带斜柱转换的高层建筑结构弹塑性地震反应分析
发布时间：2018-07-15 09:57
【摘要】：斜柱转换结构是近年较新出现的一种转换结构形式，斜柱转换传力简单直接，能更加有效地利用建筑空间，增强结构的受力性能，控制工程成本，有广泛的应用前景。但目前尚未见到关于带斜柱转换结构弹塑性地震反应分析的相关成果。 钢筋混凝土结构的弹塑性性能一直是结构研究中最重要的课题之一，纤维单元模型是目前钢筋混凝土框架结构弹塑性分析中最为细化并接近实际结构受力性能的数值分析模型，应用范围较广。纤维单元模型的理论与材料的本构关系密切，计算模拟分析的准确性很大程度上取决于材料模型的合理性。考虑横向钢筋与纵筋对核心混凝土共同约束作用，，Mander约束混凝土本构模型在工程实践中得到很好的应用。但Mander模型的约束混凝土抗压强度计算较为繁琐，在实际应用中往往未能完全显示出其对约束混凝土性能提高的意义。 本研究的主要创新性工作包括以下三部分内容： （1）对带斜柱转换的江门某酒店建筑结构的1:35缩尺模型进行地震模拟振动台试验，并对试验结果进行系统的分析和研究，了解该结构在地震作用下的基本性能。试验结果揭示出结构设计中存在的不足。 （2）在对钢筋混凝土约束本构模型重新梳理的基础上，提出一种考虑非对称箍筋约束矩形混凝土构件的Mander本构模型的计算方法：分别计算两向等效等轴围压，通过求幂平均值等方法考虑两向围压不同的情况。将此方法运用于Mander约束混凝土本构计算中，省去了繁琐的查表步骤，并可得到较为准确可靠的约束混凝土抗压强度。本研究还将此方法运用于实际工程，对带斜柱转换的高层建筑结构弹塑性地震反应分析，分析结果基本与地震模拟振动台试验结果相符。 （3）基于地震模拟振动台试验结果及数值模拟结果的对比和分析，对研究对象原结构的塔楼和斜柱转换结构部分分别进行优化。针对塔楼部分在水平地震作用下扭转效应较大的问题通过增加防屈曲约束支撑对其进行优化；针对斜柱转换结构中斜柱倾角较小、长度较长、截面较大、设计偏于保守的问题提出一种适用于该类型斜柱转换结构的斜柱倾斜角和钢管混凝土截面优化的计算方法。并对优化后的结构模型进行弹塑性地震反应分析，验证了优化设计的可行性和有效性。
[Abstract]:Oblique column transfer structure is a new type of conversion structure in recent years. The transfer force of inclined column is simple and direct, which can make more effective use of building space, enhance the mechanical performance of the structure, control the engineering cost, and have a wide application prospect. However, there is no relevant result of elastic-plastic seismic response analysis of inclined column transfer structure. The elastoplastic behavior of reinforced concrete structures has been one of the most important topics in the structural research. Fiber element model is the most detailed numerical analysis model in the elastoplastic analysis of reinforced concrete frame structures, which is close to the actual structural mechanical properties. It has a wide range of applications. The theory of fiber unit model is closely related to the constitutive relation of material, and the accuracy of calculation and simulation depends on the rationality of material model to a great extent. The Mander confined concrete constitutive model is well applied in engineering practice considering the joint restraint of transverse and longitudinal bars on core concrete. However, the calculation of compressive strength of confined concrete based on Mander model is rather complicated, and its significance to the improvement of confined concrete performance is often not fully demonstrated in practical application. The main innovative work of this study includes the following three parts: (1) the seismic simulation shaking table test is carried out on the 1:35 scale model of a hotel building structure in Jiangmen with inclined column conversion. The experimental results are systematically analyzed and studied to understand the basic performance of the structure under seismic action. The experimental results reveal the shortcomings in structural design. (2) on the basis of recombing the reinforced concrete restrained constitutive model, A calculation method of Mander constitutive model for rectangular concrete members with asymmetric stirrups is presented. The method is applied to the constitutive calculation of Mander confined concrete, and the complicated table checking step is eliminated, and the compressive strength of confined concrete can be obtained more accurately and reliably. This method is also applied to practical engineering to analyze the elastoplastic seismic response of tall building structures with inclined column conversion. The results are basically consistent with the results of shaking table test. (3) based on the comparison and analysis of the results of shaking table test and numerical simulation, The original tower and oblique column transfer structure were optimized respectively. In order to solve the problem that the torsional effect of tower is larger under horizontal earthquake, the inclined angle of inclined column is smaller, the length of inclined column is longer and the section is larger, which is optimized by adding buckling restrained bracing, and the inclined angle of inclined column is smaller, the length of inclined column is longer, and the section is larger. This paper presents a method for calculating the slope angle of inclined column and section optimization of concrete filled steel tube (CFST), which is suitable for this type of inclined column transfer structure. The elastoplastic seismic response analysis of the optimized structural model verifies the feasibility and effectiveness of the optimized design.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.212
