确定构件延性的方法综述

J. H. Ling, Yong Tat Lim, E. Jusli
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引用次数: 1

摘要

延性对保证结构的安全起着至关重要的作用,因为延性的不足可能导致突然和脆性破坏。尽管它的重要性,没有明确的方法来确定,导致在选择适当的技术不一致和混乱。对结构延性的错误判断可能会带来灾难性的后果。因此,本研究考察了几项初步研究,并确定了21种计算延性指标的方法。这些指标分为三种类型,即常规、基于驱替和基于能源。常规延性指标一般适用于钢结构构件,基于变形的延性指标适用于frp增强构件,基于能量的延性指标适用于抗震和静载结构。传统的延性指标是针对延性钢筋的,而基于位移和基于能量的延性指标则适用于延性和非延性钢筋。然而,不同的计算方法会导致计算出的延性,特别是涉及第一次裂缝的延性,以及荷载系数的显著差异,从而导致确保结构安全的不同延性要求。另外,并不是所有的方法都是明确的,避免不加区分地将需求从一种方法应用到另一种方法是至关重要的。
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Methods to Determine Ductility of Structural Members: A Review
Ductility plays a crucial role in ensuring the safety of a structure, as its inadequacy can lead to sudden and brittle failure. Despite its significance, there is no explicit method for determining, leading to inconsistency and confusion in selecting appropriate techniques. Misjudging a structure’s ductile behaviour can have catastrophic consequences. Therefore, this study examined several preliminary studies and identified twenty-one methods for computing ductility indices. These indices were categorized into three types, namely conventional, displacement-based, and energy-based. The conventional ductility indices are commonly applied to steel-reinforced members, deformation-based ductility indices to FRP-reinforced members, and energy-based ductility indices to earthquake-resistant and static-load structures. Conventional ductility indices are specific to ductile reinforcements, while displacement-based and energy-based ductility indices apply to both ductile and non-ductile reinforcements. However, different calculation methods can lead to significant variations in the computed ductility, particularly for those involving the first crack, and load factor, thereby leading to different ductility requirements for ensuring structural safety. Additionally, not all methods are explicit, and it is crucial to avoid indiscriminately applying requirements from one method to another.
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来源期刊
自引率
0.00%
发文量
20
审稿时长
15 weeks
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