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Diagram of a structure featuring plastic hinges. In the structural engineering beam theory, plastic hinge is the deformation of a section of a beam where plastic bending occurs. [1] In earthquake engineering plastic hinge is also a type of energy damping device allowing plastic rotation [deformation] of an otherwise rigid column connection. [2]
Concrete hinges are hinges produced out of concrete, with little or no steel in the hinge neck, which allows a rotation without a significant bending moment. [1] The high rotations [2] [3] result from controlled tensile cracks as well as creep. [4] [3] [1] Concrete hinges are mostly used in bridge engineering [1] as monolithic, simple, economic ...
Plastic Bending Stress Distribution. Plastic bending [1] is a nonlinear behavior particular to members made of ductile materials that frequently achieve much greater ultimate bending strength than indicated by a linear elastic bending analysis. In both the plastic and elastic bending analyses of a straight beam, it is assumed that the strain ...
A flitch beam is a simple form of composite construction sometimes used in North American light frame construction. [3] This occurs when a steel plate is sandwiched between two wood joists and bolted together. A flitch beam can typically support heavier loads over a longer span than an all-wood beam of the same cross section.
A laser cut plywood box with two living hinges. A variant on the kerf bend can be used to create living hinges in laser cut wood. The technique is popular for making light-duty hinges with large radii. [7] It is also possible to create a living wood joint by hand, but the result is less accurate. [8]
Other reasons for covering concrete with synthetic resin flooring are to improve resistance to chemicals, enhancing resistance to impact and wear, and for aesthetic appearance purposes. Seamless polymer flooring can take many forms: [8] Floor seals applied at less than 6 mil (0.15 mm) Floor coatings applied at 6 - 12 mil (0.15 – 0.3 mm)
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The floor systems are mostly built from pre-topped double tees. This system evolved from the earlier use of tee systems where the flanges of the T-beams were connected. The concrete is then poured at the top of the tees during the construction to create the floor surface, hence the process is called field-placed concrete topping.
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