【作者】 方孝伍；

【导师】 朱岳明；

【作者基本信息】 河海大学 ， 水工结构工程， 2004， 硕士

【摘要】 本文就水工涵闸工程混凝土的裂缝问题进行了详细的研究，总结了裂缝的形式，分析了裂缝的形成原因，对控制裂缝的工程措施进行了深入的研究，运用数学模型对种种工程措施进行计算，量化分析其效果。主要内容如下： 1．开发了非稳定温度场和应力仿真计算的三维有限元计算程序及有限单元法的前后处理程序，运用此程序对水工涵闸工程混凝土进行了温度场和应力场的计算分析，得出相关结论。 2．对水工涵闸工程墩墙和底板混凝土的裂缝现象分别进行了阐述，总结其规律，分析其成因，并研究其开裂机理，为采取相应的工程防裂措施提供理论依据。 3．对水工涵闸工程混凝土的典型数学模型进行了深入的研究，并应用有限元计算程序对数学模型进行分析，比较了采用和不采用各种工程措施的不同的结果，得出采用相应的工程措施带来的防裂效果，为实际工程采用何种工程措施提供有益的参考。 4．针对实际工程混凝土施工需要，着重研究了后浇带、部分墩墙和底板同时浇筑和布置冷却水管三种工程措施所带来的混凝土应力的变化情况。将工程措施应用于实际工程。更多还原

【Abstract】 The crack problem of hydraulic culvert and sluice engineering concrete is rather thoroughly studied in the present paper. Concluded the shape of crack, analyzed the mechanism of cracking, and researched on the engineering measure for prevent from the cracking in this paper. Mathematical model for kinds of engineering measures is calculated; results from all kinds of measures are obtained. The main contents are as follows:1. A 3-D simulative calculation program concerning temperature field and creep stress field and its pre-processing and post-processing has been developed. By applying this program, temperature field and creep stress field of hydraulic culvert and sluice engineer concrete is simulated.2. The phenomenon of crack that appears in the hydraulic culvert and sluice is explained separately. The rule is concluded. The mechanism that forms the crack is studied.3. The typical mathematical model of hydraulic culvert and sluice is thoroughly studied. By using the FEM program, the model is analyzed. The different conclude can be drawn from using the engineering measures or not using them. This can help determine what the best engineering measures can be used.4. Systemic analyses of the practical engineering have been done. The engineering measures including post-pouring belt, part pier pouring with lock floor at one time and pipe cooling is been thoroughly studied. By applying these measures, the stresses in the concrete change. This can offer temperature control and crack prevention in reason to the project.更多还原