混凝土结构设计新旧规范中构件适用性分析结果比较

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基金项目:

国家自然科学基金项目(51109121);高速铁路建造技术国家工程实验室开放基金项目;湖北省教育厅科学研究计划重点项目(D20091310)

COMPARISON OF THE SERVICEABILITY ANALYSIS BETWEEN THE PRESENT AND OLD CODES FOR DESIGN OF CONCRETE STRUCTURES

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College of Civil Engineering &Architecture,China Three Gorges University,Yichang 443002,China

摘要: 通过钢筋混凝土梁的加载试验,对GB 500102010和GB 500102002《混凝土结构设计规范》中给出的最大裂缝宽度和挠度计算公式的理论值进行了验证和比对。结果表明:正常使用极限状态时,依GB500102010求得梁的最大裂缝宽度比GB 500102002值偏小11%～22%,短期挠度值偏小约7.5%～10.5%;荷载达正常使用极限状态前,在同一荷载水平下依GB 500102010所得梁的长期挠度值小于GB 500102002值,偏小约为2.8%左右。
- 钢筋混凝土结构 /
- 正常使用极限状态 /
- 裂缝最大宽度 /
- 挠度
Abstract: By the loading test of RC beams,the theoretical values of the maximum crack widths and deflections were validated and compared based on the present and old editions of Code for Design of Concrete Structures(GB 500102010 and GB 500102002).The results showed that in the normal limited state,the value of maximum crack width according to the new code was 11%～22% smaller than to the old one,and the short-term deflection smaller about 7.5%～10.5%;under the same load level,the long-term deflection based on the new code was about 2.8% less than on the old one until the normal limited state.
- reinforced concrete structure /
- normal limited state /
- maximum crack width /
- deflection