EXPERIMENTAL EVALUATION AND SIMULATION OF GEODESIC STRUCTURES OF BAMBOO RE-INFORCED WITH TIES

Abstract

The objective of this work is to analyze the behavior of geodesic structures built with cylindrical bamboo bars reinforced with nylon cables by means of loading tests and computer simulation. Geodesic domes were modeled in the shape of a half truncated icosahedron and was built with solid commercial bamboo bars Phyllostachys pubescens,with 4 mm in diameter and 175 mm in length. ANSYS computer simulation software was used to model three-dimensionally and to simulate a dome structure under the action of vertical loads, with reinforcement of cables and also to simulate a wind action on a solid geodetic. With a reformed structure, loads were made, for each load was measured or vertical displacement of the upper surface in relation to the base. The numerical model was simulated with the same chargers and, afterwards, comparisons were made between the numerical results and the experiments. The tests show hat the structure supports a load of 38 times its own weight, presenting a great deflection without breaking. Resistant to comparison or double the final vertical load, with only 40% deflection. Published by the structure without reinforcement, showing the effectiveness of using nylon cables as tied reinforcement. Such behavior was predicted by numerical simulation. After carrying out the usage tests and running a computer simulation, it was possible to locate the regionswith the highest stresses and to identify the possible break points of the structure. In this work it was also simulated or the behavior of the geodesic structure covered by a shell, under a wind action with different movements, showing the distribution of the pressure exerted by the flow of a structure.