随着高度和体量不断攀升，未来的超高层建筑将可能朝着集居住、工作和娱乐等多样化功能为一体的垂直城市发展，并产生水平交通的需求，其电梯系统也将向垂直和水平一体化的立体交通系统发展。当结构达到一定高度时，传统电梯系统将面临多分区和低效率等问题，严重影响超高层结构的发展。与传统电梯相比，磁悬浮多轿厢循环电梯和轨道交通式铰接细锁结构等新型电梯系统可以适用于各种建筑布局和结构形式，可灵活实现多轿厢竖向和水平运行，运载效率更高，所需空间更小。目前，超高层建筑大多采用框架-核心筒结构体系，该结构无法提供有效的水平交通通道，有可能不再是超高层建筑必要的结构形式。与之相比，分散筒结构或者多筒体巨型结构能同时提供竖向和水平交通通道，实现新型电梯系统的广泛应用，是未来超高层垂直城市的一种理想结构体系。本文以多简体巨型结构为基本研究对象，从简体剪力墙构件损伤模型、超高层结构建模方法及验证、多筒体巨型结构概念设计、抗震性能分析和结构损伤评估以及多简体巨型结构抗震设计参数分析等方向开展了研究。主要研究工作和成果如下： 1、提出了适用于钢筋混凝土剪力墙的损伤模型及其性能指标。针对多简体巨型结构的主要构件钢筋混凝土剪力墙，基于Park-Ang变形-能量双参数损伤模型，利用收集整理的国内外相关试验数据，提出了适用于钢筋混凝土剪力墙的修正损伤模型，并研究了钢筋混凝土剪力墙构件在基本运行、生命安全和防止倒塌三个性能水准下的损伤指标。 2、研究了内置钢板混凝土组合剪力墙的受力性能，提出了适用于该剪力墙的损伤模型及其性能指标。针对内置钢板混凝土组合剪力墙，采用有限元分析方法对其受力性能进行了详细地分析。根据规范相关内容，对模拟结果进行统计分析，提出了内置钢板混凝土组合剪力墙修正的抗剪承载力公式。随后，通过对有限元模拟结果进行回归分析，提出了内置钢板混凝土组合剪力墙屈服转角和极限转角的经验计算公式。最后，提出了适用于内置钢板混凝土组合剪力墙的修正Park-Ang损伤模型，并基于该模型研究了内置钢板混凝土组合剪力墙在基本运行、生命安全和防止倒塌三个性能水准下的损伤指标。 3、探讨了超高层结构的精细化建模方法和简化建模手段。以某超高层巨型支撑框架-核心筒结构为例，结合组合剪力墙有限元建模方法，基于通用有限元软件ABAQUS建立了该结构的精细有限元模型。与试验结果对比表明，该模型能较好地预测结构的基本动力特征。通过大震弹塑性时程分析结果表明，在设防大震下该模型的损伤分布与试验结果相符，进一步论证了该精细有限元模型的合理性。采用开源有限元程序OpenSEES，基于梁单元建立了该结构的简化模型，通过与精细有限元模型计算结果对比表明，该简化模型能较好地预测结构的动力特征以及弹性和弹塑性地震响应，并且可以极大程度缩短结构的弹塑性分析耗时。 4、对多筒体巨型结构进行了概念设计及抗震性能分析，并基于本文提出的剪力墙损伤模型，研究了该结构在地震作用下的损伤发展规律。以本文所选巨型支撑框架-核心筒结构为原型结构，将中央简体不断外移形成不同的分散筒结构，基于简化模型研究了该过程中结构的性能演化特征。在此基础上，对多筒体巨型结构进行了初步概念设计，建立了相应的精细有限元模型，对其进行不同烈度下的大震弹塑性时程分析。结果表明该多筒体巨型结构刚度较原型结构大，地震作用下的位移响应更小，罕遇地震层间位移角满足规范要求，各构件在设防烈度大震下满足预期性能目标。最后，基于梁单元建立了多筒体巨型结构简化模型，对其进行了增量动力分析，并采用本文修正的剪力墙损伤模型计算了该结构地震作用下的筒体损伤分布。结果发现， 5、讨论了多筒体巨型结构主要结构及构件参数对其动力特征和地震响应的影响。基于弯剪耦合连续化模型，提出了折减的几何平均加速度谱值地震动强度指标，建立了结构最大弹性层间位移角与该地震动强度指标之间的关系。将多筒体巨型结构简化模型的结构及构件参数进行连续化处理，根据参数分析结果确定了结构宏观参数与构件主要参数的关系，研究了结构及构件主要参数对多简体巨型结构基本动力特征和地震响应的影响。最后，提出了多简体巨型结构初步抗震设计的基本思路。 最后，对于下一步研究工作作出了展望。 关键词：磁悬浮多轿厢循环电梯；铰接细锁结构；多筒体巨型结构；损伤模型；性能水准；RC剪力墙；内置钢板混凝土组合剪力墙；弯剪耦合连续化模型；地震动强度指标；抗震设计

 Future tall building tends to become a vertical city that can provide living, working and entertainment places for citizens, as its height and dimensions develops. Thus, horizontal transportation will be needed and combined with vertical transportation to form a three-dimensional elevator system for super tall buildings. Traditional elevator system is faced with several problems like more partitions and higher occupation when buildings get higher, which will impede the development of tall buildings. Innovative elevator systems like maglev multi-car elevator and articulated fiiniculator, which allows multi cars to run both vertically and horizontally, can be adopted to various architectural layouts and structural systems. They are more efficient in transporting and occupation. Frame-core structure is currently the most commonly used structural system in super tall buildings. As elevator technology develops, tubed core which is unable to provide efficient horizontal traffic channels will no longer be necessary for super tall buildings. Alternatively, Dispersive tube structure and tubed mega frame structure can be efficient for future vertical cities, since they can provide both vertical and horizontal traffic channels for elevator system. Tubed mega frame structure is the main obeject of this paper. The paper is mainly focused on the damage model of the main members of tubed mage frame structure, the refined and simplified finite element modelling approach of super tall buildings, the conceptional design and seismic assessment of tubed mega frame structures, the damage assessment based on the proposed damage models of members and parametric studies on its seismic design. The main achievements of this paper are summarized as follows. 1.The damage model and corresponding performance levels were proposed for RC shear wall. The damage model of RC shear wall which is the main member of tubed mega frame structure was investigated based on Park-Ang damage model. A modified formula was proposed by analyzing the test results from related researches. Then, three performance levels for RC shear wall, that are immediate occupancy, life safety and collapse prevention, were established, as well as the corresponding damage indeses. 