Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO LRFDFRP:2012
• Năm ban hành / Publication date: 2012
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: LRFD GUIDE SPECIFICATIONS FOR DESIGN OF CONCRETE-FILLED FRP TUBES FOR FLEXURAL AND AXIAL MEMBERS
• Số trang / Page: 44

Phạm vi áp dụng / Scope of standard

These Specifications present provisions for the analysis and
design of concrete-filled fiber-reinforced polymer (FRP) tubes
(CFFT) for use as structural components in bridges. Design
methodology presented in this specification allows CFFTs to be
designed as flexural members, axial compression members, or members
subjected to combined flexural and axial compression, in addition
to shear. CFFT bridge components may include beams, arches,
columns, and piles.

These Specifications are not intended to supplant proper
training or the exercise of judgment by the Design Professional,
and state only the minimum requirements necessary to provide public
safety. The Owner or the Design Professional may require the
sophistication of the design or the quality of materials and
construction, or both, to be higher than the minimum
requirements.

The Design Professional shall be familiar with the provisions of
the AASHTO LRFD Bridge Design Specifications,
6^th Edition (AASHTO, 2012), hereafter referred to
as "AASHTO LRFD," and the latest interim revisions, as well as with
the design of conventional reinforced concrete structures and
structures exposed to earth loading.

The commentary directs attention to other documents that provide
suggestions for carrying out the requirements and intent of these
Specifications. However, those documents and this commentary are
not intended to be a part of these Specifications.

FRP materials have emerged as an alternative material to steel
reinforcement for concrete structures. They offer advantages over
steel reinforcement due to their noncorrosive nature and
nonconductive behavior. FRP is a also a versatile material that can
be produced in many forms such as reinforcing bars, grids, rigid
plates, flexible sheets, and several structural shapes, including
tubes. This specification is focused on one application of FRP in
the form of tubes used as structural stay-in-place forms filled
with concrete [Fardis and Khalili (1981), Nanni and Bradford
(1995), Mirmiran and Shahawy (1996), Davol (1998), Burgueño (1999),
Fam (2000), Fam and Rizkalla (2001), Fam and Rizkalla (2002)]. Due
to differences in the physical and mechanical behavior of FRP
materials as opposed to steel, particularly when used as
stay-in-place structural forms, unique guidance on the engineering
and construction of bridge components using this technology is
needed.