DEFLECTION CONTROL OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH EXTERNAL TENDONS
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摘要: 采用等效荷载模拟对体外预应力加固配筋混凝土梁进行使用性能分析,随荷载的增加,体外预应力的等效荷载也相应增大。根据受弯构件极限荷载下体外预应力增量,建议使用荷载下相应的预应力增量,在此基础上即可按既有的变形计算方法分析加固构件的变形。Abstract: For analysis of serviceability behavior of reinforced concrete beams strengthened with external tendons,external prestressing effects can be modeled as equivalent loads varying with imposed external loads.Formulas of stress increments of external tendons were proposed for serviceability state based on those for capacity ultimate state,and thus current deflection calculation methods can be used.
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Key words:
- external prestressing /
- strengthening /
- deflection control
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宋玉普.新型预应力混凝土结构[M].北京:机械工业出版社,2005. [2] 王云飞.体外预应力技术在混凝土结构加固改造工程中的应用研究[D].南京:东南大学,2009. [3] 吕志涛,孟少平.现代预应力结构设计[M].北京:中国建筑工业出版社,1998. [4] GB 500102002混凝土结构设计规范[S]. [5] ACI Committee 318.Building Code Requirements for StructuralConcrete(ACI 31808)and Commentary(318 R08)[S].
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