老化‒荷载耦合作用下废旧叠层轮胎隔震垫隔震性能

doi:10.13229/j.cnki.jdxbgxb20190861

Abstract

Abstract:

In order to study the seismic isolation performance of waste Scrap Tire Pads （STP） under aging-loading coupling， 6-layer STP with a geometry of 180 mm×180 mm×69 mm were selected for aging test at a temperature of 100 °C. The hot air accelerated aging test was carried out for 77h， 154h， 231h， and 308 h under the load of 5MPa. The STP with accelerated degradation were subjected to the pseudo-static test under the wall. The effects of aging time and coupling load on the hysteresis， skeleton curve， horizontal equivalent stiffness， equivalent damping ratio， residual displacement and stiffness degradation of the layered STP under the wall are analyzed. Combined with internal/external damage behaviors such as STP deformation， degumming， wire mesh failure and crack propagation in the aging test， the influence law of the effect of thermal oxygen erosion on the seismic isolation performance of STP and the failure mechanism of isolation performance are expounded comprehensively. The experimental results show that the new STP structure system has good effects of isolation， limit and reset， and stable mechanical performance in the whole life cycle of building structure， and reliable isolation performance. On the basis of considering STP self-reset， it is recommended that its safe service life is 50 years. The research results are intended to provide a theoretical basis for the popularization and application of the new type of under-wall waste laminated tire isolation structure in high-intensity villages and towns.

Key words: waste scrap tire pads, aging-load coupling, isolation performance, failure mechanism, time-change law

CLC Number:

TU352.12

Guang-tai ZHANG,Jin-peng ZHANG,Ming-yang WANG,Dong-liang LU,Mei ZHANG. Seismic isolation performance of waste scrap tire pads under aging-loading coupling[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(1): 96-106.

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试件编号	温度/℃	试验时间/h	相当条件	试件组数
STP?25	100	77	20 ℃×25a	36
STP?50	100	154	20 ℃×50a	36
STP?75	100	231	20 ℃×75a	36
STP?100	100	308	20 ℃×100a	36

时间	γ=25%		γ=50%		γ=75%		γ=100%
/h	J	F	J	F	J	F	J	F
0	301.82	216.72	1565.45	820.54	3867.03	2219.75	6955.43	4607.02
77	306.58	221.14	1394.18	835.05	3751.97	2262.83	6761.05	4995.37
154	307.30	210.75	1508.76	873.76	3916.61	2341.58	6855.54	4642.43
231	300.97	213.86	1416.18	913.82	3377.56	2832.25	6083.09	5410.33
308	453.41	223.76	1726.02	921.32	3937.00	2734.79	6875.48	5746.43

Seismic isolation performance of waste scrap tire pads under aging-loading coupling

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