[Abstract]:Oblique column transfer structure is a new type of conversion structure in recent years. The transfer force of inclined column is simple and direct, which can make more effective use of building space, enhance the mechanical performance of the structure, control the engineering cost, and have a wide application prospect. However, there is no relevant result of elastic-plastic seismic response analysis of inclined column transfer structure. The elastoplastic behavior of reinforced concrete structures has been one of the most important topics in the structural research. Fiber element model is the most detailed numerical analysis model in the elastoplastic analysis of reinforced concrete frame structures, which is close to the actual structural mechanical properties. It has a wide range of applications. The theory of fiber unit model is closely related to the constitutive relation of material, and the accuracy of calculation and simulation depends on the rationality of material model to a great extent. The Mander confined concrete constitutive model is well applied in engineering practice considering the joint restraint of transverse and longitudinal bars on core concrete. However, the calculation of compressive strength of confined concrete based on Mander model is rather complicated, and its significance to the improvement of confined concrete performance is often not fully demonstrated in practical application. The main innovative work of this study includes the following three parts: (1) the seismic simulation shaking table test is carried out on the 1:35 scale model of a hotel building structure in Jiangmen with inclined column conversion. The experimental results are systematically analyzed and studied to understand the basic performance of the structure under seismic action. The experimental results reveal the shortcomings in structural design. (2) on the basis of recombing the reinforced concrete restrained constitutive model, A calculation method of Mander constitutive model for rectangular concrete members with asymmetric stirrups is presented. The method is applied to the constitutive calculation of Mander confined concrete, and the complicated table checking step is eliminated, and the compressive strength of confined concrete can be obtained more accurately and reliably. This method is also applied to practical engineering to analyze the elastoplastic seismic response of tall building structures with inclined column conversion. The results are basically consistent with the results of shaking table test. (3) based on the comparison and analysis of the results of shaking table test and numerical simulation, The original tower and oblique column transfer structure were optimized respectively. In order to solve the problem that the torsional effect of tower is larger under horizontal earthquake, the inclined angle of inclined column is smaller, the length of inclined column is longer and the section is larger, which is optimized by adding buckling restrained bracing, and the inclined angle of inclined column is smaller, the length of inclined column is longer, and the section is larger. This paper presents a method for calculating the slope angle of inclined column and section optimization of concrete filled steel tube (CFST), which is suitable for this type of inclined column transfer structure. The elastoplastic seismic response analysis of the optimized structural model verifies the feasibility and effectiveness of the optimized design.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.212
【参考文献】
相关期刊论文 前10条
1 李兵,李宏男;钢筋混凝土剪力墙弹塑性分析方法[J];地震工程与工程振动;2004年01期
2 蒋通，宋亚新，楼梦麟;高层框-剪结构空间协同弹塑性地震反应分析[J];地震工程与工程振动;1998年02期
3 谢礼立,翟长海;最不利设计地震动研究[J];地震学报;2003年03期
4 孙景江;Tetsuro Ono;赵衍刚;王威;;Lateral load pattern in pushover analysis[J];Earthquake Engineering and Engineering Vibration;2003年01期
5 汪梦甫,沈蒲生;钢筋混凝土框剪结构非线性地震反应分析[J];工程力学;1999年04期
6 杜修力;结构弹塑性地震反应现状评述[J];工程力学;1994年02期
7 娄宇,丁大钧,魏琏;高层建筑中转换层结构的应用和发展[J];建筑结构;1997年01期
8 张强;周德源;伍永飞;邹
本文编号：2123695
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2123695.html
