An Alternative Architectural Configuration to Increase the Seismic Resistance of Buildings

9503200 Villaverde要通过调谐质量阻尼器显著增加结构的阻尼力，必须使用质量较大的阻尼器。避免使用额外质量的一种可能方法是使用建筑物屋顶作为阻尼器的质量。为此，必须将屋顶与建筑的其余部分隔离，将其连接到弹簧和仪表盘，然后将这些连接到建筑的其余部分。然而，更方便的是，人们可以利用基础隔震技术所取得的进步，使用弹性支座来代替弹簧。本研究的目的是对实际建筑进行数值研究，并通过两个五层钢结构小比例模型进行试验研究，以证明这种结构形式是一种可行的构造阻尼器的方法，可以增加建筑的阻尼力，提高建筑的抗震能力。数值研究将调查在实际建筑中达到预期效果所需的承载尺寸，其支座所经历的位移的数量级，当结构的应力超过其弹性极限时建筑-阻尼器系统的行为，以及使用这种技术实现真实建筑的设计困难。实验研究将通过在振动台上测试这两个建筑模型来进行。其中一个型号将采用传统配置建造，另一个将根据拟议的配置建造。这项研究将用于验证数值模型的结果，而不包括建筑物及其弹性支座的分析模型中涉及的假设和不确定性。这些研究的结果有望从数字和实验上证明拟议技术的可行性和有效性，将澄清使用该技术提出的一些问题，如果被证明有效，将为大规模实验计划的规划提供激励、理由和所需的信息。***

9503200 Villaverde To augment the damping of a structure significantly through a tuned-mass damper one has to use a damper with a large mass. A possible way to avoid the use of an additional mass is to use the building roof as the damper's mass. For this, one has to isolate the roof from the rest of the building, connect it to a spring and a dashpot, and then connect these to the rest of the building. More conveniently, however, one can take advantage of the progress made in base isolation technology and use elastomeric bearings instead of springs. The purpose of the proposed research is to conduct a numerical study with an actual building and an experimental study with two small-scale five-story steel building models to demonstrate that such a configuration is a viable way to construct a damper, to augment the damping in a building, and to increase its resistance to earthquake excitations. The numerical study will be carried out to investigate the bearing dimensions needed to attain the desired effect in a real building, the order of magnitude of the displacements experienced by its bearings, the behavior of the building-damper system when the structure is stressed beyond its elastic limit, and the design difficulties in implementing a real building with such a technique. The experimental study will be performed by testing on a shaking table the two building models. One of the models will be built with a conventional configuration and the other according to the proposed one. This study will serve to verify the findings from the numerical one without the assumptions and uncertainties involved in the analytical modelling of the building and its elastomeric bearings. The results of the studies are expected to demonstrate numerically and experimentally the viability and effectiveness of the proposed technique, will clarify some of the questions posed by its use, and, if proven effective, will furnish incentives, the justification, and the needed information for the planning of a large-scale experimental program. ***