Effect of Joints and Bearing Supports on Load Bearing and Deformation Capacities for Space Structures

在空间结构抗震设计中，结构与其他支承结构的相互作用可能成为非常重要的因素。然后，为明确支座水平弹性刚度为标准设计，进行了试验研究，并以水平刚度为参数，对双层圆柱屋顶的地震响应进行了数值研究。其次，提出了一种用于空间结构的新型滞回阻尼器。这种新型滞回阻尼器是一种受剪切力而不受轴向力作用的短管阻尼器。这种新的阻尼器能够抵抗任何方向的水平地震荷载。实验研究了阻尼器的滞回曲线。结果表明，阻尼器的滞回曲线为滑移型，新的滞回曲线很容易取代已加载的阻尼器。数值研究了管状滞回阻尼器对空间结构地震反应的影响。实验结果表明，该阻尼器具有滑移型滞回特性。得到以下结果：(1)标准销式支座的水平刚度随加载状态而变化。(2)随着支座水平刚度的增大，响应位移和响应速度变小，主导频率增大；其变化程度主要取决于拱方向的水平刚度，而不是沿边缘的水平刚度。(3)无论滑移类型如何，阻尼器都能减小地震荷载作用下各响应和总输入能量的最大值。(4)管状滞回阻尼器的弹塑性性能是其他阻尼器的三分之一。

For a seismic design of space structures, the interaction between structures and the other supporting structures may become very important factor. Then, some experiments were carried out in order to make clear the horizontal elastic rigidity of bearing supports being a standard design, and seismic responses of a double-layer cylindrical roof are numerically studied with a parameter of the horizontal stiffness. Secondly, a new type of hysteretic dampers is presented to be used for space structures. The new hysteretic damper is one short tubular that is subjected to shear forces and not any axial force. The new damper is able to resist against horizontal seismic loads of any direction. The hysteretic curves of dampers are experimentally investigated. As a result, it was founded that the hysteretic curve is a slip type and a new one easily replaces the loaded damper. The effect of tubular hysteretic dampers on seismic responses of space structures is numerically investigated. The damper has hysteretic characteristics of the slip type, obtained by the experiments. The following results are obtained ; (1) The horizontal rigidity of the standard pin-support varies corresponding to the loading state. (2) With increasing the horizontal stiffness of bearing supports, the response displacements and response velocity become small and dominant frequencies become larger. The degree of changes remarkably depends on the horizontal stiffness in the arch direction than the horizontal stiffness along the edges. (3) The damper can reduce the maximum value of each response and total input energy by seismic loads in spite of the slip type. (4) The performance of tubular hysteretic dampers is one-third of the other dampers being the perfect elasto-plastic characteristics.