices thrift the cost, and the efficiency improves. The reinforcing portal frame can cushion outside impulsive force to the holding power of case roof beam, avoids taking place to rock the operation safety and stability.

Timber Portal Frames vs Timber Truss-Based Systems for Residential Buildings

Abstract: A large number of structures have been built during or after the construction of a house or residential-zoned building, which are not built at the same time and/or integrally with the structural integrity of the residential dwelling. These include carports, pergolas, sheds, and barns. The typical method of constructing these structures is a general timber truss and column system. The aim of this study is to look at the feasibility and economic incentive that may be gained from using a timber portal frame system, similar to the steel or timber portal frames used for larger industrial constructions, over the traditional timber truss and column arrangement. In this study, designs for three cases of timber truss and timber portals were carried out using industry appropriate methods and standards. Using the design information and data gathered through talks with industry professionals, both methods of construction were compared on cost and overall time duration. From the comparison of the truss and portal designs, the use of timber portal frames over timber truss systems proved to have advantage in relation to overall cost and man power involved. This could certainly affect the current attitude towards the construction of small residential buildings in the future.