Study On Effects Of Lateral Connectting Section Steel On The Working Performance Of SRC Floodgate Pillar

The radial gate floodgate pillar in hydraulic and hydropower Engineering outlet structure is the key structure to support the radial gate and make sure it run safely under high water thrust. With the continuous development of the hydraulic and hydropower project, the application of large span and high head of radial gate floodgate pillar is increasing. Due to the requirements of the layout, investment and other factors, it is difficult for the convenient reinforced concrete floodgate pillar to run reliably under the high thrust, without increasing the size of the pillar or changing the requirements of layout. The application of the pre-stress technology in floodgate pillar, although it bring in partial settlement of the bearing capacity of radial gate floodgate pillar under high thrust and the controlling of concrete cracks, but there are still some problems exist in pre-stressed floodgate pillar, for example the high pull-anchor coefficient of pre-stressed anchors, difficulty in construction and costing much construction materials, which is not easy to be solved. Preliminary research shows that the design of radial gate floodgate pillar with steel reinforced concrete is reasonable, It is also one of the most effective ways to solve the problem of force-deformation of high thrust radial gate floodgate pillar. However, there are few researches on this field at home and abroad, and it remains a lot of questions to be further studied. According to the characteristics of steel reinforced concrete, on the basis of the existing research results, this paper carry out the research of effects of lateral connecting section steel on the working performance of SRC floodgate pillar combined with the actual situation of the proposed project.In this paper, based on the existing research results, using the finite element software ANSYS to establish the finite element model combined with the actual situation of the proposed floodgate pillar. From the aspects of the displacement, stress, crack distribution and bearing capacity of the floodgate pillar, the rationality of setting the lateral connection section steel between the two sides of the steel in steel concrete floodgate pillar is demonstrated, on this basis, the influence of the arrangement form and the section form of the lateral connection section steel on the working performance of the steel reinforced concrete floodgate pillar is studied. Through analysis and study there are following main conclusions:(1) Under the condition of asymmetric load, the lateral connection can improve the working performance of floodgate pillar. Under the condition of symmetrical load on floodgate pillar, setting lateral connection section steel or not has little effects on the working performance of the floodgate pillar. Under the condition of asymmetric load, the arrangement form of lateral connecting section steel has effect on both maximum displacement and maximum stress of floodgate pillar. The lateral connection section steel arranged at the neck of the bracket and pier body section steel and bracket section steel corss is the most favorable to improve the bearing capacity of floodgate pillar.(2)It is advantageous to improve the initial crack load of the floodgate pillar in the setting of lateral connecting steel. The lateral connecting section steel arranged at the neck of the bracket and pier body section steel and bracket section steel corss is the most favorable to improve the initial cracking load of the floodgate pillar.(3)The lateral connection steel with different section form, such as I-shaped, T-shaped and channel. Relatively speaking, the maximum tension stress and the maximum displacement of floodgate pillar with I-shaped lateral connection steel was the lowest under the same loading condition, I-shaped section steel is more suitable for using as lateral connection section steel.