Phân tích kết cấu tường kép nhà nhiều tầng có thiết bị tiêu tán năng lượng chịu động đất

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Tác giả: HẢI QUANG NGUYỄN, TIẾN CHƯƠNG NGUYỄN, THU HIỀN PHẠM

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2024

Mô tả vật lý: tr.76

Bộ sưu tập: Metadata

ID: 451012

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Bài báo phân tích kết cấu tường kép có gắn thiết bị tiêu tán năng lượng chịu tác động của các trận động đất khác nhau nhằm làm rõ tính hiệu quả giảm chấn của giải pháp sử dụng thiết bị tiêu tán năng lượng. Để mô hình tính toán tường kép có thiết bị tiêu tán năng lượng, nghiên cứu sử dụng mô hình khung theo phương pháp phần tử hữu hạn. Các thiết bị tiêu tán năng lượng được gắn vào đoạn giữa của dầm nối, làm việc theo quy luật ứng xử trễ phi tuyến giữa lực tác dụng và biến dạng trượt. Phân tích kết cấu tường kép có gắn thiết bị như trên trong dầm, bài báo sử dụng chương trình Tính toán khung gắn thiết bị giảm chấn được xây dựng dựa trên nền tảng ngôn ngữ lập trình Matlab phiên bản R2017b. Kết quả phân tích kết cấu tường kép 30 tầng, gắn thiết bị tiêu tán năng lượng tại tất cả các tầng, với 4 trận động đất có đặc tính khác nhau cho thấy giải pháp sử dụng thiết bị tiêu tán năng lượng đạt hiệu quả giảm chấn cao khi công trình chịu tác động của động đất. Thông qua các thông số khảo sát: chuyển vị ngang tại đỉnh, gia tốc tại đỉnh và chuyển vị ngang tương đối theo tầng, kết quả khảo sát cho thấy mức độ giảm của các giá trị khảo sát so sánh giữa trường hợp không đặt thiết bị tiêu tán năng lượng và đặt 30 thiết bị đạt từ 26 % đến 46 %. Từ khóa: Tường kép
dầm nối
thiết bị tiêu tán năng lượng
thiết kế kháng chấn.This paper analyzes coupled shear wall structure with energy dissipation devices that are affected by different earthquakes to clarify the damping effectiveness of the solution using energy dissipation devices. To model the coupled shear wall with energy dissipation devices, the study uses the equivalent frame model according to the finite element method. Energy dissipation devices are attached to the middle section of the coupling beam, working according to the law of nonlinear hysteresis between the shear force and the relative displacement. To analyze the coupled shear wall structure with the above device assigned in the beam, the coupled shear wall calculation algorithm and the Analysis of the Frame with Damper (TTKGC) program are built based on the Matlab version of the programming language platform R2017b. Results of analysis of a 30-story coupled shear wall structure, with energy dissipation devices installed on all floors, with 4 earthquakes with different characteristics, show that the solution of using energy dissipation devices is effective in reducing high vibration when the structure is affected by an earthquake. Through the survey parameters: peak lateral displacement, peak floor acceleration, interstory drift ratio, the analysis results show the decrease in survey values compared to the case where no energy dissipation devices and placing 30 devices reached from 26 % to 46 %. Keywords: Coupled shear wall
coupling beam
energy dissipation device
seismic design.

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