Shaking table tests on a 5-storey unreinforced masonry structure strengthened by ultra-high ductile cementitious composites

Seismic fragility analysis of masonry structures considering the effect of mainshock-aftershock sequences

“…1) to verify the proposed approach for IDR demand of masonry structures. The shake table tests [41] were adopted to obtain IDR of the 1/4-scaled model, and the calculated results are compared with those calculated by the proposed method, as shown in Table 4. The measured natural period of the 1/4-scaled model is 0.126s and the similarity coefficient is 3.162:1, so the natural period of the BSM is 0.397s.…”

“…The measured average compressive strength of masonry and mortar are 3.3MPa and 1.5MPa, respectively. The specific value of other material strengths can be referred to [41]. The failure of the element is determined by the maximum strain and stress rather than cumulative damage.…”

Seismic reinforcement effect and vibration test of externally attached substructures in a selected Japan school building

“…The dynamic characteristics of the structure can directly reflect the changes in characteristics before and after reinforcement [15]. Researchers evaluated the effects of reinforcement on structural dynamic characteristics based on vibration frequency and damping characteristics [16][17][18]. Constant micro-motion test was conducted using a wireless vibration test system before and after the implementation of the seismic reinforcement project.…”