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弧形闸门为了减小主梁弯矩的绝对值,常把支臂与主梁的连接处布置于距梁端L/5(L为梁长)左右处,形成所谓六形弧门.常用的双主梁弧门,主梁与支臂杆形成两个平面框架,这两个平面框架有一个交角2θ.为使框架的支臂杆及主梁的腹板在交接处在同一平面内,必然要求上下支臂杆在支铰处形成一个扭角2φ.关于φ角之值,《水利水电工程钢闸门设计规范SDJ13—78》已有计算公式,吴超同志也曾著文予以研究,其计算公式为:
Arc Gate In order to reduce the absolute value of the main beam bending moment, the connection between the main beam and the main beam is often arranged at the left and right of the beam end L / 5 (L is the beam length), forming the so-called six-shaped arc gate. Double girder arc door, the main beam and the arm rod form two plane frame, the two plane frame has an angle of 2θ. In order to make the frame of the arm and girder web at the junction in the same plane, inevitably Require the upper and lower arm to form a torsion angle 2φ at the hinge.For the value of φ angle, “Water conservancy and hydropower engineering steel gate design specifications SDJ13-78” has been calculated, Comrade Wu Chao has also been studied in the text, the calculation The formula is: