基于建筑需求的新型黏滞阻尼器开敞式布置机构研究

黏滞阻尼器耗能减震结构的减震效果与阻尼器在结构中的安装方式密切相关，已有黏滞阻尼器布置机构主要考虑结构减震需求和安装连接简单方便，而未考虑建筑需求。针对现有黏滞阻尼器布置机构占用结构框格内空间、阻碍视野的不足，提出了一种新型黏滞阻尼器开敞式布置机构。介绍了开敞式布置机构的构造与工作原理，并对机构的力学性能进行理论分析，推导了位移放大系数和等效阻尼比计算公式。设计并制作了一个设置黏滞阻尼器开敞式布置机构的钢框架试件，给试件施加正弦位移激励，分析了开敞式布置机构在动力作用下的受力性能，以及在不同位移幅值、频率工况下，框架侧移与阻尼器两端相对位移之间的关系，验证了该文提出的位移放大系数计算公式的准确性。采用SAP2000对比分析了一个无控钢框架结构，以及设置阻尼器对角布置机构和开敞式布置机构后的减震性能，验证了该新型布置机构在实际工程中应用的可行性。

A NOVEL VISCOUS DAMPER INSTALLATION CONFIGURATION CONSIDERING ARCHITECTURAL REQUIREMENTS

The damping effect of energy dissipation system with viscous dampers is closely associated with their installation configurations in the structure.The damping requirement and simple convenient connection are mainly concerned in the existing viscous damper installation configurations,but the architectural requirements are not considered.Aiming at the drawback of existing viscous damper installation configurations,which occupy the entire bays in frames and obstruct the vision,a novel viscous damper installation configuration is proposed.The structure composition and working principle of the open viscous damper installation configuration were introduced.Its mechanical characteristics were analyzed theoretically,and the calculation formulas for the displacement magnification factor and effective damping ratio of the configuration were proposed.A steel frame specimen installed with open configuration was designed and produced.By applying sinusoidal displacement excitation on the specimen,the mechanical behavior under dynamic load and the relationship between the frame lateral displacement and the relative displacement of both ends of the damper under different displacement amplitudes and frequencies were analyzed,which verified the accuracy of the calculation formula for the magnification factor proposed in this paper.The seismic behavior of an uncontrolled steel frame structure and two controlled structures installed with diagonal brace and open viscous damper configurations were analyzed using SAP2000,which verified the feasibility of the open viscous damper installation configuration in practical engineering.