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连体结构加剧了结构在地震作用下的受力复杂性,属不规则结构。以上海虹桥综合交通枢纽为工程背景,介绍了弱连体结构抗震设计方法在工程中的应用,并基于LS-DYNA程序开发了用于结构弹塑性时程分析的梁柱纤维单元,通过构件数值滞回加载与试验结果的比较,验证了梁柱纤维单元的适用性。采用多质点层模型进行粘滞阻尼器参数优化分析,并采用整体结构弹塑性模型进行罕遇地震作用计算,评价阻尼器参数设计的合理性和弱连体结构的抗震性能。分析结果表明:该工程弱连接设计是可行的,结构满足抗震性能要求。
Siamese structure exacerbated the structural complexity of the force under earthquake action, is an irregular structure. Taking the Shanghai Hongqiao Integrated Transportation Hub as the engineering background, this paper introduces the application of weakly connected structure aseismic design method in engineering. Based on the LS-DYNA program, the beam-column fiber unit for structural elasto-plastic time-history analysis is developed. Hysteresis loading and test results compared to verify the applicability of the beam column fiber unit. The multi-particle point model was used to optimize the viscous damper parameters. The overall structure elastic-plastic model was used to calculate the rare earthquakes and to evaluate the rationality of the damper design and the seismic performance of the weakly connected structure. The analysis results show that the weak connection design of the project is feasible and the structure meets the requirements of seismic performance.