竖向地震作用下FPB对K8型单层球面网壳结构抗震性能的影响
|
摘要
摩擦摆支座(FPB)是一种有效的基础隔震设备,对摩擦摆支座进行精细化建模,并将其应用到K8型单层球面网壳结构中。首先,从结构顶点加速度和地震能量的输入两个方面分析竖向地震作用下摩擦摆支座对结构抗震性能的影响;其次,在不同地震动强度作用下,从结构的杆件动应力、节点加速度和节点竖向相对位移三个方面分析摩擦摆支座K8型单层球面网壳结构的抗震性能。分析结果表明:结构的顶点加速度明显减小;摩擦摆支座能够有效地隔离地震能量;不同地震动作用下应用摩擦摆支座单层球面网壳结构的抗震性能相近。
As an effective base isolation device, friction pendulum bearings(FPB) were finely modeled and applied in the K8 single-layer reticulated domes in this paper. First, influence of friction pendulum bearings was analyzed on the seismic performance of single-layer spherical reticulated shell from two aspects, the peak acceleration and earthquake energy. Moreover, the seismic performance of structure with FPB was studied under different ground motion intensities from three aspects, the dynamic stress, the nodal acceleration, and the vertical relative displacement of nodes. The result showed that the peak vertical acceleration was reduced and a part of earthquake energy was isolated by using FPBs. Under the different ground motion intensities, the seismic effect of a K8 single-layer spherical reticulated shell structure with FPB was similar.
As an effective base isolation device, friction pendulum bearings(FPB) were finely modeled and applied in the K8 single-layer reticulated domes in this paper. First, influence of friction pendulum bearings was analyzed on the seismic performance of single-layer spherical reticulated shell from two aspects, the peak acceleration and earthquake energy. Moreover, the seismic performance of structure with FPB was studied under different ground motion intensities from three aspects, the dynamic stress, the nodal acceleration, and the vertical relative displacement of nodes. The result showed that the peak vertical acceleration was reduced and a part of earthquake energy was isolated by using FPBs. Under the different ground motion intensities, the seismic effect of a K8 single-layer spherical reticulated shell structure with FPB was similar.
引文
[1]Zayas V,Low S,Mahin S.A simple pendulum technique for achieving seismic isolation[J].Earthquake Spectra,1990,6(2):317-333
[2]Earthquake Protection Systems(EPS).Technical characteristicsof f r i c t i o n p e n d u l u m b e a r i n g s[E B/O L].h t t p://w w w.Earthquakeprotection.com/Technical Characteristicsof FPBea rngs.Pdf
[3]Pranesh M,Sinha R.VFPI:an isolation device for aseismic design[J].Earthquake Engineering and Structure Dynamic,2000,29:603-627
[4]Tsai C S,Chen B J,Pong W S,et al.Interactive behavior of structures with multiple friction pendulum isolation system and unbounded foundations[J].Advances in Structural Engineering,2004,7(6):539-551
[5]Fenz D M,Constantinou M C.Spherical sliding isolation bearings with adaptive behavior:theory[J].Earthquake Engineering and Structural Dynamics,2008,37:163-183
[6]Tsai C S,Lu P C,Chen W S.Shaking table tests of a building isolated with a trench friction pendulum system[C]//Proceedings of the ASME Pressure Vessels and Piping Conference,Seismic Engineering.Canada,2006
[7]Constantinou M C,Mokha A,Reinhorn M A.Teflon bearings in base isolation II:modeling[J].Journal of Structural Engineering,1990,116(2):455-474
[8]Mokha A,Constantinou M C,Reinhorn M A,et al.Experimental study of friction-pendulum isolation system[J].Journal of Structural Engineering,1991,117(4):1201-1217
[9]Kim Y C,Xue S D,Zhuang P,et al.Seismic isolation analysis of FPS bearings in spatial lattice shell structures[J].Earthquake Engineering and Engineering Vibration,2010,9(1):93-102
[10]孔德文,孙梦涵,支旭东,等.应用摩擦摆支座的单层球面网壳地震相应分析[J].土木工程学报,2012,45(增1):158-162(Kong Dewen,Sun Menghan,Zhi Xudong,et al.Seismic response analysis of single layer lattice shell with FPS[J].China Civil Engineering Journal,2012,45(S1):158-162(in Chinese))
[11]龚健,周云,邓雪松.某摩擦摆隔震框架结构地震反应分析[J].土木工程学报,2012,45(增2):146-150(Gong Jian,Zhou Yun,Deng Xuesong.Seismic response analysis of a FPB isolated frame structure[J].China Civil Engineering Journal,2012,45(S2):146-150(in Chinese))
[2]Earthquake Protection Systems(EPS).Technical characteristicsof f r i c t i o n p e n d u l u m b e a r i n g s[E B/O L].h t t p://w w w.Earthquakeprotection.com/Technical Characteristicsof FPBea rngs.Pdf
[3]Pranesh M,Sinha R.VFPI:an isolation device for aseismic design[J].Earthquake Engineering and Structure Dynamic,2000,29:603-627
[4]Tsai C S,Chen B J,Pong W S,et al.Interactive behavior of structures with multiple friction pendulum isolation system and unbounded foundations[J].Advances in Structural Engineering,2004,7(6):539-551
[5]Fenz D M,Constantinou M C.Spherical sliding isolation bearings with adaptive behavior:theory[J].Earthquake Engineering and Structural Dynamics,2008,37:163-183
[6]Tsai C S,Lu P C,Chen W S.Shaking table tests of a building isolated with a trench friction pendulum system[C]//Proceedings of the ASME Pressure Vessels and Piping Conference,Seismic Engineering.Canada,2006
[7]Constantinou M C,Mokha A,Reinhorn M A.Teflon bearings in base isolation II:modeling[J].Journal of Structural Engineering,1990,116(2):455-474
[8]Mokha A,Constantinou M C,Reinhorn M A,et al.Experimental study of friction-pendulum isolation system[J].Journal of Structural Engineering,1991,117(4):1201-1217
[9]Kim Y C,Xue S D,Zhuang P,et al.Seismic isolation analysis of FPS bearings in spatial lattice shell structures[J].Earthquake Engineering and Engineering Vibration,2010,9(1):93-102
[10]孔德文,孙梦涵,支旭东,等.应用摩擦摆支座的单层球面网壳地震相应分析[J].土木工程学报,2012,45(增1):158-162(Kong Dewen,Sun Menghan,Zhi Xudong,et al.Seismic response analysis of single layer lattice shell with FPS[J].China Civil Engineering Journal,2012,45(S1):158-162(in Chinese))
[11]龚健,周云,邓雪松.某摩擦摆隔震框架结构地震反应分析[J].土木工程学报,2012,45(增2):146-150(Gong Jian,Zhou Yun,Deng Xuesong.Seismic response analysis of a FPB isolated frame structure[J].China Civil Engineering Journal,2012,45(S2):146-150(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心