Calculating models of time-dependent reliability for existing reinforced concrete beam
-
摘要: 分析了目前既有结构时变可靠度计算理论和现行规范计算公式, 考虑混凝土损伤和钢筋锈蚀以及材料强度随时间劣化的情况, 建立了既有钢筋混凝土梁(单筋矩形截面、双筋矩形截面和T形截面)的时变抗力计算模型, 给出了既有钢筋混凝土梁的时变可靠度指标, 并通过工程实例对既有钢筋混凝土梁进行了加固前计算分析。结果表明: 实例结构动态可靠度指标为1.56, 承载能力属于d级, 这与现行可靠性鉴定标准的评级相吻合, 因此, 计算模型合理可靠。Abstract: The current theory of time-dependent reliability for existing structures and the calculating formula in current standard were analyzed. Considering the condition of material strength deterioration with time and the damages of concrete and steel, time-dependent strength calculating models were built for single-side reinforced concrete beam with rectangular section, double reinforced concrete beams with rectangular section and T-shape section. The time-dependent reliability index was put forward, and an engineering example was studied. Analysis result shows that the reliability index of existing reinforced concrete beam is 1.56, its bearing capacity belongs to grade d and is fit with current reliability appraisal standard, so the calculating models are correct and reasonable.
-
表 1 活荷载修正系数
Table 1. Correction coefficients of live load
鉴定基准期/年 10 30 50 60 70 100 修正系数 0.80 0.95 1.00 1.02 1.05 1.10 
下载: 导出CSV
-
[1] 秦权, 杨小刚. 退化结构时变可靠度分析[J]. 清华大学学报: 自然科学版, 2005, 45(6): 733-736. doi: 10.3321/j.issn:1000-0054.2005.06.005QI N Quan, YANG Xiao-gang. Ti me-dependent reliability analysis of deteriorating structures[J]. Journal of Tsinghua University: Science and Technology, 2005, 45(6): 733-736. (in Chinese) doi: 10.3321/j.issn:1000-0054.2005.06.005 [2] 索清辉, 钱永久. 服役公路桥梁的时变可靠指标计算[J]. 交通运输工程学报, 2006, 6(1): 69-71. doi: 10.3321/j.issn:1671-1637.2006.01.014SUO Qing-hui, QI AN Yong-jiu. Ti me-dependent reliability index calculation of existed highway bridge[J]. Journal of Traffic and Transportation Engineering, 2006, 6(1): 69-71. (in Chinese) doi: 10.3321/j.issn:1671-1637.2006.01.014 [3] 李艺, 刘斌, 阎运起. 服役钢筋混凝土结构强度和刚度经时变化分析[J]. 建筑施工, 2002, 24(5): 392-394. doi: 10.3969/j.issn.1004-1001.2002.05.022LI Yi, LI U Bin, YAN Yun-qi. Ti me-dependent reliability analysis of strength and stiffness on existing reinforced concrete structure[J]. Building Construction, 2002, 24(5): 392-394. (in Chinese) doi: 10.3969/j.issn.1004-1001.2002.05.022 [4] MORI Y, ELLI NGWOOD B R. Reliability-based service-life assessment of aging concrete structures[J]. Journal of Structural Engineering, 1993, 119(5): 1600-1621. doi: 10.1061/(ASCE)0733-9445(1993)119:5(1600) [5] 邵旭东, 彭建新, 晏班夫. 基于结构可靠度的劣化桥梁维护方案成本优化研究[J]. 工程力学, 2008, 25(9): 149-155. https://www.cnki.com.cn/Article/CJFDTOTAL-GCLX200809025.htmSHAO Xu-dong, PENG Jian-xin, YAN Ban-fu. Structural reliability-based life-cycle cost opti mization of maintenance interventions for deteriorating bridges[J]. Engineering Mechanics, 2008, 25(9): 149-155. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GCLX200809025.htm [6] RACKWITZ R. Reliability analysis—a review and someperspectives[J]. Structural Safety, 2001, 23(4): 365-395. doi: 10.1016/S0167-4730(02)00009-7 [7] 屈文俊, 朱鹏, 张翔. 碳化混凝土桥梁再碱化过程的控制理论模型[J]. 中国公路学报, 2007, 20(2): 68-71. doi: 10.3321/j.issn:1001-7372.2007.02.013QU Wen-jun, ZHUPeng, ZHANG Xiang. Control theory model of realkalization process for carbonated concrete bridge[J]. China Journal of Highway and Transport, 2007, 20(2): 68-71. (in Chinese) doi: 10.3321/j.issn:1001-7372.2007.02.013 [8] 李运生, 张彦玲, 林玉森. 公路钢筋混凝土梁基于抗力劣化的可靠性分析[J]. 中国公路学报, 2003, 16(4): 50-54. doi: 10.3321/j.issn:1001-7372.2003.04.011LI Yun-sheng, ZHANG Yan-ling, LI N Yu-sen. Reliability analysis of highway reinforced concrete beam based on resistance deterioration[J]. China Journal of Highway and Transport, 2003, 16(4): 50-54. (in Chinese) doi: 10.3321/j.issn:1001-7372.2003.04.011 [9] 刘龄嘉, 贺拴海, 赵小星. 在役混凝土简支梁有效预应力计算[J]. 交通运输工程学报, 2005, 5(3): 47-51. http://transport.chd.edu.cn/article/id/200503010LI U Ling-jia, HE Shuan-hai, ZHAO Xiao-xing. Effective prestress computation of existing PC si mply-supported beam[J]. Journal of Traffic and Transportation Engineering, 2005, 5(3): 47-51. (in Chinese) http://transport.chd.edu.cn/article/id/200503010 [10] DI MITRI V. Deterioration of strength of RC beams due to corrosion andits influence on beamreliability[J]. Journal of Structural Engineering, 2007, 133(9): 1297-1306. doi: 10.1061/(ASCE)0733-9445(2007)133:9(1297) [11] 林拥军, 钱永久. 考虑抗力变化的既有构件可靠性鉴定目标可靠度指标的计算[J]. 土木工程学报, 2004, 37(12): 29-31. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC200412006.htmLI N Yong-jun, QI AN Yong-jiu. Reliability index calculation for the appraisal reliability target of existing structures with resistance variations[J]. China Civil Engineering Journal, 2004, 37(12): 29-31. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC200412006.htm [12] 马德云, 左勇志, 霍达, 等. 混凝土柱构件可靠性对随机参数的敏感性研究[J]. 建筑科学, 2008, 24(11): 40-45. https://www.cnki.com.cn/Article/CJFDTOTAL-JZKX200811011.htmMA De-yun, ZUO Yong-zhi, HUO Da, et al. Sensitivity study of RC columns members reliability relative to random parameters[J]. Building Science, 2008, 24(11): 40-45. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JZKX200811011.htm [13] LI Chun-qing. Reliability based service life prediction of corrosion affected concrete structures[J]. Journal of Structural Engineering, 2004, 130(10): 1570-1577. [14] 姚继涛. 现存结构可靠性评定方法的进展——国际标准《结构设计基础——现存结构的评定》ISO13822: 2001(E)综述[J]. 工业建筑, 2005, 35(2): 103-107. https://www.cnki.com.cn/Article/CJFDTOTAL-GYJZ200502028.htmYAOJi-tao. Developments of the methods to assess the relia-bility of existing structures[J]. Industrial Construction, 2005, 35(2): 103-107. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GYJZ200502028.htm -
点击查看大图
图(2) / 表(1)
计量
- 文章访问数: 284
- HTML全文浏览量: 71
- PDF下载量: 219
- 被引次数: 0
