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Two Hinged Arch Apparatus
DESCRIPTION:
The two hinged arch is a statically indeterminate structure of the first degree. The horizontal thrust is the redundant reaction and is obtained y the use of strain energy methods. Two hinged arch is made determinate by treating it as a simply supported curved beam and horizontal thrust as a redundant reaction.
EXPERIMENT:
• To study experimentally a two hinged arch for the horizontal displacement of the roller end for a given system of loading and to compare the same with those obtained analytically.
• To obtain the influence line ordinates for horizontal thrust experimentally in a two hinged arch by moving a load along the span and to compare the same with those obtained theoretically.
TECHNICAL SPECIFICATION:
• Apparatus has a span of 100cm and rise 25cm.
• Both ends should have hinge but one of the ends should also be free to move longitudinally.
• A lever arrangement fitted at this end for the application of known horizontal inward force for measuring the horizontal thrust. Along the horizontal span of the arch various points are marked at equidistant for the application of load.
• This being a statically indeterminate structure of the first degree.
• A dial gauge with 25mm travel (with magnetic base) is to be supplied with the apparatus.
• Mild steel apparatus complete with a supporting stand and a set of weights.
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Three Hinged Arch Apparatus
The mild steel model has a span of 100cm and rise 25cm, with hinges at supports and crown. One of the ends should rests on rollers. Along the horizontal span of the arch various points are marked at equidistant for the application of load. This being a statically determinate structure, the horizontal thrust developed under the action of any load system can be theoretically calculated and will also be measured directly by neutralizing the outward movement of the roller end. A dial gauge with 25mm travel (with magnetic base) may be supplied with the apparatus. Apparatus to be supplied should be complete with a supporting stand and a set of weights.
Elastically Coupled Beam Apparatus
Apparatus consists of a three parallel bar suspension system with elastic beam at their upper and lower ends. The upper ends of the two outer suspension rods are tied to a vertical wooden board while central suspension rod may be tied to the centre of another elastic beam supported at two outer ends only. Mild steel Apparatus to be supplied should be complete with a supporting stand and a set of weights.
Suspension Bridge Apparatus
DESCRIPTION:
Cables are frequently used to support loads over large spans such as cable stayed for suspension bridges, cable car systems and stadium roof. They are used extensively for permanent guys on structures such as microwave towers and derricks. They are also used for temporary guys during erection. The only force in a cable is direct tension. They are too flexible to carry any moment. A cable is used to carry concentrated loads, uniformly distributed load along its length and uniformly distributed load along the horizontal span. It takes the shape of a polygon under concentrated loads, a catenary under uniform load along its length (such as its own weight), and a parabola under uniform load along the horizontal span.EXPERIMENT:
• Study the Extension of each spring Balance Left & Right Both. • Study of the effect of a point loadTECHNICAL SPECIFICATION:
• Apparatus Consists of two mild steel cables 0.5cm diameter in cross section and 150cm long, pinned to two supports 90cm apart situated symmetrically. • One of the ends can be converted to a roller by applying a known load at the end with the help of suspended pulley system. • Vertical loads can be applied at various points along the span of the beam. • A dial gauge with 25mm travel (with a magnetic base) is to be supplied with the apparatus complete with a supporting stand and a set of weights.
Bending Moment & Shear Force Apparatus
INTRODUCTION:
Shear Forces occurs when two parallel forces act out of alignment with each other. For example, in a large boiler made from sections of sheet metal plate riveted together, there is an equal and opposite force exerted on the rivets, owing to the expansion and contraction of the plates. Bending Moments are rotational forces within the beam that cause bending. At any point within a beam, the Bending Moment is the sum of: each external force multiplied by the distance that is perpendicular to the direction of the force.EXPERIMENT MANUAL:
1. To verify the Shear force a cross-section of the beam. 2. To verify the bending moment in cross–section of beam with a flexure condition.APPARTUS SPECIFICATION:
1. Dimensions : 158 cm X 45cm X (h)60cm 2. Total Beam Length : 160 cm with flexure 3. Width of Beam : 5 cm 4. Distance of Length in between : 5 cm 5. Height of beam : 36 mm 6. No. of Hanger for weights : 3 7. No. of Spring Balance : 2 (of 10kg) 8. Total Weight of Apparatus : 13.1 kgACCESSORY REQUIRES:
1. Shear force apparatus 2. Bending Moment Apparatus 3. Hangers 4. Weights 5. Two Spring balances – 10kgs
Elastic Properties Of Deflected Beam Apparatus
Apparatus consists of a mild steel beam 2.5cm x 3mm in cross section and 100cm long, pinned to two supports 70cm apart situated symmetrically. One of the ends can be fixed or given a known slope by applying a known moment at the end with the help of suspended loads. At the other end also a known moment can be applied. Vertical loads can be applied at various points along the span of the beam. A dial gauge with 25mm travel (with a magnetic base) may be supplied with the apparatus. Apparatus to be supplied should be complete with a supporting stand and a set of weights
Pinned Joint Model
SPECIFICATION:
Model consists of hinged. Model will be able to demonstrate the qualitative behavior of the truss under load. As are very flexible, a compression members will easily it`s bucking i.e. It will curve of plain. The tension member however remains straight and tight. The student will therefore have a visual picture of the type of stresses i.e. Compressive or tensile that member of truss will carry under various positive of the load. In case of pinned joint truss, the student will be able to observe that angle between members at each joint undergo a small change.
Redundant Joint Apparatus
Apparatus consists of three suspension members (spring balances) of different stiffness, which are jointed at a point to form the redundant joint. The upper end of the suspension members being tied in a position to a vertical wooden board. Arrangement is provided to apply a vertical load at the joint and to measure its horizontal and vertical displacement on a paper and also elongations and forces in the suspension members by the help of dial gauges. Dial gauges with magnetic base are provided with the apparatus.
EXPERIMENT:
Comparison of experimental and theoretical results of forces in the members and the component displacement of the loaded joint D of a three bar suspension system for vertical loads.REQUIRED ACCESSORIES:
• Redundant Joint Apparatus • Dial Gauge : 1 No. • Magnetic Base : 1 No. • Hangers : 1 Nos. • Weight of 500gm : As Per requirement.
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