FRP/RC预应力杂交柱在轴向荷载作用下的应力-应变关系分析

由于FRP包裹混凝土柱能够显著提高柱的抗压强度 ,杂交柱已成为土木工程修复加固领域的新热点。但复合材料只有在混凝土的横向变形较大时 ,才能发挥应有作用。如何使高强复合材料和混凝土更好地协同工作 ,充分发挥两者的特性 ,就成为制约杂交柱结构应用的一个关键问题 ,给复合材料施加预应力无疑是解决这一问题的有效方法。针对预应力杂交柱利用增量法提出了新的分析模型 ,进行了参数分析 ,得出了适用于预应力杂交柱的计算方法

STRESS-STRAIN ANALYSIS OF AXIALLY LOADED PRESTRESSED FRP-JACKETED CONCRETE COLUMNS

Because FRP jacketed concrete columns can greatly increase columns intensity of pressure,they have become the new hotspot in the structure reinforced field.But composite materials can exert their effect only if concrete has big transmogrifications.So how to make high strength composite materials and concrete cooperating well becomes a key question.Prestressing FRP is an effective way to solve this problem.A new analytical model by using incremental approach is given here,the equation of prestressed FRP jacketed concrete columns is gotten.