Finite element study on pinning retrofitting technique of masonry walls with opening subjected to in-plane shear load

• Autorzy: Shrestha K. , Nagae T. , Araki Y.
• Języki publikacji: EN

Abstrakty

EN

The paper focuses on finite element (FE) modelling of in-plane response of retrofitted masonry walls when subjected to quasi-static in-plane cyclic loading. The retrofit technique involves inserting inclined and horizontal stainless steel bars, already practiced in several historical masonry constructions in Japan. The strength of the pinning technique is ease of construction and it maintains the original appearance of the URM walls. This paper presents a 2D FE model for the retrofitted masonry walls, where continuum elements represent brick units, interface elements represent brick unit/mortar interface, and truss elements represent reinforcing bars. FE model with the proposed simplified equivalent vertical bar model, to represent the inclined inserted reinforcing bars, is validated by comparisons with the experimental results. It was found from the experimental and numerical results that retrofitted specimens showed substantial increment in both strength and ductility and showcased the applicability of the pinning retrofitting technique for historical masonry constructions.

PL

W artykule skoncentrowano się na modelowaniu elementami skończonymi naprawionych ścian murowych poddanych quasi statycznemu, płaskiemu obciążeniu cyklicznemu. Technika naprawy, zastosowana w Japonii w różnych obiektach historycznych o konstrukcji murowej, wymaga wkładania ukośnych i poziomych nierdzewnych prętów stalowych. Zaletą takiej techniki kołkowania jest łatwość wykonania oraz zachowanie niezmienionego wyglądu ścian bez zbrojenia. W artykule przedstawiono dwuwymiarowy model elementów skończonych dla naprawianych ścian murowych, gdzie elementy ciągłe przedstawiają poszczególne cegły, elementy kontaktowe odwzorowują powierzchnię styku cegły i zaprawy, a elementy kratownicowe przedstawiają pręty zbrojenia. Model elementów skończonych z zaproponowanym uproszczeniem zastąpienia prętów ukośnych elementami pionowymi został zweryfikowany przez porównanie z wynikami badań doświadczalnych. Na podstawie wyników badań doświadczalnych i numerycznych stwierdzono, że naprawione elementy wykazują znaczący wzrost wytrzymałości i plastyczności, co potwierdza możliwość stosowania tej metody naprawy w historycznych obiektach o konstrukcji murowej.

Słowa kluczowe

EN

masonry; finite element modelling; performance assessment

PL

kamieniarstwo; modelowanie elementów skończonych; ocena wyników

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2011
• Tom: Vol. 4, no. 4
• Strony: 81--96
• Opis fizyczny: Bibliogr. 20 poz.

Twórcy

autor

Shrestha K.

autor

Nagae T.

autor

Araki Y.

• Department of Architecture and Architectural Engineering, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8540, Japan,

Bibliografia

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