2.The cyclic behavior of steel plate reinforced concrete (SPRC) shear wall was investigated. The damage model and corresponding performance levels were proposed for the SPRC shear wall. A nonlinear 3-D finite element model in ABAQUS was developed and validated against published experiment results. Then, a parametric study was conducted to evaluate the effects of the parameters on cyclic behavior of composite shear wall. Furthermore, shear strengths obtained from finite element models were used to propose a modified formula of shear strength, based on the corresponding Chinese code. Another parametric study was performed to propose a formula of the yield rotation and ultimate rotation of SPRC shear wall. Finally, a modified Park-Ang damage model for SPRC shear wall was obtained. Based on the proposed damage model, three performance levels for SPRC shear wall, that are immediate occupancy, life safety and collapse prevention, were established, as well as the corresponding damage indeses. 3.The refined and simplified finite element modelling approach were discussed. A refined finite element model of a super tall mega braced frame-tube core structure was built in ABAQUS. The modelling methods of structural members were validated against experimental results. The eslato-plastic analysis of the finite element model under rare earthquakes were performed. The results were compared with test results. It was found that the proposed refined FEM can well predicts the fundamental vibration characteristics and the damage distribution of the structure under rare earthquakes. Based on flexural beam and shear beam, a simplified model of the frame-core tube structure was built and analyzed in OpenSEES. The static and transient results were compared with that of the fine finite element model. The results show that the simplified model can well represent the fundamental vibration characteristics, displacement and force behavior of the structure. 4.The conceptional design, seismic assessment of a tubed mega frame structure was conducted. Based on the proposed damage models for shear walls, the damage evolution of the tubed structure were studies. The finite element model of the conceptional structure was built and analyzed under rare earthquakes. The results indicate that the tubed mega frame structure is stiffer than the original frame-core structure and yielded a smaller displacement behavior under earthquakes. All members achieved the performance objects under rare earthquake, which present a proper seismic performance of the tubed mega frame structure. The simplified model of the tubed mega frame structure was built in OpenSEES based on flexural beam. The IDA analysis was performed. The proposed damage models were applied to obtain the damage indices of the tube under different earthquakes. The results indicate that the flexural behavior of the structure increases the axial load of the tubes, which will probably result in more developed damage state of the tubes. Performance objects of the tubed mega frame structure are suggested to be stricter. 5.The influence of the main parameters of the tubed mega frame structure and its members on its vibration characteristics and seismic behavior were discussed. A modified ground motion intensity index was proposed. Based on a continuum MDOF model, the prediction of the maximum inter-story drift ratio of structures was established based on the proposed index. A parametric study of a continuum simplified model of tubed mega frame structure was carried out to obtain the relation between the macroscopic parameters of the structure and the parameters of the members. Finally, a conceptioal seismic design method of the tubed mega frame structure was proposed. Finally, further studies that can be conducted were discussed. Key words: maglev multi-car elevator; articulated funiculator; tubed mega frame structure; damage model; RC shear wall; steel plate reinforced concrete composite shear wall; continuum MDOF model; ground motion intensity index; seismic design.