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以西安国瑞国际金融中心工程为背景,对大厚度钢板-混凝土组合剪力墙大体积混凝土的温度裂缝防控问题进行研究。首先通过原材料选择和配合比的优化设计,降低混凝土水化热,预控早期混凝土裂缝。然后通过足尺模型试验,对大厚度组合剪力墙的早期温度场及裂缝发生情况进行实测分析,根据试验结果提出一系列针对性的裂缝防控措施及建议。结果表明采用优化设计及建议的实际工程裂缝控制状况良好,优于同类工程的裂缝控制效果。
Taking Xi’an Guorui International Financial Center Project as a background, the temperature crack prevention and control of mass concrete with large thickness steel-concrete composite shear walls is studied. First through the optimization of raw material selection and mix design, reduce the heat of concrete hydration, pre-control early concrete cracks. Then by full-scale model test, the early temperature field and crack occurrence of the combined shear wall with large thickness were measured and analyzed. Based on the test results, a series of targeted measures for prevention and control of cracks were proposed. The results show that the actual projects with optimized design and recommendations are in good condition and better than other similar projects.