[1]郭力,周陈凯,张芹,等.混凝土Lattice模型参数修正及钢筋混凝土锈胀破坏模拟[J].东南大学学报(自然科学版),2015,45(6):1140-1144.[doi:10.3969/j.issn.1001-0505.2015.06.021] 　Guo Li,Zhou Chenkai,Zhang Qin,et al.Parameter updating on Lattice model of concrete and simulation of corrosion damage in reinforced concrete[J].Journal of Southeast University (Natural Science Edition),2015,45(6):1140-1144.[doi:10.3969/j.issn.1001-0505.2015.06.021] 点击复制 混凝土Lattice模型参数修正及钢筋混凝土锈胀破坏模拟() 分享到： var jiathis_config = { data_track_clickback: true };

45

2015年第6期

1140-1144

2015-11-20

文章信息/Info

Title:
Parameter updating on Lattice model of concrete and simulation of corrosion damage in reinforced concrete

Author(s):
Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing 210096, China

Keywords:

O34
DOI:
10.3969/j.issn.1001-0505.2015.06.021

Abstract:
A parameter updating method is studied to improve the computational accuracy of the Lattice model of concrete. First, the displacement and the stress computed by using the Lattice model are compared with those by using the general finite element model. The parameters associated to the displacement ratio and the stress ratio are linear with respect to the characteristic length of the rod element in the Lattice model with a single material type. Secondly, a progressive parameter updating method is developed. The section area of the rod element and the elastic modulus are modified successively. Then, by the method of simultaneous correction for multiple parameters, the Lattice model of concrete containing three phases is modified and the computational errors of the displacement and the stress are less than 5%. Finally, the corrosion damage process of reinforced concrete structure is simulated based on the modified model. The results show that rusting expansion of corner reinforcement drives simultaneously horizontal and vertical cracks in concrete propagating throughout the full depth of cover. The net distance between the rusting rods influences significantly on the cracking pattern. When the net distance is about the same as the depth of the cover, the main crack in the horizontal direction between the rusting rods is likely to form, which may inhibit the cracks along other directions.

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