We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
地铁上盖多塔楼隔震结构抗震性能研究.
- Authors
袁涛涛
- Abstract
Considering the adverse effect of the sudden change of the stiffness of the transfer floor on the seismic response of the structure, the seismic performance of the multi tower structure above the Junma Village Parking Lot of Xi'an Metro Line 14 is analyzed by using the interlayer isolation technology. By establishing the finite element models of integral and single tower structures, the structural vibration characteristics, vibration reduction and isolation performance, response of isolation bearings, elastic-plastic performance and damage characteristics under rare earthquakes are comprehensively analyzed. The divisional design method in Code for Seismic Design of Buildings (GB50011—2010) and the direct design method in Standard for Seismic Isolation Design of Building (GB / T51408—2021) are compared and analyzed. The calculation results show that the structural period is significantly prolonged and the isolation effect is remarkable. Under the action of rare earthquake, the stress, deformation and elastic-plastic interlayer displacement angle of the isolation bearing meet the requirements of relevant codes, and most structural members are basically intact, indicating that the isolation structure is safe and reliable under the action of rare earthquake. The base shear of the upper tower obtained by the direct design method is 1. 74~1. 95 times that of the divisional design method. The seismic force obtained by subsection design method is distributed in inverted triangle, while the seismic force of the upper tower obtained by direct design method is distributed more evenly along the floor height, which is more in line with the stress state of the isolation structure. The isolated structure under the action of extremely rare earthquake meets the fortification objectives of relevant codes.
- Subjects
XI'AN Shi (China); TOWERS; SEISMIC response; EARTHQUAKE resistant design; STRUCTURAL dynamics; FINITE element method; VIBRATION isolation
- Publication
Railway Standard Design, 2022, Vol 66, Issue 7, p137
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202104130002