Shrinkage and temperature cracking in FRP reinforced liquid containing structures

温度变化引起的混凝土开裂是包括底部约束墙在内的结构中普遍存在的问题。这种类型的裂缝通常发生在具有刚性互连部件的结构中，这些部件在其基础中的混凝土已经硬化之后浇筑，例如包含液体的结构。墙体和基础之间的变形差异会导致收缩开裂。钢筋混凝土结构的开裂降低了结构的整体性，引起结构的劣化和使用性能问题。因此，结构的设计应防止裂缝的发生，特别是对于液体保持结构。虽然已经证明完全消除裂缝几乎是不可能的，但提供足够量的钢筋将使裂缝宽度减小到适当的水平。设计指南建议提供配筋率限制，以控制裂缝宽度，但其指南非常笼统，考虑的因素非常有限。本研究主要探讨底部约束钢筋混凝土（RC）墙纤维增强聚合物增强受到温度变化和收缩开裂的行为。在本研究中将使用有限元建模。根据研究结果，将建议将满足裂缝限制的钢筋数量和百分比纳入建筑规范。

Concrete cracking due to temperature change is a widespread problem in structures including base restrained walls. This type of cracks usually occurs in structures with rigidly interconnected parts which are cast after the concrete in their foundations have hardened, such as liquid containing structures. The difference in deformations between the wall and the foundation will cause shrinkage cracking. Cracking in reinforced concrete structures reduces the structure's integrity, cause deterioration and serviceability problems. Therefore, the structure should be designed in a way to prevent the cracks to occur especially for liquid retaining structures. Although it has been proven that it is almost impossible to completely eliminate the cracking, providing an adequate amount of reinforcement will reduce the crack width to an appropriate level. Design guides recommend reinforcement ratio limits to provide in order to control the crack width but their guidelines are very general and consider very limited factors. This study investigates the behavior of base restrained reinforced concrete (RC) walls reinforced with fiber reinforced polymers subjected to temperature change and shrinkage cracking. The finite element modeling will be used in this investigation. Based on the results of the study, the amount and percentage of reinforcement to satisfy the cracking limits will be recommended for inclusion into the building codes.