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前言在港口工程中,钢筋混凝土环形、园形截面偏心受压、受弯、偏心受拉、轴心受拉构件是经常遇到的.这些构件的截面设计,除进行强度计算外,还需根据使用要求,进行截面抗裂度和裂缝开展宽度的计算.我国现行港口工程技术规范JTJ220-82<~2>未给出实用的环形、园形截面的裂缝宽度计算公式,对抗裂度计算公式也有必要进一步完善.为此,从1976年6月至1980年10月,在交通部水运规划设计院及第一航务工程局支持
Foreword In the port engineering, the circular, circular section of reinforced concrete is subject to eccentric compression, bending, eccentric tension, axial tension members are often encountered. The cross-section design of these components, in addition to the calculation of strength, but also based on Requirements for use, calculation of cross-section cracking resistance and crack development width. China’s current port engineering technical specification JTJ220-82<~2> does not give a practical formula for calculation of crack widths for circular and circular sections, and there are also formulas for calculating cracking resistance. It is necessary to further improve. To this end, from June 1976 to October 1980, it was supported by the Ministry of Transport’s Water Transport Planning and Design Institute and the First Navigation Engineering Bureau.