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

摘要/Abstract

摘要：

为研究废旧叠层轮胎隔震垫（STP）在老化-荷载耦合下的隔震性能，选取几何尺寸为180 mm×180 mm×69 mm的6层STP，将其置于老化温度100 ℃、荷载5 MPa的条件下进行77 h、154 h、231 h、308 h的热空气加速老化试验。将完成加速劣化的叠层轮胎隔震垫进行墙下拟静力试验研究，深入分析老化时间、耦合荷载对墙下隔震结构下叠层轮胎隔震垫的滞回曲线、骨架曲线、水平等效刚度、等效阻尼比、残余位移、刚度退化的影响，结合试验中STP的变形、脱胶、钢丝网破坏及其裂缝延展等内、外部破损行为，综合阐明热氧侵蚀环境作用对STP隔震性能的影响规律及其隔震性能失效机理。试验研究结果表明，新型叠层轮胎隔震结构体系具有良好的隔震、限位和复位效果，在建筑结构全寿命周期内STP的力学性能稳定，具有可靠的隔震性能，同时在考虑STP自复位的基础上，建议其安全使用寿命为50年。研究成果以期为新型墙下废旧叠层轮胎隔震结构在高烈度村镇地区的推广应用提供理论基础。

关键词: 废旧叠层轮胎隔震垫, 老化?荷载耦合, 隔震性能, 失效机理, 时变规律

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

中图分类号:

TU352.12

张广泰,章金鹏,王明阳,陆东亮,张梅. 老化‒荷载耦合作用下废旧叠层轮胎隔震垫隔震性能[J]. 吉林大学学报(工学版), 2021, 51(1): 96-106.

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