An Alternative Architectural Configuration to Increase the Seismic Resistance of Buildings

9503200 Villaverde为了通过调谐质量阻尼器显著增加结构的阻尼，必须使用具有大质量的阻尼器。 避免使用附加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，必须将屋顶与建筑物的其他部分隔离，将其连接到弹簧和减震器，然后将这些连接到建筑物的其他部分。 然而，更方便的是，人们可以利用基础隔震技术的进步，使用弹性支座代替弹簧。 建议的研究的目的是进行一个实际的建筑物的数值研究和两个小规模的五层钢结构建筑模型的实验研究，以证明这样的配置是一个可行的方式来构建一个阻尼器，以增加阻尼的建筑物，并增加其抵抗地震激励。 数值研究将进行调查轴承尺寸需要达到预期的效果，在一个真实的建筑物，其轴承所经历的位移的数量级，建筑物阻尼系统的行为时，结构的应力超过其弹性极限，并在实施一个真实的建筑与这种技术的设计困难。 试验研究将通过在振动台上测试两个建筑模型来进行。 其中一个模型将使用传统配置构建，另一个模型将根据建议的配置构建。 本研究将用于验证数值模拟的结果，而不涉及建筑物及其弹性支座分析建模中的假设和不确定性。 研究结果预计将在数值和实验上证明所提出的技术的可行性和有效性，将澄清其使用所提出的一些问题，如果被证明是有效的，将提供激励措施，理由和所需的信息，规划一个大规模的实验计划。 ***

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. ***