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Cantilever beam: One end of the beam is a fixed support that does not produce axial, vertical displacement and rotation, and the other end is a free end (which can generate forces parallel to and perpendicular to the axial). In the analysis of engineering mechanics forces, a typical simplified model is compared.
In the actual engineering analysis, most of the actual engineering stressed components can be reduced to cantilever beams. The outrigger beam goes to be supported by two supporting items and is cantilevered from both ends!! Simply supported beam means that the two ends of the beam are placed on two supports, and the two ends are hinged, and in reality, it is a beam that only two ends are supported on the column, and the single-span structure mainly bears the bending moment.
Generally, it is a statically determined structure, the force is simple, there is only a positive bending moment in the middle of the span, and the temperature change of the system, the shrinkage creep of the concrete, and the tensile prestress will not produce additional internal forces in the beam. Charpy beams are simplified models of mechanics. Charpy beams are just one of the simplified models of beams, along with cantilever beams.
The cantilever beam is supported at one end and unconstrained at the other end. The simply supported beam body is lengthened and crosses the fulcrum to become an overhanging beam. The hinge of the support of the simply supported beam may be a fixed hinged support or a movable hinged support.
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Pronunciation, writing, meaning.
The technical parameters are strictly layered.
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The balance beam is used in the factory, and there are also oil-paved, and the balance beam is used for oil-paving, and the professional name is called the contact balance beam (reply to the mailbox.
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Summary. A balance beam is a commonly used component in structural engineering, usually a transverse right-angled beam that is used to support and balance other structural components.
A balance beam is a commonly used component in structural engineering, usually a transverse right-angled beam that is used to support and balance other structural components.
You've done a great job! Can you elaborate on that?
Balance beams are widely used in the fields of bridges, steel structures, buildings and machine design, and can be used to support and distribute weight, bear transverse and longitudinal loads, and play an important role in engineering structures.
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The balance beam is an important part of the hoisting machine and is widely used in lifting projects. The balance beam is also called the iron flat shoulder. It can be used to maintain the balance of the hoisted equipment and avoid damage to the equipment by the sling; Shorten the height of the sling and reduce the movable pulley.
The lifting height of ; Reduce the horizontal pressure of the equipment when lifting and avoid damage to the equipment. When multi-machine lifting, the balance beam can also reasonably distribute or balance the load of each lifting point.
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Balance Beam Classification:
1. Tubular balance beam: welded with seamless steel pipes, lifting lugs, reinforcing plates, etc., which can be used for hoisting pipes, steel structural parts and small and medium-sized equipment;
2. Steel plate balance beam: for on-site processing and production, the thickness of the steel plate is determined according to the weight of the equipment;
3. Channel steel balance beam: It is composed of channel steel, eyebolt plate, lifting lug, reinforcing plate, bolt, etc. It is characterized by the fact that the lifting point of the branch plate can be moved back and forth, and the lifting point can be selected according to the weight and size of the equipment, which is convenient, safe and reliable to use.
4. Truss balance beam: welded by various section steels, eyebolt plates, lifting lugs, truss rotating shafts, beams, etc. When the distance of the hanging point is large, the truss balance beam is generally used to increase its stiffness.
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There are contact balance beams (also known as mechanical balance beams) and non-contact balance beams used for paving.
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There is it in Douyin, you can check it.
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The balance beam is an important part of the hoisting machine, which can be used to maintain the balance of the hole contained in the hoisted equipment, avoid the first smile and avoid the damage of the sling.
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Hello. 1. Cement vibration is made of high-strength aluminum alloy material, which forms a stable frame structure.
At the same time, the weight of the fuselage was effectively reduced. The labor intensity is greatly reduced.
2. The installation of the vibrating beam is very simple and fast, and one person can complete the disassembly and assembly independently without professional tools. The working length of 4m-18m can be freely combined.
3. The operation handle of the pavement paver is operated on one side, and only one person can complete the operation of the whole machine.
4. The asphalt paver is equipped with an international famous brand gasoline engine.
Famous brand guarantee, superior performance, easy start-up;
5. The bottom plate of the leveling machine can be freely assembled and disassembled, which greatly reduces the maintenance cost;
6. The main shaft bearing of the concrete vibrating beam is imported FYH strong seismic outer ball mountain and hill central bearing to ensure the performance of the whole machine;
7. The single section of the vibrating beam can be adjusted by 5-10°, convex or concave;
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In asphalt pavement construction, the wiring method: it is to use two people to hold the two ends of a line to move horizontally to form a plane, and the leveling is carried out according to this method in construction;
Balance beam method: It is necessary for the paver to have a quasi-friendly nuclear and filial piety datum to control the flatness during construction.
Because the construction accuracy of the balance beam method is higher than the wiring method, so generally the bottom, middle and surface layers adopt the wiring method construction, and the surface layer adopts the balance beam method construction.
Preparation for construction. 1. Purchase materials that have passed the investigation and test for preparation, the ore should be classified and stacked, the ore powder must be limestone ground finely and shall not be damp, if necessary, do a good job of hardening the ore stacking site and drainage around the site and set up a mineral powder warehouse or storage tank.
2. Do a good job in the design of the mix ratio and submit it to the supervision engineer for approval, and conduct compliance inspection on various raw materials.
3. Restore the middle line (during the construction of the bottom layer) on the base layer that has passed the acceptance, and measure the horizontal measurement of the nail side pile every 5-10m at 0 3 0 5m outside the side line, pull the baseline line, and draw the side line.
4. Clean the lower bearing layer, and sprinkle the oil on the base layer two days before the construction of the bottom layer. Spray the viscous layer oil on the midsole top.
5. 28 days before the start of the test section, install the test instruments and equipment, and report the test personnel to the supervision engineer for review. 14 days before the start of each floor, all the mechanical equipment approved by the supervising engineer is prepared for the test section paving, so as to determine the loosening coefficient, construction technology, mechanical equipment, personnel organization, compaction times, and check the degree of compaction, asphalt content, mineral gradation, asphalt mixture Marshall technical indicators, etc.
Precautions for asphalt pavement construction.
1. According to the width of the pavement, 1-2 sets of high-density asphalt concrete pavers with automatic adjustment of paving thickness and leveling device, which can be heated, and are running well.
2. The bottom, middle and surface layers are constructed by the wiring method, and the surface layer is constructed by the balance beam method.
3. The paver travels evenly, and the travel speed matches the output of the mixing plant to ensure that the paved road surface is paved evenly and without interruption. During the paving process, it is not allowed to change the speed arbitrarily, and try to avoid stops in the middle of the paving process.
4 The paving temperature of asphalt concrete is adjusted according to the change of air temperature. Generally, the normal construction control is not less than 110-1300C, not more than 1650C, and it is checked and recorded at any time during the paving process.
5. Heat the screed of the paver to no less than 650C before the paving.
6. When the double machine or three machine ladder construction is adopted, the spacing between the two adjacent machines is controlled at 10 20m. The two should overlap with a width of 5 to 10 cm.
7. In the process of paving, check the quality of paving at any time, and manually fill the dust sprinkler and replace the material in time when there is segregation and lack of material in the corners.
8. Where the paver cannot be operated, manual paving construction shall be adopted after the consent of the supervising engineer.
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