钢筋混凝土结构锈胀裂缝的计算机模拟

根据钢筋混凝土锈胀动力学原理，推导出锈蚀钢筋周围混凝土锈胀位移场的表达式。并用基于虚拟裂缝模型（ＦＭ）的非线性有限元方法，建立了钢筋混凝土结构的锈胀裂缝开裂过程的分析模型，利用编制的程序，对钢筋混凝土构件的锈裂过程进行了计算机模拟，结果表明，该模型为获得了锈胀开裂条件以及锈蚀量与锈胀裂缝宽度之间的定量关系提供了可能。

Computer Simulation of Corrosive Cracks on RC Members

On the basis of the theory of corrosive dynamics for RC and a lot of test data, an expression for the displacement field of the concrete around corroded steel bars is derived. By using the nonlinear finite element method based on the fictitious crack model (FCM) of fracture mechanics of concrete structure, a model is built for analyzing the whole cracking process of the corrosive cracks in RC members. Meanwhile, a computerized simulation for the corrosive cracking process of RC members is carried out with programs made by the authors. Results show that the model proposed in this paper makes it possible to acquire the critical condition for the cracking of corrosive crack and to obtain a quantitative relationship between the corrosive losing rate of steel and the width of corrosive crack.