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钢筋混凝土结构中的钢筋锈蚀发展可直接引起钢筋的体积膨胀,导致沿钢筋周围的内部压力产生并在混凝土中产生裂缝,随着钢筋表面的进一步粗糙,钢筋与混凝土间的粘结力将受到一定的影响。通过对米兰工业大学的试验结果运用有限元方法进行模拟分析,并利用钢筋热膨胀模型成功地模拟了钢筋锈蚀对混凝土粘结力的影响,其最大荷载与试验值逼近,粘结力变化趋势亦基本一致。
The development of steel corrosion in reinforced concrete structures can directly cause the volume expansion of steel bars, resulting in internal pressure along the steel bars and cracks in the concrete. As the reinforcing steel surface becomes more rough, the bond between the steel bars and the concrete will be affected Impact. The finite element method was used to simulate and analyze the test results of Milan Polytechnic University. The influence of steel corrosion on concrete adhesion was simulated successfully by using the thermal expansion model of rebar. The maximum load approached the test value, and the trend of the bond strength changed basically Consistent.