Tên bài báo:

Pushover experiment and numerical analyses on CFRP-retrofit concrete shear walls with different aspect ratios
Tác giả:
Lê Nguyên Khương
Tham gia cùng:
Tạp chí:
Composite Structures
Năm xuất bản:
Từ trang 403 đến trang 418
Lĩnh vực:
Kỹ thuật xây dựng công trình giao thông
Phạm vi:
Quốc tế

Tóm tắt:

The efficiency of shear walls to sustain the earthquake loads mainly depends on the aspect ratio, the vertical load, and the ratios of longitudinal and transverse reinforcement. In this paper, two lightly reinforced concrete walls have been experimentally and numerically investigate with an aspect ratio equal to 0.67 (short wall) and 2.5 (slender wall). Different retrofitting strategies have been considered using Carbon-Fiber-Reinforced-Polymer (CFRP) materials. Pushover analyses have been carried out using two advanced numerical approaches for the concrete modeling: the first one adopts a 2D plane stress approach with a local concrete model based on the smeared fixed crack approach and a classical regularization technique based on the fracture energy; the second investigates a coupled elastoplastic damage model using local approach in 2D and 3D simulations. The numerical results in terms of the load–displacements are very consistent with experimental data. The observed failure modes and crack patterns are satisfactorily reproduced for both walls, without or with the CFRP strengthening.

Từ khóa:

RC walls CFRP retrofit Pushover tests FE analyses Smeared fixed crack approach Coupled elastoplastic damage approach
Thông tin tác giả
Lê Nguyên Khương

Lê Nguyên Khương

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