PVC Confining Effect on Axially Loaded Column
PVC Confining Effect on Axially Loaded Column
复制标题
PVC 对轴向受力柱的限制作用
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
B. SatputeM.
中科院分区：
文献类型：
--
作者：
Abhale R.B;Asst. Prof. Kandekar S.B;B. SatputeM.
聚氯乙烯（PVC）管填充混凝土轴向加载，直到试样破坏，以研究其承载能力。共铸样24个，其中聚氯乙烯管12个，钢管12个。聚氯乙烯管的直径。152.4 mm，厚度5mm，有效长度500mm和600mm。聚氯乙烯管与混凝土相互作用的一个主要优点是，聚氯乙烯管的约束作用延缓了混凝土的局部屈曲和聚氯乙烯管的屈曲，聚氯乙烯管的约束作用提高了混凝土的强度。在目前的国际实践中，无论是有支撑的建筑结构还是无支撑的建筑结构，其主侧抗力体系都采用钢管混凝土柱。钢管混凝土也用作桥墩。此外，CFTs可用于加固震区的混凝土柱。CFT结构构件与同等的钢、钢筋混凝土或钢-钢筋混凝土构件相比，具有许多明显的优点。pvc和混凝土在截面上的朝向优化了截面的强度和刚度。聚氯乙烯位于外周长，在那里它执行最有效的张力和抗弯矩。此外，CFT的刚度大大增强，因为pvc具有比混凝土更大的弹性模量，位于离质心最远的地方，在那里它对转动惯量的贡献最大。
Poly Vinyl Chloride (PVC) tubes filled with concrete are axially loaded until failure of the specimen to investigate their load carrying capacity. Twenty four specimens are cast and tested, out of which twelve are of PVC pipe and twelve of steel tube. PVC tubes are of dia. 152.4 mm, thickness 5mm with effective length of 500 mm and 600 mm. One of the main advantages in the interaction between PVC tube and concrete is, local buckling and PVC tube delayed by restraint of concrete and strength of concrete is increased by the confining effect of PVC tube . In current international practice, concrete filled tube (CFT) columns are used in the primary lateral resistance systems of both braced and unbraced building structures. CFTs are also used as bridge piers. Moreover, CFTs may be utilized for retrofitting purposes for strengthening concrete columns in earthquake zones. The CFT structural member has a number of distinct advantages over an equivalent steel, reinforced concrete, or steel-reinforced concrete member. The orientation of the pvc and concrete in the cross section optimizes the strength and stiffness of the section. The pvc lies at the outer perimeter where it performs most effectively in tension and in resisting bending moment. Also, the stiffness of the CFT is greatly enhanced because the pvc, which has a greater modulus of elasticity than the concrete, is situated farthest from the centroid, where it makes the greatest contribution to the moment of inertia.