基于STP的柱下新型隔震装置隔震特性研究

为解决废旧叠层轮胎垫(STP)隔震体系在村镇建筑使用中，缺少柱下STP隔震装置，限制其在村镇建筑中推广应用这一问题，设计一种基于STP的柱下新型隔震装置。对截面尺寸为100mm×100mm、140mm×140mm、180mm×180mm，高度72mm的STP在压应力4MPa、5MPa、6MPa下进行低周往复试验，结合隔震机理、破坏特征、承载力衰减、刚度退化、等效阻尼比等变化特性，研究此柱下新型隔震装置的隔震失效机理、滞回耗能特性。结果表明：此新型隔震装置中STP在不同设计压应力、截面尺寸下均有稳定的耗能能力；在水平位移±20mm下，挤压测STP内部钢丝网与橡胶脱离分开，其承载力在不同参数设计下衰减较为明显；在截面尺寸140mm×140mm、压应力5MPa作用下，新型隔震装置各项滞回耗能特性均无显著变化，建议将此参数设计作为在村镇隔震结构设计时柱下新型隔震装置中的基本参数。该研究成果为STP隔震体系在村镇建筑中的应用提供理论参考。

Research on isolation characteristics of new isolation#br#device under column based on STP

To solve the problem of the use of the scarp tire rubber pads (STP) isolation system in the rural buildings, the lack of a post-column STP isolation device is restricted, which limited its popularization and application in the rural buildings. The new shock isolation device under the column of STP can reduce the STP under the compressive stress of 4 MPa, 5 MPa, and 6 MPa for cross-sectional dimensions of 100 mm×100 mm, 140 mm×140 mm, 180 mm×180 mm, and a high of 72 mm. In the low cycle test, the seismic isolation mechanism and hysteretic energy dissipation characteristics of the new seismic isolation device under this column was studied in combination with the seismic isolation mechanism, failure characteristics, bearing capacity attenuation, stiffness degradation, and equivalent damping ratio. The results show that the STP has a stable energy dissipation capacity under different compressive stresses and cross-sectional dimensions in this isolation device; at ±20 mm, the steel wire mesh inside the STP is separated from the rubber by squeezing, and its bearing capacity is more obvious under the design of different parameters; under the cross-sectional size of 140 mm×140 mm and 5 MPa, there is no significant change in hysteretic energy consumption characteristics of the new seismic isolation device. It is recommended to design this parameter as the basic parameters of the new seismic isolation device under the column when designing seismic structures. The research results provide a theoretical reference for the application of the STP isolation system in rural buildings.