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| Seismic response analyses of a single-layer spherical lattice shell structure with a multifunctional FPB system |
| ZHUANG Peng1,2,3，JI Guangyu1，LIU Pei1，HAN Miao1,2,3 |
| 1.School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2.Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
3.Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
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Abstract This study proposed a new type of multifunctional friction pendulum bearing (MFPB) and examined its effectiveness in reducing and controlling seismic response of spherical lattice shell with surrounding columns.The MFPB consists of friction pendulum bearing (FPB), shape memory alloy (SMA) cables and sleeve restrainers.To investigate the mechanism of isolation and energy dissipation, the mechanical model of the new isolator were described.Furthermore, the hysteresis behavior of the MFPB was investigated with numerical simulations and the characteristics of such an isolation device were analyzed.Next, the MFPB devices were introduced in a single-layer spherical lattice shell structure with surrounding columns.An analytical model of the controlled structure was constructed through ABAQUS software.Finally, nonlinear time-history analyses were conducted to evaluate seismic performance of controlled and uncontrolled lattice shells using a set of dynamic response indices.The results show that the developed isolation system can effectively control structural responses under horizontal and vertical seismic excitations and possess the potential in disaster resistance under strong earthquakes, which assists high-position isolated spatial lattice shell structures in improving their comprehensive seismic behavior.
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Received: 09 October 2018
Published: 15 April 2020
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