Ảnh hưởng của vị trí và bề rộng của bản CFRP đến cột bê tông cốt thép tiết diện vuông được gia cường bởi bản CFRP dưới tác dụng của tải trọng lệch tâm
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Author
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Anh Duc MaiThe University of Danang - University of Science and Technology, Danang, VietnamNgoc Duong VoThe University of Danang - University of Science and Technology, Danang, VietnamVan Huong NguyenThe University of Danang - University of Science and Technology, Danang, VietnamPhuoc Dung TranCentral College of Transport V, Danang, VietnamVan Tuoi NguyenCentral College of Transport V, Danang, Vietnam
Từ khóa:
Tóm tắt
Hiệu quả của vật liệu vải sợi FRP trong gia cường kết cấu bê tông cốt thép (SRC) đã được thừa nhận rộng rãi. Tuy nhiên, các nghiên cứu về sự làm việc của cột SRC tiết diện vuông (SSRC) gia cường gián đoạn bởi bản CFRP còn rất hạn chế. Nghiên cứu này so sánh sự làm việc của cột SSRC không gia cường và có gia cường không liên tục bởi các dải bản CFRP có bề rộng khác nhau nhằm đánh giá sự ảnh hưởng của bề rộng bản CFRP đối với ứng xử của cột SSRC. Kết quả nghiên cứu cho thấy rằng, các bản CFRP làm gia tăng đáng kể khả năng chịu tải và gia tăng lớn độ ổn định của cột SSRC. Cột SSRC được gia cường bởi bản CFRP đặt giữa cốt thép đai có khả năng chịu tải và có độ ổn định lớn hơn cột SSRC gia cường bởi bản CFRP không đặt giữa cốt thép đai. Nghiên cứu này cũng xây dựng đường cong phá hoại của cột SSRC gia cường bởi bản CFRP dựa trên 02 tiêu chuẩn quốc tế là FIB-Bulletin-14 và ACI-440.2R-17.
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