Study on Correlation Between Seismic Isolation Performance and Compressive Stress of Waste Scrap Tire Pads Under Thermal Oxygen Aging

In order to study the isolation performance and compressive stress-related performance of waste scrap tire pads (STP) under thermal oxygen aging. 6 layer STP whose size is 180 mm×180 mm×69 mm were subjected to the aging temperature of 100℃ for 77 h, 154 h, 231 h, and 308 h in the hot air accelerated aging test. The under-wall pseudo-static test and theoretical analysis of the accelerated and degraded laminated tire isolation pad under different compressive stress (4 MPa, 5 MPa, 6 MPa) were carried out. The effects of aging time and design compressive stress on the vibration isolation performance of the waste scrap tire pads under the wall isolation structure were studied quantitatively. Combined with the internal and external damage behaviors of STP in the test, such as deformation, degumming, wire mesh failure and crack propagation, the action mechanism of thermal and oxygen erosion environment on STP was comprehensively expounded. Besides, the attenuation law of isolation performance and degradation of the new type of isolation system under village walls were proposed. The experimental results show that the new scrap tire pads structure system has good isolation, limit and reset effects. STP has stable mechanical properties and reliable isolation performance in the whole life cycle of the building structure. 5 MPa which compressive stress is suggested in actual construction shows the most stable isolation performance before and after degradation. The research results are expected to provide a theoretical basis for the popularization and application of the new type of waste scrap tire pads structure under walls in rural areas. © 2020, Materials Review Magazine. All right reserved.