Topic
Portal frame
About: Portal frame is a research topic. Over the lifetime, 1778 publications have been published within this topic receiving 7210 citations.
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09 Apr 2014
TL;DR: In this paper, the authors present the results of a full-scale experimental test on a composite floor beam designed according to American codes and standards that was subjected to elevated temperatures and found that the composite beam and connection survived heating to 600°C, but the shear tab connection fractured during cooling.
Abstract: This paper presents the results of a full-scale experimental test on a composite floor beam designed according to American codes and standards that was subjected to elevated temperatures. The test focused on the fundamental behavior and mechanics of a composite beam with end shear connections that was subjected to combined gravity loads and thermal loading, simulating realistic fire effects that included both heating and cooling. The test was conducted on a 3.80m long composite beam that consisted of a steel beam that was composite with a flat, lightweight concrete slab through the use of shear studs, and the beam was connected to a portal frame using shear tab connections. High temperature ceramic radiant heaters with independent temperature control were used to heat the steel and concrete portions of the specimen. Results from the experimental test provide insight to the behavior of composite beams and the beam-tocolumn connections at elevated temperatures. The composite beam and connection survived heating to 600°C, but the shear tab connection fractured during cooling.
2 citations
Patent•
25 Jul 2012
TL;DR: In this article, a portal frame of a vacuum load absorbing and moving robot with four uprights and four cross-rods is described, and the servo load moving guide rail rods are parallel to each other.
Abstract: The invention discloses a portal frame of a vacuum load absorbing and moving robot, which comprises four uprights; the tops of the uprights are fixedly connected through cross-rods; two servo load moving guide rail rods are arranged between the two cross-rods; every two uprights are connected through one cross-rod; and the two servo load moving guide rail rods are parallel to each other; and the uprights and the cross-rods are fixedly connected through bolts, and the cross-rods and the servo load moving guide rail rods are fixedly connected through bolts. The portal frame of the vacuum load absorbing and moving robot has the advantages of being simple in structure, capable of bearing lager load and convenient to mount and dismount.
2 citations
TL;DR: In this paper, a comparison of portal frame design by penalty function optimization and traditional method aim at 30m span portal frame with tapered members was made, it was found that the essence of optimization design was to research the reasonable distributing of sections, through the interaction between capacity and key section parameters.
Abstract: The comparison of portal frame design by penalty function optimization and traditional method aim at 30m span portal frame with tapered members was made. It was found that the essence of optimization design was to research the reasonable distributing of sections, through the interaction between capacity and key section parameters the optimization design were realized. Now the idea of green and less energy is fashionable, then optimization design is very significant in practical engineering. According to engineering statistics the optimization design can reduce 15%~30% of material quantity. In this article the selection of parameters during optimization design was expounded.
2 citations
Patent•
03 May 2017
TL;DR: In this paper, a super roomy gauge last quarter inspection trolley of compound section steel structure bridge, characterized by inspection trolley include track set spare, truss structure, portal frame, rail trucks, lift platform, locking device and electric system.
Abstract: The utility model discloses a super roomy gauge last quarter inspection trolley of compound section steel structure bridge, characterized by inspection trolley include track set spare, truss structure, portal frame, rail trucks, lift platform, locking device and electric system, track set spare is disposed under the compound section steel structure bridge both sides steel longeron, the rail trucks reversal of the natural order of things is in the recess of the I -steel track of track set spare, the portal frame is equipped with two pin altogether, corresponds through the round pin axle and connects in both sides rail trucks's below, and the truss structure penetrates the inside at two pin portal frames to hang on the portal frame, lift platform sets up the operation platform who regards as or go up and down on the truss structure, locking device is the emergency brake arrangement who sets up between portal frame and I -steel track The utility model discloses a super roomy gauge last quarter inspection trolley is particularly useful for the super wide steel structure bridge in compound section, its simple structure, safe and reliable
2 citations
Patent•
01 Feb 2017
TL;DR: The utility model has the advantages of rational in infrastructure, cost marks down, convenient and practical, has improved the cotton speed of cutting of bubble, has guaranteed the size precision who cuts again, improves production efficiency.
Abstract: The utility model discloses a simply steep cotton crosscut machine, including fixing at subaerial bearing board, bearing board top is fixed with the portal frame, be equipped with the guide rail in the portal frame relatively, still be equipped with a plurality of supporters between guide rail and the bearing board, it is equipped with the workstation to slide on the guide rail, one side of portal frame still is equipped with gliding blade from top to bottom, the blade level sets up, the utility model has the advantages of rational in infrastructure, cost marks down, convenient and practical, has improved the cotton speed of cutting of bubble, has guaranteed the size precision who cuts again, improves production efficiency.
2 citations