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为了修订行业标准《冷轧带肋钢筋混凝土结构技术规程》,本文进行了12块配置CRB550冷轧带肋钢筋混凝土板的静载试验,对板的正截面抗弯承载力、刚度、裂缝进行了研究。试验和分析研究结果表明:①试验板在钢筋使用应力达到400MPa时,其裂缝宽度和变形均满足使用状态要求;②实测承载力和规程公式计算的承载力相比较,实测值与计算值比值的平均值为1.28,说明规程计算是偏安全的;③规程(JGJ95-2003)裂缝宽度公式计算值与实测值吻合很好;④规程(JGJ95-2003)的刚度计算值比实测值偏小,建议进行修正。
In order to revise the industry standard “Technical Specification of Cold-Rolled Ribbed Reinforced Concrete Structure”, static load test of 12 pieces of CRB550 cold-rolled ribbed reinforced concrete slabs was carried out. The normal section flexural capacity, rigidity and crack of the slab the study. The results of the test and analysis show that: (1) The crack width and deformation of the test plate meet the requirements of service state when the stress of steel bar reaches 400MPa; (2) Compared with the bearing capacity calculated by the measured bearing capacity and the formula formula, the ratio of the measured value to the calculated value (JGJ95-2003) crack width formula is consistent with the measured values well; ④ procedures (JGJ95-2003) the calculated value of stiffness is smaller than the measured value, it is recommended Correct.