Damage Control of Transportation Structures Using Intelligent Magnetorheological Dampers

9912569 RoschkeUS日本的合作研究工作将集中在最大限度地减少强震对连续梁桥造成的损害。 调查将集中在收购的磁流变（MR）阻尼器，开发的机器人神经模糊控制算法，实验全面实施，和损坏的轴承系统在测试过程中。 其目的是证明通过在一个主要的建筑设施的子组件补充阻尼振动控制。 磁流变阻尼器技术的成功是迫在眉睫的，需要多次大规模的实验来验证改善地震破坏效应的方法，磁流变阻尼器将在美国德克萨斯州学院站的德克萨斯A M大学建造。 研究团队的这一部分还将建立阻尼器行为的神经网络表示。 同时，东京大学和德克萨斯A M大学将联合开发一种神经模糊算法，用于在地震激励期间控制MR阻尼器。 最后，阻尼器将被安装在一个全面的动态测试的桥梁轴承，有同时在其两个平面内的方向运动。 该技术的成功演示旨在鼓励在城市地区建造和维护连续梁桥的政府机构考虑在新建和改造桥梁设计中使用MR阻尼器作为补充阻尼装置。该项目得到NSF 98-36下第三年竞赛的支持。“美日城市地震减灾合作研究。"

9912569RoschkeUS Japan collaborative research effort will be made here to focus on minimizing damage caused by a strong motion earthquake to continuous girder bridges. Investigations will center on acquisition of a magnetorheological (MR) damper, development o a robot neural-fuzzy control algorithm, experimental full-scale implementation, and damage of a bearing system during testing. The goal is to demonstrate control of vibrations through supplemental damping in a subcomponent of a major constructed facility. Success of magnetorheological damper technology is imminent and needs multiple large-scale experiments for verification of the approach to amelioration of damaging effects of earthquakes.A magnetorheological damper will be constructed at Texas A&M University in College Station, Texas, USA. This portion of the research team will also establish a neural network representation of the behavior of the damper. Concurrently, a neural-fuzzy algorithm will be developed jointly by The University of Tokyo and Texas A&M University for control of the MR dampers during seismic excitation. Finally, the dampers will be installed in a full-scale dynamic test of a bridge bearing that has simultaneous motion in its two in-plane directions. Successful demonstration of this technology is intended to encourage governmental agencies that construct and maintain continuous girder bridges in urban areas to consider using MR dampers as supplemental damping devices in new and retrofit bridge designs.This project is supported under the 3rd-year competition under NSF 98-36. "US Japan Cooperative Research in Urban Earthquake Disaster Mitigation."