钢管混凝土核心柱组合桥墩抗震性能研究
发布时间：2018-12-16 11:05
【摘要】：国内外已发生的多次大地震中,桥梁结构震害现象均十分普遍和严重,作为生命线工程的枢纽部分,桥梁震害不仅会造成巨大的直接经济损失,而且因其破坏导致的交通中断会严重阻碍抗震救灾和灾后重建工作。因此,研究桥梁抗震性能指导桥梁抗震设计十分必要。梁式桥具有经济指标高、施工周期短等优点,是桥梁建设中最常采用的桥型,同时也是地震中受损最严重的桥型。决定梁式桥抗震性能的关键构件是桥墩,严重的墩柱震害是引起落梁、倒塌,并在震后难以修复使用的主要原因。因此,如何提高桥墩抗震性能是研究桥梁抗震的关键问题之一。在不断研究和创新的基础上,大连理工大学邱文亮教授首次提出了钢管混凝上核心柱组合桥墩,这种新型桥墩是将钢管混凝土作为核心柱埋置于普通钢筋混凝土桥墩内,使桥墩的抗震性能得以大幅提升。已有的工程实践主要集中在将钢管混凝土核心组合柱应用于高层建筑领域,相关的研究成果侧重于组合柱在静态荷载作用下的轴压性能方面。而桥梁结构有着与前者截然不同的结构体系、荷载类型和传力机制,组合柱作为桥墩构件必定有其不同的性能特点,而相关的研究成果却不多见。本论文的研究目的是深入地了解和把握钢管混凝上核心柱组合桥墩的抗震性能,论文的主要工作及成果如下：(1)调研国内外关于如何提高桥墩抗震性能的研究成果,并提出将钢管混凝土核心柱应用于普通桥墩以改善梁式桥的抗震性能；(2)进行了组合墩柱七因素(轴压比、配箍率、纵筋率、钢管直径和长度、混凝上强度和剪跨比)拟静力对比试验,详细描述了试验方案设计、试验过程及模型试件损伤发展情况；(3)对试验数据进行分析处理,评估上述各因素的变化对组合墩柱的延性、强度、耗能和残余位移等抗震性能指标的影响；(4)基于数值分析软件OpenSees平台,建立纤维单元模型,对拟静力试验过程进行数值模拟,并将数值结果与试验数据对比分析；(5)通过对大量数据进行回归分析,提出了钢管混凝土核心柱组合桥墩的等效屈服弯矩的实用计算公式,可为该类桥墩的抗震设计提供有益参考。
[Abstract]:In many large earthquakes at home and abroad, the earthquake damage of bridge structure is very common and serious. As a pivotal part of lifeline engineering, bridge earthquake damage will not only cause huge direct economic losses. Traffic disruptions caused by the damage could seriously hamper disaster relief and reconstruction efforts. Therefore, it is necessary to study the seismic performance of the bridge to guide the seismic design of the bridge. Beam bridge has the advantages of high economic index, short construction period and so on. It is the most commonly used bridge type in bridge construction, and it is also the most seriously damaged bridge type in earthquake. The key component to determine the seismic performance of beam bridges is the pier, and the severe damage to the pier column is the main reason for the fall and collapse of the beam, and it is difficult to repair and use after the earthquake. Therefore, how to improve the seismic performance of bridge piers is one of the key problems in bridge seismic research. On the basis of continuous research and innovation, Professor Qiu Wenliang of Dalian University of Science and Technology put forward for the first time a new type of concrete filled steel tube (CFST) bridge pier with concrete filled steel tube (CFST) as the core column in ordinary reinforced concrete (RC) pier. The seismic performance of piers can be greatly improved. The existing engineering practice mainly focuses on the application of CFST core composite columns in the field of high-rise buildings, and the related research results focus on the axial compression behavior of composite columns under static load. The bridge structure has different structure system, load type and force transfer mechanism. Composite column as a member of pier must have its different performance characteristics, but the related research results are rare. The purpose of this paper is to deeply understand and grasp the seismic behavior of composite piers with core columns on concrete-filled steel pipe. The main work and results are as follows: (1) the research results of how to improve the seismic performance of piers at home and abroad are investigated. The concrete filled steel tube core column is applied to the common pier to improve the seismic performance of the beam bridge. (2) Quasi-static comparative tests of seven factors (axial compression ratio, hoop ratio, longitudinal reinforcement ratio, diameter and length of steel tube, strength on coagulation and shear span ratio) of combined pier column are carried out, and the design of test scheme is described in detail. Test process and damage development of model specimen; (3) analyze and deal with the test data, and evaluate the influence of the above factors on the seismic performance of the composite pier column, such as ductility, strength, energy dissipation and residual displacement. (4) based on the numerical analysis software OpenSees, the fiber unit model is established, and the numerical simulation of the pseudo-static test process is carried out, and the numerical results are compared with the experimental data. (5) based on the regression analysis of a large number of data, a practical formula for calculating equivalent yield moment of concrete filled steel tube (CFST) core column composite pier is put forward, which can provide a useful reference for the seismic design of this kind of pier.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55
