Energy Based Design of a System Combined of Damper and Displacement Controller for Seismically Exited Structures

本文提出了一种将流体阻尼器和位移控制器相结合的硬化型磁滞装置。该系统能有效地控制安装在结构中的建筑物的反应。下文描述了两个主要目标。提出了一种双重设计方法，以提高在中等地震下的宜居性，并防止在严重地震下的破坏蔓延：在该系统中，当受到中震时，安装耗能阻尼器降低了建筑物的反应，改善了建筑物的宜居性。当发生严重地震时，位移控制器抑制过大的楼层位移，而流体阻尼器则消耗能量。这意味着建筑结构由流体阻尼器的抗震控制体系转变为普通的刚性支撑抗震体系。通过这种效果，防止了结构损伤的扩散。通过sh…验证了该系统的有效性。在东北大学安装了更多的台架试验，并通过考虑各种条件的钢筋混凝土建筑的分析进行了进一步的研究。提出了一种控制建筑物在强震作用下反应楼层位移的设计方法：在该系统中，当受到强烈地震作用时，位移控制器抑制建筑物过大的楼层位移，并按设计的方式控制楼层位移的分布。利用该体系，可以通过抑制由于结构的刚度和/或强度分布的不规则性或高阶振型的贡献而引起的局部过度位移，从而获得统一的楼层位移分布。本文提出了在设计位移水平下，通过能量响应、地震输入能量的平衡以及结构和阻尼器的耗能来计算所需阻尼器数量的设计方法。通过在东北大学安装的振动台试验验证了该设计方法的有效性，并通过钢筋混凝土结构在考虑刚度和/或强度分布以及地震特性等各种情况下的分析进一步研究了该方法的有效性。较少

In this study a new device with hardening type hysteresis is proposed, combining fluid damper and displacement controller. This system is effective to control the response of buildings when it is installed in the structures. Two major objectives are described in the following.1. To develop a dual design method to improve habitability under a moderate earthquake and prevent the spread of damage under severe earthquake:In this system when subjected to a moderate earthquake, installed damper consuming energy decreases the response of buildings and improves the habitability. When subjected to a severe earthquake, the displacement controller restrains excessive story displacement while fluid damper consumes energy. This means that the building structure is change from the seismic control system with fluid damper to the normal earthquake resistant system with stiff braces. From this effect spread of structural damages are prevented. The effectiveness of this proposed system is verified by sh … More aking table tests installed in Tohoku University and furthermore investigated by analyses for reinforced concrete buildings considering various conditions.2. To develop a design method to control the response story displacement of a building under severe earthquake:In this system when subjected to severe earthquake, the displacement controller restrains excessive story displacement of the building and controls the distribution of story displacement as designed one. Using this system, unified distribution of story displacement can be obtained by restraining excessive local displacements caused by the irregularity of stiffness and / or strength distribution in a building or the contribution of higher modes. In this study the design method is proposed to calculate necessary damper quantity by energy response, equalizing input energy from earthquake and consuming energy by structures and damper at design displacement level. The effectiveness of this design method is verified by shaking table tests installed in Tohoku University and furthermore investigated by analyses for reinforced concrete buildings considering various conditions such as the distribution of stiffness and / or strength and earthquake characteristics. Less