冻融循环条件下砌体受压损伤本构模型
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摘要
为了得到冻融循环条件下砌体受压损伤本构关系模型,首次将应变等价原理应用于砌体结构中,将冻融循环后的轴心受压砌体的总损伤等效为冻融阶段和轴心受压阶段两种状态下损伤的非线性耦合,然后基于损伤力学基本原理和砌体细观结构的非均匀性,分析两种损伤状态的劣化过程以及损伤演化途径,推导冻融循环后的轴心受压砌体的总损伤演化方程,最终建立冻融循环条件下砌体受压损伤本构关系模型,并通过已有试验数据验证了模型的合理性。
In order to get the constitutive relationship model under freeze-thaw cycles for compression masonry,the promoted strain equivalence principle is applied to the masonry structures for the first time and the total damage of the masonry which withstand axial load after freeze-thaw cycles were equaled to the nonlinear coupling of the freeze-thaw damage and axial compression damage. Then based on the basic principles of damage mechanics and the nonhomogeneity of masonry microstructure,deterioration process and damage evolution route for the two damage states were analyzed,the total damage evolution equation of masonry withstanding axial compression after freeze-thaw cycles was derived,finally the constitutive relationship model under freeze-thaw cycles for compression masonry was established and was verified to be rational by existing test data.
In order to get the constitutive relationship model under freeze-thaw cycles for compression masonry,the promoted strain equivalence principle is applied to the masonry structures for the first time and the total damage of the masonry which withstand axial load after freeze-thaw cycles were equaled to the nonlinear coupling of the freeze-thaw damage and axial compression damage. Then based on the basic principles of damage mechanics and the nonhomogeneity of masonry microstructure,deterioration process and damage evolution route for the two damage states were analyzed,the total damage evolution equation of masonry withstanding axial compression after freeze-thaw cycles was derived,finally the constitutive relationship model under freeze-thaw cycles for compression masonry was established and was verified to be rational by existing test data.
引文
[1]金祖权.西部地区严酷环境下混凝土的耐久性与寿命预测[D].南京:东南大学,2006.
[2]清华大学,西南交通大学,北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[3]冀晓东,宋玉普,刘建.混凝土冻融损伤本构模型研究[J].计算力学学报,2011,28(3):461-467.
[4]刘卫东,苏文悌,王依民.冻融循环作用下纤维混凝土的损伤模型研究[J].建筑结构学报,2008,29(1):124-128.
[5]王春来,徐必根,李庶林,等.单轴受压状态下钢纤维混凝土损伤本构模型研究[J].岩土力学,2006,27(1):151-154.
[6]林皋,刘军,胡志强.混凝土损伤类本构关系研究现状与进展[J].大连理工大学学报,2010,50(6):1055-1063.
[7]彭修宁,韦树英,张喜德.腐蚀环境下混凝土结构疲劳性能研究综述[J].广西大学学报:自然科学版,2003,28(4):347-350.
[8]杨卫忠.砌体受压本构关系模型[J].建筑结构,2008,38(10):80-82.
[9]王述红,唐春安,吴献.砌体开裂过程数值模型及其模拟分析[J].工程力学,2005,22(2):56-61.
[10]GB/T 50082—2009普通混凝土长期性能和耐久性能试验方法标准[S].
[11]JGJ/T 70—2009建筑砂浆基本性能试验方法标准[S].
[12]GB/T 4111—2013混凝土小型空心砌块试验方法[S].
[13]施楚贤.砌体结构理论与设计[M].北京:中国建筑工业出版社,2003.
[2]清华大学,西南交通大学,北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[3]冀晓东,宋玉普,刘建.混凝土冻融损伤本构模型研究[J].计算力学学报,2011,28(3):461-467.
[4]刘卫东,苏文悌,王依民.冻融循环作用下纤维混凝土的损伤模型研究[J].建筑结构学报,2008,29(1):124-128.
[5]王春来,徐必根,李庶林,等.单轴受压状态下钢纤维混凝土损伤本构模型研究[J].岩土力学,2006,27(1):151-154.
[6]林皋,刘军,胡志强.混凝土损伤类本构关系研究现状与进展[J].大连理工大学学报,2010,50(6):1055-1063.
[7]彭修宁,韦树英,张喜德.腐蚀环境下混凝土结构疲劳性能研究综述[J].广西大学学报:自然科学版,2003,28(4):347-350.
[8]杨卫忠.砌体受压本构关系模型[J].建筑结构,2008,38(10):80-82.
[9]王述红,唐春安,吴献.砌体开裂过程数值模型及其模拟分析[J].工程力学,2005,22(2):56-61.
[10]GB/T 50082—2009普通混凝土长期性能和耐久性能试验方法标准[S].
[11]JGJ/T 70—2009建筑砂浆基本性能试验方法标准[S].
[12]GB/T 4111—2013混凝土小型空心砌块试验方法[S].
[13]施楚贤.砌体结构理论与设计[M].北京:中国建筑工业出版社,2003.
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