CCTV新台址主楼SRC柱抗震计算模型的建立  

Modeling for seismic analysis of SRC columns in New CCTV Building

作　　者：郭彦林[1] 霍轶力[1] 盛和太[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《建筑结构学报》2008年第3期54-62,共9页Journal of Building Structures

摘　　要：本文针对中央电视台(CCTV)新台址主楼外筒中采用的SRC柱,提出了基于SAP2000程序、用于抗震承载力分析的模型。结合已有研究成果,分析了CCTV主楼中高含钢率的SRC柱的承载特性。应用有限单元法和截面纤维单元分析方法,确定了SRC柱的初始屈服面和屈服后的基本承载性能,建立了基于塑性铰单元的弹塑性计算模型。在此基础上,根据已有试验结果,应用P ivot滞回模型模拟了SRC柱的滞回性能,建立了基于连接单元的计算模型。通过单调加载和往复加载的算例分析,校核了两种模型的准确性;结合塑性铰、连接单元计算模型的原理,分析了两种模型的适用性。本文提出的计算模型,能够在结构计算中高效、准确地模拟SRC柱的抗震承载特性。This paper presented the load-carrying performance of the SRC （steel reinforced concrete） columns in New CCTV Building, and established the SRC model for seismic analysis on the basis of available functions of FEA software SAP2000. In this paper, the load-carrying capability of the high steel ratio SRC columns in New CCTV Building was investigated after summarizing the existing research results. And further the yield surface and basic post-yielding characteristic of the SRC columns were obtained and plastic hinge element based on elasto-plastic model was established for anti-seismic analysis. With this understanding and conclusions derived from current experiments, the present study employed Pivot Hysteresis Model to stimulate the hysteretic behavior of the SRC columns and seted up NLink element based model. Furthermore, some verification examples were carried out and they demonstrate accuracy of the two models. Discussion on applicability of the two models was made and it indicated the models, which were proposed in this paper, can efficiently and accurately stimulate the anti-seismic load-carrying performance of the SRC columns in FEM analysis.

关 键 词：CCTV主楼 SRC柱 计算模型 塑性铰 连接单元 Pivot滞回规则 

分 类 号：TU375.302[建筑科学—结构工程] TU311.4