某超限复杂结构基于性能的抗震设计分析
发布时间：2018-11-14 13:23
【摘要】：城市现代化催生了越来越多的超高层建筑以及平面、立面特别复杂的建筑,“三水准,两阶段”的常规设计方法已经不能充分满足这些建筑结构性能和安全设计要求,我们称这些高度和复杂程度超出规范规定限值的建筑结构为超限结构。结构超限可能会产生应力集中,扭转效应剧烈,地震作用下整体稳定性和抗倾覆力降低等问题,对结构抗震性能极其不利。我国抗震规范所提出的“三水准,两阶段”的结构抗震设计方法只是在一定程度上考虑了某些基于性能的抗震设计思想,以往对于一些复杂结构和超高结构的设计往往只是建立在定性分析和概念设计的基础上,如何基于性能要求和目标,探究合适的抗震分析设计方法,对超限复杂结构进行抗震分析,保证实现结构性能的可能性正是本文的研究目的。本文通过总结超限不规则结构的发展概况,阐述了超限复杂工程探讨了基于性能的抗震设计(PBSD)的基本原理和研究方法,并结合一个典型的超限复杂工程实例,介绍了超限结构判别方法,基于本工程的性能目标,讨论了本工程基于性能的抗震设计方法,进而量化抗震性能分析结果,针对分析结果,采取相应的超限对策,为以后将基于性能的设计思想运用到其他超限复杂结构中提供理论和实践探索。论文的主要工作可概括如下：(1)首先对超限复杂结构做了初步设计,并进行了大悬挑部分楼板的舒适度分析。由于结构在不同地震强度等级下的反应是一种连续变化的过程,弹性和塑性变形也仅是相对的,在此假定结构在小震下几乎完全处于弹性状态,而在中震下结构整体处于弹性阶段,但初步向部分塑形过度,所以将小震抗震性能分析包含在中震分析中,制定了中震、大震作用下的性能目标。(2)其次,对比进行SATWE程序与MIDAS程序对超限复杂结构在设防地震下的弹性设计分析,整体把握超限结构在中震下的抗震性能,并补充设防地震下的弹性时程分析。按照中震可修原则,重点验算了主抗侧力构件(剪力墙抗剪验算和楼板应力分析),同时对超限的关键部位做相应的包络验算分析,以实现中震下结构能达到预定的性能目标。(3)最后考察大震作用下,利用Push-over程序对超限复杂结构进行静力弹塑性分析,分析找出结构薄弱部位或薄弱层,评估结构罕遇地震下抗倒塌能力,基于提前预定的性能目标,分析验证本工程在大震作用下能否满足抗震要求。
[Abstract]:Urban modernization has given birth to more and more super-tall buildings and planes, especially complex facades. The conventional design methods of "three levels and two stages" can no longer fully meet the structural performance and safety design requirements of these buildings. We call these building structures whose height and complexity exceed the limits specified in the code. The problems of stress concentration, severe torsion effect and the reduction of overall stability and anti-capsizing force under earthquake will be extremely disadvantageous to the seismic performance of the structure. The "three-level, two-stage" seismic design method proposed in the seismic code of our country only considers some performance-based seismic design ideas to a certain extent. In the past, the design of some complex structures and super-high structures was usually based on qualitative analysis and conceptual design, how to explore the appropriate seismic analysis design method based on the performance requirements and objectives. The purpose of this paper is to make seismic analysis of complex structures beyond the limit to ensure the possibility of achieving structural performance. In this paper, the basic principle and research method of performance-based seismic design (PBSD) are discussed by summing up the general situation of the development of over-limit irregular structures, and combining with a typical example of over-limit complex engineering. Based on the performance objectives of the project, this paper discusses the performance-based seismic design method of the project, and then quantifies the results of the seismic performance analysis. According to the analysis results, the corresponding over-limit countermeasures are adopted. It provides a theoretical and practical exploration for the application of performance-based design to other complex structures. The main work of this paper can be summarized as follows: (1) the initial design of the overrun complex structure is made, and the comfort analysis of the large cantilever part of the floor is carried out. Because the response of the structure under different earthquake intensity levels is a continuous process, elastic and plastic deformation are only relative. It is assumed that the structure is almost completely elastic under the small earthquake. But the whole structure under moderate earthquake is in the elastic stage, but the initial shape is over, so the seismic performance analysis of small earthquake is included in the analysis of medium earthquake, and the performance target under the action of medium earthquake and large earthquake is established. (2) secondly, This paper compares the elastic design analysis of complex structures with SATWE program and MIDAS program under seismic fortification, grasps the seismic behavior of over-limited structures under moderate earthquake as a whole, and complements the elastic time-history analysis of seismic fortification. According to the repairable principle of moderate earthquake, the main anti-lateral force components (shear wall shear resistance and floor stress analysis) are mainly checked and analyzed. In order to achieve the performance target of the structure under moderate earthquake. (3) finally, under the action of strong earthquake, the static elastic-plastic analysis of the overrun complex structure is carried out by using Push-over program, and the weak position or the weak layer of the structure is found out. In order to evaluate the anti-collapse ability of structures under rare earthquakes, based on the predefined performance objectives, this paper analyzes and verifies whether the project can meet the seismic requirements under the action of large earthquakes.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.11
