THE DEFLECTION CALCULATION OF EXTERNALLY PRESTRESSED CONCRETE BEAM
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摘要: 对国内外体外预应力混凝土梁挠度的计算方法进行了总结与分析,已有计算方法考虑预应力增量及二次影响仅限于短期挠度计算。进一步的分析表明,体外预应力受弯构件挠度计算还需要考虑材料的非线性、混凝土收缩和徐变、高温等因素及各因素之间的相互影响。Abstract: The deflection calculation methods of externally prestressed concrete beam both home and abroad are reviewed.The existing methods have considered tendon stress increase and second-order effect, but limited to shor-t term deflection calculation. Further analysis indicate that other factors such as material non-linear, concrete shrinkage and creep, high temperature performance, as well as the interaction among these factors, should also be considered.
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Key words:
- external prestressing /
- deflection /
- stress increment /
- second-order effect /
- shrinkage and creep
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