大气腐蚀环境下钢构件抗力退化模型
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摘要
处于腐蚀环境中的钢构件,不可避免地存在由于腐蚀引起的抗力退化,但目前缺乏相关研究,故研究腐蚀引起的钢构件抗力退化具有重要的价值。首先选择合适的抗力退化模型,然后总结分析了影响腐蚀钢构件抗力的因素,据此建立了钢材腐蚀深度计算公式,进而推导建立了常用截面带腐蚀参数几何特性计算公式,并结合已有研究得到的腐蚀钢材力学性能参数,建立了腐蚀钢构件抗力退化模型。
Owing to the corrosion of atmosphere,resistance of steel member deteriorate inevitably.However,relevant study was insufficient,so research on deterioration model for resistance of steel member have great significance.Firstly,the appropriate modeling method to describe the resistance deteriorate with time was chosen,then the influencing factors for resistance of corroded steel member were summarized and analyzed.The formula for corrosion depth of steel member was established.And formula with corrosion parameters for geometric characteristics of common were also derived.Furthermore,on the basis of mechanical property parameters of corrosive steel which was proposed by previous research,the deterioration model for resistance of steel member in atmospheric environment was built.
Owing to the corrosion of atmosphere,resistance of steel member deteriorate inevitably.However,relevant study was insufficient,so research on deterioration model for resistance of steel member have great significance.Firstly,the appropriate modeling method to describe the resistance deteriorate with time was chosen,then the influencing factors for resistance of corroded steel member were summarized and analyzed.The formula for corrosion depth of steel member was established.And formula with corrosion parameters for geometric characteristics of common were also derived.Furthermore,on the basis of mechanical property parameters of corrosive steel which was proposed by previous research,the deterioration model for resistance of steel member in atmospheric environment was built.
引文
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[2] 陈昌海.建筑钢结构抗力性能的时间影响因素分析及时变可靠性评价[D].重庆:重庆大学土木工程学院,2007.Chen Changhai.The time influence factor analysis of Building steel structure resisting force performance and Time-variation reliability appraisal[D].Chongqing:Chongqing University,2007.(in Chinese)
[3] 姚继涛,赵国藩,浦聿修.拟建结构和现有结构的抗力概率模型[J].建筑科学,2005,21(3):13-15.Yao Jitao,Zhao Guofan,Pu Yuxiu.Probabilistic models for resistance of structures in design and in service[J].Building Science,2005,21(3):13-15.(in Chinese)
[4] 姚继涛,刘金华,吴增良.既有结构抗力的随机过程概率模型[J].西安建筑科技大学学报(自然科学版),2008,40(4):445-449.Yao Jitao,Liu Jinhua,Wu Zengliang.Model for stochastic resistance of existing structures[J].Journal of Xian University of Architecture and Technology (Natural Science Edition),2008,40(4):445-449.
[5] 国家技术监督局.GB/T 15957—1995大气环境腐蚀性分类[S].北京:中国建筑工业出版社,1995.The state bureau of quality and technical supervision.GB/T 15957—1995 Corrosivity classification of atmospheric environment[S].Beijing:China Architecture and Building Press,1995.(in Chinese)
[6] 中华人民共和国住建部.JGJ/T 251—2011建筑钢结构防腐技术规程[S].北京:中国建筑工业出版社,2011.Ministry of Housing and Ruban-rural Development of the People’s Republic of China.JGJ/T 251—2011 Technical specification for anticorrosion of building steel structure[S].Beijing:China Architecture and Building Press,2011.(in Chinese)
[7] 国家技术监督局.GB/T 30790.2—2014 色漆和清漆-防护涂料体系对钢结构的防腐蚀保护第2部分:环境分类[S].北京:中国标准出版社,2014.The state bureau of quality and technical supervision.GB/T 30790.2—2014 Paints and varnishes Corrosion protection of steel structures by protective paint systems Part2:Classification of environments[S].Beijing:Standards Press of China,2014.(in Chinese)
[8] 李运德,张亮,姜小刚,等.现代桥梁钢结构防腐涂层体系设计[J].电镀与涂饰,2010,30(1):57-62.Li Yunde,Zhang Liang,Jiang Xiaogang,et al.Design of anticorrosion coating system for modern bridge steel structure[J].Electroplating and Finishing,2010,30(1):57-62.(in Chinese)
[9] 甄毅.钢结构防腐及耐候钢在建筑工程中的应用[J].工程设计与建设,2005,37(1):41-44.Zhen Yi.Corrosion resistance of steel structure and application of weathering steels in building projects[J].Engineering Design and Construction,2005,37(1):41-44.(in Chinese)
[10] 史炜洲,童乐为,陈以一,等.腐蚀对钢材和钢梁受力性能影响的试验研究[J].建筑结构学报,2012,33(7):53-60.Shi Weizhou,Tong Lewei,Chen Yiyi,et al.Experimental study on influence of corrosion on behavior of steel material and steel beams[J].Journal of Building Structures,2012,33(7):53-60.(in Chinese)
[11] 中华人民共和国住建部.GB 50017—2003 钢结构设计规范[S].北京:中国计划出版社,2003.Ministry of Housing and Ruban-Rural Development of the People’s Republic of China.GB 50017—2003 Code for design of steel structures[S].Beijing:China Architecture and Building Press,2003.(in Chinese)