Portal frame

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

Timber cutting machine

Abstract: The utility model discloses a timber cutting machine, which comprises a frame, but but be equipped with transverse movement's clamping device longitudinal motion's cutting knife, the drive arrangement of control clamping device motion distance in the frame, clamping device is used for ordering about timber and removes, the cutting knife is used for cutting timber, the lead screw that horizontal polished rod that drive arrangement includes two mobilizable portal frames, join in marriage with the portal frame cunning and drive portal frame moved on the polished rod, the lead screw is driven by servo motor, clamping device sets up in the both ends of portal frame, clamping device includes the splint of two relative settings and two cylinders of separately -driven splint action, two cylinders set up on the portal frame respectively. The utility model aims at providing a timber cutting machine for the plank of automated production wooden block dish usefulness.

Comparison of Seismic Performance of Solid and Hollow Reinforced Concrete members in RCC framed Building using ETABS Software

Abstract: Hollow (Box-type) reinforced concrete beams and columns help in decreasing superstructure weight and hence seismic mass is minimized as compared to conventional solid reinforced concrete beams and columns. ETABS is commonly used to analyses: Skyscrapers, parking garages, steel & concrete structures, low and high rise buildings, and portal frame structures. The case study in this paper mainly emphasizes on structural behavior of R.C.C. framed building having hollow and solid reinforced concrete members. Modelling of 3-storey R.C.C. framed building is done on the ETABS software for analysis. Post analysis of the structure, maximum shear forces, bending moments, and maximum storey displacement are computed and then compared for all the analyzed cases. The results indicated that the drop in storey shear, overturning moment etc. in case of hollow members as compared to solid members in R.C.C. framed building.

Cap sealing production line for tablet canning

Abstract: The invention discloses a cap sealing production line for tablet canning. The production line comprises a workbench and a pair of portal frames arranged on the workbench, wherein the inside of one portal frame adopts a cavity structure; a transverse plate is arranged on the pair of portal frames; a counting and tablet discharging unit is arranged on the transverse plate; a conveying unit is arranged on the workbench; a stamping unit is arranged in the cavity structure of the portal frame and comprises a mold roll, an auxiliary rotating shaft and a driving clamping and conveying roller which are arranged in one supporting leg of the portal frames, an opening formed in the upper surface of a cross beam of the portal frames, a guide frame arranged on the cross beam of the portal frames, an air valve box which is arranged on the guide frame and can move in the length direction of the guide frame, a stamping mechanism and a plastic packaging machine which are arranged on the air valve box, a supporting shaft, a pair of tensioning rollers and a film winding roller which are arranged in the other supporting leg of the portal frames as well as a push mechanism arranged on one supporting leg of the portal frames. The production line has the beneficial effects of simple structure and high practicability.

Experimental study of the seismic response of container cranes

Abstract: As container traffic increases, ships and the cranes that serve them also continue to grow. The larger size and mass of modern container cranes makes them more seismically vulnerable then their predecessors. Container cranes are essential for port operations, and economic losses from their downtime can be substantial. A container crane can be divided into three main sections: the portal frame, a second story and the A-frame. The majority of the response of a container crane to dynamic loading occurs in the portal frame. This study investigates a way to model the container crane without the A-frame, while maintaining the same response in the portal frame. Finite element models of a complete container crane and cranes with modifications to simulate the proper mass and stiffness distribution without the A-frame are created. These results are used to design a large scale model for a shake table experiment that investigates the three failure modes previously observed in earthquakes: derailment, local buckling of the legs, and collapse. Copyright 2010 ASCE.

Wooden portal frame and multilayer wooden portal frame and wooden building using them

Abstract: PROBLEM TO BE SOLVED: To form a large opening towards a frontal road even at a site having a narrow frontage. SOLUTION: In built-up columns 2 for a wooden portal frame 1, the built-up columns 2 are constituted by disposing two columns 4 and 4 in upright in parallel while the column bases of the columns are joined with the top end of a foundation 6 through connecting members 5. In a built-up beam 3, the two beams of an upper-stage beam 14 and a lower-stage beam 15 are arranged in parallel, and the built-up beam 3 is stretched over the built-up columns 2 and 2 so that the underside of the upper-stage beam is abutted against the top faces of the columns 4 respectively and the end face of the lower-stage beam 15 is abutted against the side faces of the columns 4 on the insides in the columns 4 and 4. The upper-stage beam 14 and the columns 4 are drawn near mutually by drawing metallic materials 16 and joined after tenons projected from the top sections of the columns 4 are inserted into mortices formed to the underside of the upper-stage beam 14 in this case. Horizontal stiffening members 17 and 18 are inserted at the place of the height of the lower-stage beam 15 and the places of the column bases respectively between the columns 4, 4, and reinforcing plywood 21a to 21i are stuck on the fronts and rears of the built-up columns 2 and 2 and the built-up beams 3. COPYRIGHT: (C)2004,JPO