（1 中国航空国际建设投资有限公司， 北京 100120； 2 清华大学土木工程安全与耐久教育部重点实验室， 北京 100084； 3 中国建筑标准设计研究院有限公司， 北京 100048)

［摘要］在PERFORM 3D软件中，建立了基于纤维模型理论、适用于钢筋混凝土(RC)框架-核心筒结构抗震性能评估的弹塑性分析模型，并给出了非线性模拟中所需要的钢筋及混凝土材料本构、连梁剪切铰变形性能等其他参数建议取值。完成了多个RC框架及剪力墙构件模型试验的模拟分析，表明建议模型对于分析RC结构基本构件具有较高的准确性，计算效率高。利用建立的分析方法，完成了根据中美抗震设计规范分别设计的两座相似的RC框架-核心筒高层结构的建模和系列抗震分析。结果表明：峰值荷载前两个方案的基底剪力-顶点位移曲线比较接近，美方设计方案结构的初始刚度略大，峰值荷载后二者有所差异；模型结构的屈服次序依次为连梁、框架梁、墙肢、框架柱，屈服次序合理，符合预期目标，美方设计方案连梁屈服较早；在罕遇地震作用下，美方设计方案结构x向的最大层间位移角约1/220，为中方设计方案的最大层间位移角的0-9倍；美方设计方案的连梁变形状态介于生命安全状态(LS)与防止倒塌状态(CP)之间，中方设计方案连梁没有超过生命安全状态(LS)；美方设计方案底部内筒外壁受拉侧墙肢弯矩沿层高分布略大于中方设计方案，两个方案底层墙肢边缘构件竖向钢筋的最大拉应变分布接近，均刚刚进入屈服水平。

［关键词］RC框架-核心筒结构； 弹塑性分析； 抗震性能； 性能点

中图分类号：TU375文献标识码：A文章编号：1002-848X(2020)07-0009-09

Elasto-plastic analysis model and typical example analysis of RC frame-corewall structure

HU Yu1, ZHAO Zuozhou2, QIAN Jiaru2, HAN Wenlong3

(1 China Aviation International Construction and Investment Co., Ltd., Beijing 100120, China; 2 Tsinghua University Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Beijing 100084, China; 3 China Institute of Building Standard Design Research, Beijing 100048, China)

Abstract:In PERFORM 3D software, an elasto-plastic analysis model based on fiber model theory was established suitable for seismic performance evaluation of reinforced concrete (RC) frame-corewall structures. The recommended values of the constitutive properties of the reinforced and concrete materials, the shear hinge deformation parameters of the coupling beams and other parameters were given. The simulation analysis of multiple RC frame and shear wall component model tests was completed, indicating that the proposed model had high accuracy and high calculation efficiency for the analysis of basic components of RC structure. Using the established analysis method, the elasto-plastic analysis modeling and series seismic analysis were conducted on the two similar RC frame-corewall high-rise building structures designed according to the China-US seismic design codes. The results show that the base shear force-top displacement curves of the two schemes before reaching peak load are relatively close, and the initial stiffness of the structure of the American design scheme is slightly larger. After the peak load, the two schemes are different. The yield sequence of the model structure is coupling beams, frame beams, wall limbs, and frame columns, which is reasonable and meets the expected goals. The coupling beam yields earlier in the American design scheme. Under the action of rare earthquakes, the maximum storey drift in the x direction of the American design scheme is about 1/220, which is 0-9 times that of the Chinese design scheme. The deformation state of the coupling beam in the American design scheme is between life safety state (LS) and the collapse prevention state (CP), and the coupling beam in the Chinese design scheme does not exceed the life safety state (LS). The bending moment distribution along the floor height of the lateral wall limbs of core tube of the American design scheme is slightly larger than that of the Chinese design scheme, and the maximum tensile strain distributions of the vertical reinforcement of the edge members of the bottom wall limbs of the two schemes are close, and the vertical reinforcements have just entered the yield level.

Keywords:RC frame-core wall structure; elasto-plastic analysis; seismic performance; performance point

作者简介：胡妤，硕士，工程师，Email:huyu@avic-aic.com。