Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO DIVISION I 3.8:1996
• Năm ban hành / Publication date: 1996
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Impact
• Số trang / Page: 2

Phạm vi áp dụng / Scope of standard

Application: Highway Live Loads shall be
increased for those structural elements in Group A, below, to allow
for dynamic, vibratory and impact effects. Impact allowances shall
not be applied to items in Group B. It is intended that impact be
included as part of the loads transferred from superstructure to
substructure, but shall not be included in loads transferred to
footings nor to those parts of piles or columns that are below
ground.

Group A-Impact shall be included.

(1) Superstructure, including legs of rigid frames.

(2) Piers, (with or without bearings regardless of type)
excluding footings and those portions below the ground line.

(3) The portions above the ground line of concrete or steel
piles that support the superstructure.

Group B-Impact shall not be included.

(1) Abutments, retaining walls, piles except as specified in
3.8.1.1 (3).

(2) Foundation pressures and footings.

(3) Timber structures.

(4) Sidewalk loads.

(5) Culverts and structures having 3 feet or more cover.