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首页> 外文会议>SP-228; International Symposium on Utilization of High-Strength/High-Performance Concrete vol.1; 20050620-24; Washington,DC(US) >Behavior and Design of HSC Members Subjected to Axial Compression and Flexure
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Behavior and Design of HSC Members Subjected to Axial Compression and Flexure

机译：承受轴向压缩和挠曲的HSC构件的行为和设计

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摘要

This paper identifies the fundamental design issues related to the behavior of high-strength concrete (HSC) members with compressive strengths up to 124 MPa (18 ksi) subjected to axial compression loads. The findings are based on critical assessment and synthesis of available data, the experiences of bridge owners, concrete fabricators, and current bridge design codes from North America, Europe, Australia, and Asia. The paper discusses the various factors believed to affect the design and behavior of HSC compression members, including the fundamental properties of concrete, member geometry, support conditions, main and lateral reinforcement, and type of construction. The significance of modeling of the stress-block, potential early spalling of concrete and reliability issues of HSC columns is also discussed. This paper represents the current efforts by the authors to recommend revisions to the AASHTO-LRFD Bridge Design Specifications, which currently limits the compressive strength of concrete to 69 MPa (10 ksi).
机译：本文确定了与承受轴向压缩载荷的抗压强度高达124 MPa（18 ksi）的高强度混凝土（HSC）构件的性能有关的基本设计问题。调查结果基于对现有数据的严格评估和综合，桥梁所有者，混凝土制造商的经验以及来自北美，欧洲，澳大利亚和亚洲的当前桥梁设计规范。本文讨论了被认为会影响HSC压缩构件设计和性能的各种因素，包括混凝土的基本性能，构件的几何形状，支撑条件，主要和横向钢筋以及建筑类型。还讨论了应力块建模，混凝土潜在的早期剥落以及HSC柱的可靠性问题的重要性。本文代表作者当前为建议修订AASHTO-LRFD桥梁设计规范所做的努力，该规范目前将混凝土的抗压强度限制为69 MPa（10 ksi）。

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