ANALYSIS OF IRRIGATION STEEL VERTICAL GATES WITH DIFFERENT SYSTEMS

All types of barrage structures require different types of gates and stop logs to control flows over sill ways and weirs during operation. Two cases of loading are implemented in the design of the vertical gates; under water load (operation), and the crane (lifting) conditions. The main objective of this study is to propose and investigate new systems for the design of vertical hydraulic gates to make their cost effective. The new proposed system is the honeycomb structure. The primary advantage of such system is its rigidity from folded plates and high strength with light weight. A finite element model of Naga Hammadi stop log vertical left gate using SAP program (2000-ver 14.2.4-2012) [1] has been developed. The different elements of the lifting gate are designed with the Allowable Stress Design (ASD) method according to the Egyptian Code of design of buildings and bridges, (ASD). The results obtained from the finite element model were compared with those obtained from ECP, (2008) [2]. Also A finite element models were performed to the new proposed systems using Honeycomb sandwich structures with different types of cores, (square, rhombus and hexagonal) and different sizes for each shape of the honeycomb core. The three types of sandwich honeycomb stoplog panels provide acceptable stress results while allowing weight reduction compared with the traditional stoplog panel, especially the square sandwich honeycomb panel that provided the largest weight reduction.