约束混凝土的温度抗裂性试验研究

Study and Experiment on Crack Resistance of Restained Concrete Under Temperature Load

温度和温度应力的变化规律是温控设计中要解决的关键问题．本文在国内首次成功地开展了“全约束温凝土的温度抗裂性试验”和“全约束混土的膨胀预压应力测试试验”研究．探索了试验原理和方法、试验步骤和加调荷载装置，模拟了现场浇筑混凝土的温升温降过程．通过试验基本掌握了温度和温度应力的变化规律，提出了试验研究成果．这些试验研究结果对温控设计、施工和科研工作都具有参考价值，并为深入研究奠定了基础。

The key problen in temperature control design is regulation of temperature and temperature stress variations. Studies on 'experiment for crack resistance of fully restained concrete under temperature loads and 'experiment and test for dilatated precompression stress of fully restained concrete' are perfomed. Experiment priciples,methods,steps and loading devices are explored. Temperature rise and fall are simulated during placement of concrete in site. Regulation for temperature and temperature stress variations is known from experiment. The analysis results provided are very helpful to temperature control design,construction and scientific reserach and lay a foundation for thorough study.