本文编号：2382233
[Abstract]:In many large earthquakes at home and abroad, the earthquake damage of bridge structure is very common and serious. As a pivotal part of lifeline engineering, bridge earthquake damage will not only cause huge direct economic losses. Traffic disruptions caused by the damage could seriously hamper disaster relief and reconstruction efforts. Therefore, it is necessary to study the seismic performance of the bridge to guide the seismic design of the bridge. Beam bridge has the advantages of high economic index, short construction period and so on. It is the most commonly used bridge type in bridge construction, and it is also the most seriously damaged bridge type in earthquake. The key component to determine the seismic performance of beam bridges is the pier, and the severe damage to the pier column is the main reason for the fall and collapse of the beam, and it is difficult to repair and use after the earthquake. Therefore, how to improve the seismic performance of bridge piers is one of the key problems in bridge seismic research. On the basis of continuous research and innovation, Professor Qiu Wenliang of Dalian University of Science and Technology put forward for the first time a new type of concrete filled steel tube (CFST) bridge pier with concrete filled steel tube (CFST) as the core column in ordinary reinforced concrete (RC) pier. The seismic performance of piers can be greatly improved. The existing engineering practice mainly focuses on the application of CFST core composite columns in the field of high-rise buildings, and the related research results focus on the axial compression behavior of composite columns under static load. The bridge structure has different structure system, load type and force transfer mechanism. Composite column as a member of pier must have its different performance characteristics, but the related research results are rare. The purpose of this paper is to deeply understand and grasp the seismic behavior of composite piers with core columns on concrete-filled steel pipe. The main work and results are as follows: (1) the research results of how to improve the seismic performance of piers at home and abroad are investigated. The concrete filled steel tube core column is applied to the common pier to improve the seismic performance of the beam bridge. (2) Quasi-static comparative tests of seven factors (axial compression ratio, hoop ratio, longitudinal reinforcement ratio, diameter and length of steel tube, strength on coagulation and shear span ratio) of combined pier column are carried out, and the design of test scheme is described in detail. Test process and damage development of model specimen; (3) analyze and deal with the test data, and evaluate the influence of the above factors on the seismic performance of the composite pier column, such as ductility, strength, energy dissipation and residual displacement. (4) based on the numerical analysis software OpenSees, the fiber unit model is established, and the numerical simulation of the pseudo-static test process is carried out, and the numerical results are compared with the experimental data. (5) based on the regression analysis of a large number of data, a practical formula for calculating equivalent yield moment of concrete filled steel tube (CFST) core column composite pier is put forward, which can provide a useful reference for the seismic design of this kind of pier.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55
【参考文献】
相关期刊论文 前2条
1 臧华;刘钊;李红英;涂永明;;钢管混凝土桥墩抗震性能试验研究[J];防灾减灾工程学报;2010年04期
2 王克海;李茜;;桥梁抗震的研究进展[J];工程力学;2007年S2期
，本文编号：2382233
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