【作者】 吴庆；

【导师】 柳炳康；

【作者基本信息】 合肥工业大学 ， 结构工程， 2003， 硕士

【摘要】 混凝土结构在施工和使用过程中常发现不同形式的裂缝，对于非荷载因素引起的裂缝，我国《规范》尚未给出相应的计算方法和全面的控制措施。本文对非荷载裂缝，特别是温度—收缩裂缝进行了调查研究，并对两端或四周约束的梁、板和底部约束的地下连续墙进行了收缩应力分析，发现国内外有关文献给出的收缩计算公式没有考虑泵送商品混凝土的水泥用量、外加剂使用、骨料粒径和砂用量等因素的影响，计算出的混凝土收缩量往往偏小；另外，《规范》中针对温度—收缩裂缝的构造措施不足。针对这些问题，本文在总结国内外先进经验的基础上，采用了弹性理论得出了相应的计算公式，提出了构造方面的加强措施，并通过具体的工程实例对计算公式和构造措施加以验证，结果比较理想。更多还原

【Abstract】 Different kinds of crack emerge during the process of constructing and using concrete structure. As to the loaded crack, the CODE of our country has offered calculating method and control measure. This thesis investigated and researched on non-loaded crack, especially those caused by thermal-shrink, and analyzed the thermal-shrink stress of beam, slab and continuous-wall, found that according data of civil and overseas offered thermal-shrink calculating formula without considering effect of factors, such as the cement quantity, using of aruhuesiru, aggregate size and quantity of sand, which made the result data smaller. In addition, there are not enough construct measure in CODE. To deal with these problems, base on the conclusion of advanced experiences of civil and abroad and adopted elastic theory, this thesis draw to the calculating formula and offered some strengthen measure. These formula and measures have been tested by practical construction, and the results are satisfied.更多还原