Seismic Behaviour of a 20th Century Heritage Structure Built of Welded Tuff Masonry and Timber Frames

ABSTRACT

The paper discusses heritage structures built of welded tuff masonry and timber frames. Such timber-masonry composite structures were built in Japan around the early 20th century. Timber frames are composed of studs and girts. The studs are coupled by penetrating girts via nuki joints. The studs are connected to masonry walls by means of L-shaped wrought iron pegs. In this paper, a warehouse is considered as the case study. Pull-out and shear tests were conducted to examine the performance of joints between a masonry wall and stud. A focus was given to the contribution of iron pegs. A microtremor test was performed on the case study. Based on these experimental activities, seismic analysis was carried out by numerical approach. Attention was paid to the discretisation of joint behaviour between masonry walls and timber studs. The paper introduces structurally a unique heritage building and discusses its seismic behaviour, focusing on joint behaviour derived from iron pegs and nuki joints. Findings are taken advantage of for the seismic analysis of historical composite structures.

KEYWORDS:

• Composite structures
• finite element analysis
• nonlinear dynamic analysis
• nuki joints
• timber
• welded-tuff masonry

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Promotion of Science (Tokyo) under the Promotion of Joint International Research [18KK0124].