| 先张预应力混凝土板最小板长及钢绞线折算强度计算方法 |
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| 引用本文： | 王勃,刘广义,王劲.先张预应力混凝土板最小板长及钢绞线折算强度计算方法[J].哈尔滨建筑大学学报,2001,34(6):36-38. |
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| 作者姓名： | 王勃 刘广义 王劲 |
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| 作者单位： | 1. 哈尔滨工业大学,土木工程学院,黑龙江,哈尔滨,150090
2. 吉林省林业公安干警学校,吉林,长春,130021 |
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| 摘 要： | 首先分析了高强钢绞线在先张预应力构件中的粘结锚固性能，将预应力传递长度与弯曲粘结长度之和定义之延伸长度，给出了延伸长度的计算公式。其次为使构件破坏时充分发挥预应力钢绞线的强度，防止弯曲裂缝出现在延伸长度之内，提出了先张预应力混凝土板在均布荷载作用下的最小板长。最后针对预应力混凝土板长小于最小板长时会在延伸长度内出现弯曲裂缝，需将钢绞线强度进行折减，并提出了钢绞线折算强度的计算方法。
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| 关 键 词： | 钢绞线 预应力混凝土板 先张 粘结 锚固 弯曲裂缝 折算强度 |
| 文章编号： | 1006-6780(2001)06-0036-03 |
| 修稿时间： | 2000年10月10 |
Least length of pretensioned prestressed slab and calculation of steel strand's discount strength |
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| WANG Bo ,LIU Guang-yi ,WANG Jin.Least length of pretensioned prestressed slab and calculation of steel strand's discount strength[J].Journal of Harbin University of Civil Engineering and Architecture,2001,34(6):36-38. |
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| Authors: | WANG Bo LIU Guang-yi WANG Jin |
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| Affiliation: | WANG Bo 1,LIU Guang-yi 1,WANG Jin 2 |
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| Abstract: | Firstly,the development length is the summation of transmitting length and flexural bond length.Secondly,the least length of pretensioned prestressed concrete slab is defined to make the full use of steel strand strength and avoid flexural crack occurs within the development length.Thirdly,the strength of steel strand should be discounted when the length of pretensioned prestressed concrete slab is less than the least length.The calculation of steel strand's discount strength is presented. |
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| Keywords: | steel strand prestressed concrete slab pretensioned bond anchorage flexural crack development length least length of slab discount strength |
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