Bond Property Test of Reinforced Concrete with All Soaking and Impressed Current Method Corrosion

In order to research the bond properties between corroded reinforcement bars and concrete,reinforcement bars with different diameters and different types and concrete with different strength levels were treated specially with all soaking and impressed current method,and the bond properties were measured with the pull-out test.The comparative analysis of the bond properties of corroded reinforcement bars was carried out.The results showed that the types of reinforcement bars and concrete had great influence on the bond strength.The corrosion and volume expansion of reinforcement bars made concrete in tensile condition,which tended to produce cracks in parallel reinforced direction.The typical bond failure of plain reinforcement bars was pull-out,while the typical bond failure of ribbed reinforcement bars was split.The bond strength between corroded reinforcement bars and concrete increased with the increase of concrete strength.The bond strength of plain and ribbed reinforcement bars showed a decreasing trend after the first increase with the increase of the extent of corrosion.Through the test,the coefficients of the bond strength of plain and ribbed reinforcement bars were given,respectively.

论雷诺阿后期创作的转型与突破

雷诺阿60多年的艺术生涯,有着数千幅传世作品,但人们所熟知的只是他中年之前典型的印象派风格。事实上,雷诺阿在35岁创作出《船上的午宴》之后直到70多岁,从未停止自我否定和艺术更新,几乎每数年就有所转变。本文通过对部分代表作品的形式分析,从笔触形态、稀释画法、色彩和透视造型等方面,追踪"雷诺阿式"渐隐法的发展过程,并结合那几十年中其他画家如莫奈、塞尚、莫里索等人的互相影响,凸现雷诺阿后期创作的独特之处。