超长框架梁板结构温度和收缩裂缝研究

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RESEARCH ON TEMPERATURE AND SHRINKAGE CRACK OF SUPER-LONG FRAME BEAM-SLAB STRUCTURE

摘要: 大面积混凝土梁板结构在大型公共建筑中有着广阔的应用。主要特点是整浇楼面结构的长度与宽度超过规范限定值,分析温度变化及混凝土的收缩徐变对结构的影响是解决这个问题的关键。结合工程实例,提出了与实测数据比较吻合的收缩徐变公式。有限元模型用板单元模拟梁的梁板单元简化模型分析温度应力与实际情况最为接近。对于实际工程具有指导意义。
- 超长框架梁板结构 /
- 收缩 /
- 徐变 /
- 裂缝
Abstract: large-area concrete structure is a kind of structure with an attractive outlook in large-scale public buildings. It mainly means the length or width of the monolithically cast concrete structure is longer or wider than the maximum of the structure in the code. The influence of temperature change, shrinkage and creep on structure is the key to solve the problem. Through a practical engineering, shrinkage and creep formulas being in accord with test results are brought forward. Finite element model which adopts plat element to simulate beam is close to practice and can be directed to project.
- super-long frame beam-slab structure /
- shrinkage /
- creep /
- crack