本文编号：2331273
[Abstract]:Urban modernization has given birth to more and more super-tall buildings and planes, especially complex facades. The conventional design methods of "three levels and two stages" can no longer fully meet the structural performance and safety design requirements of these buildings. We call these building structures whose height and complexity exceed the limits specified in the code. The problems of stress concentration, severe torsion effect and the reduction of overall stability and anti-capsizing force under earthquake will be extremely disadvantageous to the seismic performance of the structure. The "three-level, two-stage" seismic design method proposed in the seismic code of our country only considers some performance-based seismic design ideas to a certain extent. In the past, the design of some complex structures and super-high structures was usually based on qualitative analysis and conceptual design, how to explore the appropriate seismic analysis design method based on the performance requirements and objectives. The purpose of this paper is to make seismic analysis of complex structures beyond the limit to ensure the possibility of achieving structural performance. In this paper, the basic principle and research method of performance-based seismic design (PBSD) are discussed by summing up the general situation of the development of over-limit irregular structures, and combining with a typical example of over-limit complex engineering. Based on the performance objectives of the project, this paper discusses the performance-based seismic design method of the project, and then quantifies the results of the seismic performance analysis. According to the analysis results, the corresponding over-limit countermeasures are adopted. It provides a theoretical and practical exploration for the application of performance-based design to other complex structures. The main work of this paper can be summarized as follows: (1) the initial design of the overrun complex structure is made, and the comfort analysis of the large cantilever part of the floor is carried out. Because the response of the structure under different earthquake intensity levels is a continuous process, elastic and plastic deformation are only relative. It is assumed that the structure is almost completely elastic under the small earthquake. But the whole structure under moderate earthquake is in the elastic stage, but the initial shape is over, so the seismic performance analysis of small earthquake is included in the analysis of medium earthquake, and the performance target under the action of medium earthquake and large earthquake is established. (2) secondly, This paper compares the elastic design analysis of complex structures with SATWE program and MIDAS program under seismic fortification, grasps the seismic behavior of over-limited structures under moderate earthquake as a whole, and complements the elastic time-history analysis of seismic fortification. According to the repairable principle of moderate earthquake, the main anti-lateral force components (shear wall shear resistance and floor stress analysis) are mainly checked and analyzed. In order to achieve the performance target of the structure under moderate earthquake. (3) finally, under the action of strong earthquake, the static elastic-plastic analysis of the overrun complex structure is carried out by using Push-over program, and the weak position or the weak layer of the structure is found out. In order to evaluate the anti-collapse ability of structures under rare earthquakes, based on the predefined performance objectives, this paper analyzes and verifies whether the project can meet the seismic requirements under the action of large earthquakes.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.11
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