朱尔玉,李冬冬,齐明,朱力.水工混凝土构件配置高强钢筋后裂缝计算研究[J].水利学报,2018,49(5):580-587 |
水工混凝土构件配置高强钢筋后裂缝计算研究 |
Experimental research on crack calculation of hydraulic RC beams with high-strength rebars |
投稿时间:2018-02-11 |
DOI:10.13243/j.cnki.slxb.20180151 |
中文关键词: 水工混凝土构件 高强钢筋 规范修订 平均裂缝间距 最大裂缝宽度 |
英文关键词: the hydraulic RC beam high-strength rebar the revise of DCHCS average crack spacing maximum crack width |
基金项目:国家重大科研仪器研制项目(51727813);中国铁路总公司科研项目(Z2014-038) |
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中文摘要: |
为了研究水工混凝土构件配置高强钢筋后裂缝计算公式,从而对《水工混凝土结构设计规范》(SL191-2008)中裂缝计算公式修正提供参考,本文对32根高强钢筋混凝土梁进行了受弯试验研究,分析其裂缝发展性能,结合收集到的其他研究者同类试验裂缝数据共计167组,从水工角度对该类构件的裂缝宽度计算进行了统计分析。结果表明:此类高强钢筋混凝土构件裂缝发展规律同普通钢筋混凝土构件相同。但是,构件短期效应下最大裂缝宽度实测值大于2008水工规范计算值。为此,本文基于以上试验数据给出了与试验数据符合良好的裂缝宽度计算公式。这些公式不仅可以用于配置高强钢筋水工混凝土构件的裂缝计算,而且还可以作为《水工混凝土结构设计规范》修订参考。 |
英文摘要: |
In order to study the crack calculation of hydraulic RC beam with high-strength rebars and guide the revise about calculation formulas of crack given by Design Code for Hydraulic Concrete Struc-tures (DCHCS), 32 RC beams were tested under flexural loading to analyze the development and property of crack. With almost 167 beams' crack data collected from the author's tests and other researchers' tests, the calculation for crack width was discussed by analyzing the development of calculation method about crack width given by DCHCS. The results show that the development of the crack width is similar to the RC beams with low-strength rebars. But the test values about maximum crack width are greater than the calculated values. Based on the experimental data, the calculation formulas for average crack spacing and maximum crack width are given,which can work well with the results of all tests. The calculation for-mulas about crack width not only can be used for the RC beams with high-strength rebars, but also can be applied to the specification revision for DCHCS. |
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