摘要
为进一步明晰叠层轮胎隔震垫(STP)在纯压状态下的破坏行为,提出了更为精确的轴压破坏准则。选取180 mm×180 mm的方形6层STP,对其进行竖向极限性能试验,分析其在二次加载后的承载力变化、外观破坏及钢丝网分布变化情况。试验结果表明:STP受压时钢丝网断裂情况与其承载力变化关系密切,二次加载时,STP荷载-位移曲线出现拐点的主要原因是钢丝网达到极限拉应力而局部断裂。在结合叠层橡胶隔震支座的破坏准则的基础上,建议将STP内部钢丝网断裂情况作为其轴压破坏失效的判定指标。同时,为了保证设计及使用安全,选取钢丝网断裂时荷载-位移曲线的最小荷载作为STP的极限承载力。
In order to further clarify the failure behavior of scrap tire pads( STP) under pure pressure state,a more accurate criterion of axial compressive failure was proposed. The horizontal 6-layer STP of 180 mm × 180 mm was selected and tested for vertical limit performance. The change of bearing capacity,appearance damage and distribution of steel mesh after two loadings were analyzed. The results show that the fracture condition of steel mesh is closely related to the change of bearing capacity under pressure. The main reason for the inflection point of the STP load-displacement curve during secondary loading is that the steel wire net reaches the ultimate tensile stress and is partially fractured. On the basis of the failure of laminated rubber bearings,it is recommended that the fracture of STP internal steel wire mesh can be used as the determination index of the axial compressive failure. The minimum load of the load-displacement curve when the steel wire mesh is broken is selected as as the ultimate bearing capacity of STP in order to ensure the safety of design and use.
作者
陆东亮
张广泰
魏飞来
才增霞
张梦
LU Dongliang;ZHANG Guangtai;WEI Feilai;CAI Zengxia;ZHANG Meng(School of Architecture & Engineering,Xinjiang University,Urumqi 830047,China)
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2019年第2期70-75,109,共7页
Journal of Henan University of Science And Technology:Natural Science
基金
国家自然科学基金项目(201504101182)
关键词
叠层轮胎隔震垫
钢丝网
极限承载力
破坏准则
scrap tire rubber pads
steel wire net
ultimate bearing capacity
failure criterion
