Based on meeting the requirements of flexural strength, the effects made by ratio of longitudinal reinforcement on deflection and maximum value of crack width are analyzed.

在满足正截面承载力要求的基础上，分析了纵向配筋率的变化对挠度及最大裂缝宽度的影响。

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The parameters in the aeries include: amount of longitudinal reinforcement, amount of transverse reinforcement, shear span-to-depth ratio, thickness of tube wall and strength of concrete.

试验中的主要参数有：纵向钢筋的数量、横向配筋率、剪跨比、管壁的厚度及混凝土强度。

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The enhancement for ultimate axial compression ratio because of longitudinal reinforcement should be considered in a certain when the reliability index is not lower than that of current code.

提出在保证柱轴压比的可靠指标不低于现行《规范》的情况下，应适当考虑柱纵筋配筋率和配箍率对轴压比限值的提高。

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