Nguyên nhân hư hỏng dầm bt dul của bê tông châu thới và phương pháp sửa chữa tăng cường

• Tác giả: Giang Lam Tô, Văn Thành Vũ
• Ngôn ngữ: vie
• Ký hiệu phân loại: 691 Building materials
• Thông tin xuất bản: Cầu đường việt nam, 2012
• Mô tả vật lý: 39-45
• Bộ sưu tập: Metadata
• ID: 481752

Tóm tắt

Post tension prestressed beams with primastic T or double T cross sections were used in many bridges built in the South of Vietnam in Vietnam War time. After more than 40 years in service, these bridges are damaged or deteriorated seversly. Some typical damages are the failure of transverse cable, bending and shear cracks and cracks along flange and web of beams. Some researchs were performed to propose solutions to repair and strengthen this type of bridge but there is no research about the cracks along flange and web of beams. This paper presents studies of causes of the cracks and solutions to repair and strengthen this type of bridge by using epoxy injection and FRP wrapping.