三类三维隔震抗倾覆支座力学性能试验研究
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摘要
针对目前建筑三维隔震支座种类少以及不能抗倾覆的缺陷,开发了三类三维隔震抗倾覆支座(3D-BIORD)。基本思想是将水平隔震的子装置和竖向隔震的子装置串联起来,同时考虑了整套装置的抗倾覆要求。三类支座的区别在于采用不同的竖向隔震子装置,它们分别是环形弹簧支座、碟形弹簧支座和叠层厚橡胶支座。利用电液伺服压剪试验机对水平隔震子装置即抗拉橡胶支座(PRRB)进行压剪试验,利用电子式万能试验机对抗拉橡胶支座和竖向隔震子装置的竖向性能进行试验,结果表明水平隔震子装置在保证原有水平隔震支座性能的基础上,能达到预期的抗倾覆和限位要求,装置的竖向具有足够的承载力和适宜的刚度,弹簧类隔震子装置的性能基本不受加载频率的影响。
Three kinds of three-dimensional base isolation and overturn-resistance devices(3D-BIORD) were developed,in view of the limitation that there were less kind of structural three-dimensional base isolators and the existent bearings did not have the ability of overturn-resistance.The basic idea was that horizontal isolation sub-devices and vertical isolation sub-devices of these bearings were connected in series in the vertical direction,considering the demand of overturn-resistance of the whole device.The difference of three kinds of bearings were adopting different vertical isolation sub-devices,they were ring spring bearing,disk spring bearing and thick rubber bearing.Press-shear tests of horizontal isolation sub-devices,also called pull resistance rubber bearings(PRRB),were carried out using electro-hydraulic servo press-shear machine.Vertical property tests of PRRBs and vertical isolation sub-devices were performed using electronic universal testing machine.Test results showed that PRRBs had the anticipated capacities of overturn-resistance and displacement restriction,and did not change the primary properties;vertical isolation sub-devices had enough bearing capacity and proper stiffness.Loading frequency had no influence on properties of spring bearings.
Three kinds of three-dimensional base isolation and overturn-resistance devices(3D-BIORD) were developed,in view of the limitation that there were less kind of structural three-dimensional base isolators and the existent bearings did not have the ability of overturn-resistance.The basic idea was that horizontal isolation sub-devices and vertical isolation sub-devices of these bearings were connected in series in the vertical direction,considering the demand of overturn-resistance of the whole device.The difference of three kinds of bearings were adopting different vertical isolation sub-devices,they were ring spring bearing,disk spring bearing and thick rubber bearing.Press-shear tests of horizontal isolation sub-devices,also called pull resistance rubber bearings(PRRB),were carried out using electro-hydraulic servo press-shear machine.Vertical property tests of PRRBs and vertical isolation sub-devices were performed using electronic universal testing machine.Test results showed that PRRBs had the anticipated capacities of overturn-resistance and displacement restriction,and did not change the primary properties;vertical isolation sub-devices had enough bearing capacity and proper stiffness.Loading frequency had no influence on properties of spring bearings.
引文
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[2]吴香香,李宏男.竖向地震动对基础隔震结构高宽比限值的影响[J].同济大学学报,2004,32(1):10-14.
[3]祁皑,范宏伟.基于结构设计的基础隔震结构高宽比限值的研究[J].土木工程学报,2007,40(4):13-20.
[4]WANG Tieying,WANG Huanding,ZHANG Yongshan.Theheight-width ratio limited value for rubber bearing isolatedstructure computed by uniform design method[J].Journal ofHarbin Institute of Technology,2007,14(1):36-40.
[5]王铁英.橡胶垫隔震结构的抗倾覆研究[D].哈尔滨:哈尔滨工业大学,2004.
[6]张永山,王焕定,颜学渊.改进型三维隔震装置[P].中国:ZL200620064041.8,2006.
[7]张永山,王焕定,颜学渊.一种具有抗拉作用的叠层橡胶隔震支座[P].中国:ZL200620064042.2,2006.
[8]张永山,王焕定,颜学渊.新型三维隔震装置[P].中国:ZL200620064043.7,2006.
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