Nonlinear seismic response analysis of direct air-cooled condenser vertical hybrid structure with diagonal bracing

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (7) : 141-148.

Steel-concrete vertical hybrid structure with diagonal bracing is a new structure system which is proposed in order to apply the direct air-cooled technology in high earthquake intensity areas, according to the type of platform, it can be divided into two types: steel truss-diagonal bracing structure and solid web girder-diagonal bracing structure. On the foundation of the seismic experiment of steel truss- diagonal bracing model structure, finite element software ABAQUS is used to calculate and analyze the base shear response, deformation properties and damage evolution characteristics of reinforced concrete pipe columns of two kinds structures with diagonal bracing. The results show that: the proposed simplification principles and finite element modeling methods are reasonable, calculated results agree well with the test results; under different earthquake intensities, the biggest base shear force and the shear-weight ratio of the steel truss-diagonal bracing structure are greater than the solid web girder-diagonal structure; the lateral displacement curves for two kinds of structures are both shifting from shear-moment-type toward shear-type as the earthquake intensity increase; the lateral displacement on and below the corbel of the steel truss-diagonal bracing structure is slightly greater than the solid web girder-diagonal structure, while above the corbel, it is just the opposite; the lateral displacement angel on the top of the column for the steel truss-diagonal bracing structure is slightly smaller than the solid web girder-diagonal structure; seismic performances of two kinds of structures are both good, which can meet the seismic acquirement of the large-capacity units in high earthquake intensity areas.

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Steel-concrete vertical hybrid structure with diagonal bracing is a new structure system which is proposed in order to apply the direct air-cooled technology in high earthquake intensity areas, according to the type of platform, it can be divided into two types: steel truss-diagonal bracing structure and solid web girder-diagonal bracing structure. On the foundation of the seismic experiment of steel truss- diagonal bracing model structure, finite element software ABAQUS is used to calculate and analyze the base shear response, deformation properties and damage evolution characteristics of reinforced concrete pipe columns of two kinds structures with diagonal bracing. The results show that: the proposed simplification principles and finite element modeling methods are reasonable, calculated results agree well with the test results; under different earthquake intensities, the biggest base shear force and the shear-weight ratio of the steel truss-diagonal bracing structure are greater than the solid web girder-diagonal structure; the lateral displacement curves for two kinds of structures are both shifting from shear-moment-type toward shear-type as the earthquake intensity increase; the lateral displacement on and below the corbel of the steel truss-diagonal bracing structure is slightly greater than the solid web girder-diagonal structure, while above the corbel, it is just the opposite; the lateral displacement angel on the top of the column for the steel truss-diagonal bracing structure is slightly smaller than the solid web girder-diagonal structure; seismic performances of two kinds of structures are both good, which can meet the seismic acquirement of the large-capacity units in high earthquake intensity areas.

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direct air-cooled steel-concrete vertical hybrid structure / diagonal bracing / seismic performance / damage evolution characteristics / finite element

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DAI Hui-juan1,BAI Guoliang2, WANG Bo2, ZHANG Shuyun1, DONG Ye-hui2 . Nonlinear seismic response analysis of direct air-cooled condenser vertical hybrid structure with diagonal bracing[J]. Journal of Vibration and Shock, 2015, 34(7): 141-148

References

[1] 白国良, 刘林, 李晓文. 空冷支架结构基于内容物的性能设计方法研究[J]. 建筑结构学院,2008,29(5):107-113.
[2] 戴振会, 孙奉仲, 王宏国. 国内外直接空冷系统的发展及现状[J]. 电站系统工程,2009,25(3):1-4+11.
    Dai Zhenhui, Sun Fengzhong, Wang Hongguo. Present status and development of direct air-cooling unit in the world[J]. Power System Engineering, 2009, 25(3): 1-4+11. (in Chinese)
[3] Dekker N, Venter P, Parrock A. Direct air cooled condenser support platform at Matimba Power Station [J]. The Civil Engineering in South Africa, 1987, 29( 7): 277 -279. (in Chinese)
[4] 朱丽华, 白国良, 赵更歧. 基于主子系统耦合效应的直接空冷结构体系振动特性研究[J]. 工程力学, 2011, 28(10):216-221.
    Zhu Lihua, Bai Guoliang, Zhao Gengqi. Study on vibration behavior of direct air cooled condenser support platform based on primary-secondary system coupling effect[J]. Engineering Mechanics, 2011, 28(10): 216-221.(in Chinese)
[5] 白国良,代慧娟, 刘林. 空冷支架结构体系优化与创新研究报告[R]. 西安：西安建筑科技大学土木工程学院资料室, 2012.
Bai Guoliang, Dai Huijuan, Liu Lin. Research on optimization and innovation of air cooled condenser structure[R].Xi’an: Reference Room of School of Civil Engineering, Xi’an University of Architecture and Technology, 2012. (in Chinese)
[6] 赵春莲,李红星,冉颢,等.1000MW直接空冷机组支架结构体系研究[J].武汉大学学报, 2007,(s):180-184.
Zhao Chunlian, Li Hongxing, Ran Hao, et al. Study on support structure system for direct air-cooling 1000 MW unit [J]. Journal of Wuhan University, 2007, 40(s): 180-184.(in Chinese)
[7] 赵春莲,李红星,唐六九,等.高强度区1000MW直接空冷机组空冷凝汽器支架及排汽管道支撑结构体系研究[J].现代电力,2011,28(6):64-67.
Zhao Chunlian, Li Hongxing, Tang Liujiu,et al. Study on 1000MW direct ACC and exhaust steam pipe support structure systems in highly seismic intensity zone[J]. Moden Electric Power, 2011, 28(6): 64-67.(in Chinese)
[8] 代慧娟, 白国良, 王博, 等. 钢斜撑+钢桁架+钢筋混凝土管柱竖向混合结构抗震性能试验研究[J].工程力学，doi:10.6052/j.issn.1000-4750.2012.12.1001.
Dai Huijuan, Bai Guoliang, Wang Bo, et al. Experimental study on the seismic performance of vertical hybrid structure of steel slant support-steel truss-reinforced concrete columns[J]. Engineering Mechanics, doi: 10.6052/j.issn. 1000-4750. 2012. 12.1001. (in Chinese)
[9] 吕西林, 金国芳, 吴晓涵.钢筋混凝土结构非线性有限元理论与应用(第二版)[M]. 上海:同济大学出版社,1999.
Lv Xilin, Jin Guofang, Wu Xiaohan. Theory and application of nonlinear finite element for reinforced concrete structure (second edition)[M].Shanghai: Tongji University Press,1999. (in Chinese)
[10] 庄茁，张帆，岑松，等. ABAQUS 非线性有限元分析与实例[M]. 北京: 科学出版社, 2005.
Zhuang Zhuo, Zhang Fan, Cen Song, et al. Analysis and examples of non-linear finite element software ABAQUS [M]. Beijing: Science Press, 2005. (in Chinese)
[11] 陆新征, 叶列平, 缪志伟, 等. 建筑抗震弹塑性分析—原理、模型与在ABAQUS, MSC.MARC和SAP2000上的实践[M]. 北京:中国建筑工业出版社,2009.
     Lu Xinzheng, Ye Lieping, Liao Zhiwei, et al. Elasto-plastic analysis of buildings against earthquake—theory, model and implementation on ABAQUS, MSC.MARC and SAP2000[M]. Beijing: China Building Industry Press, 2009. (in Chinese)