Welding intensity assessment of pyroclastic units based on engineering quality requirements

Selçuk, Levent; Beyaz, Turgay

doi:10.1007/s12517-021-06776-2

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Material properties are presented in Table 2. The properties of the masonry materials were determined considering standards of masonry [72][73][74][75][76], recent studies on welded tuff stone masonry [77][78][79][80][81][82], on brick masonry [83,84] and on concrete block masonry [85][86][87]. It is added that the modulus of elasticity of the masonry materials was determined, considering that the models showed close eigenvalues to the real structures.…”

Section: Numerical Simulation 51 Description Of the Numerical Modelsmentioning

confidence: 99%

Dynamic Identification Tests of 20th Century Historic Masonry Buildings in Japan

et al. 2021

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This paper discussed the application of health monitoring systems to 20th-century historic buildings. Natural disasters are major threats to monuments. They are often seismically vulnerable and require interventions. However, taking into account their historic and cultural values, it is appropriate to observe long-term behaviour before making a decision on intervention schemes. To this aim, health monitoring is considered an effective approach. In recent years, MEMS (micro-electromechanical systems) accelerometers have been attracting attention for their convenience and efficacy. Nonetheless, the reliability of MEMS accelerometers still needs to be examined for the monitoring of monuments as sufficient research contributions have not been made. This paper presented two case studies that were monitored by means of MEMS accelerometers. They were masonry structures positioned in seismic-prone regions in Japan. A number of earthquakes were detected by the accelerometers during one year of monitoring. To examine the accuracy of the adopted MEMS accelerometers, dynamic identification tests were conducted using high-sensitivity strain-gauge accelerometers and servo velocity meters. Based on responses obtained from the tests, numerical simulation was performed. Nonlinear static analysis was performed. The numerical simulation permitted the comparison of reliability among sensors and test types. This paper provided suggestions for the dynamic identification tests of heritage structures.

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Section: Numerical Simulation 51 Description Of the Numerical Modelsmentioning

confidence: 99%

Dynamic Identification Tests of 20th Century Historic Masonry Buildings in Japan

et al. 2021

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The emission of natural harmful particulate matters by wind erosion and possible impact areas, Cappadocia province, Central Anatolia, Turkey

Aydar

Akkaș

2021

Bull Eng Geol Environ

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Particulate matters (PM) are atmospheric aerosols that can derive from anthropogenic and natural sources, directly affecting air quality. Particularly, fine grain-sized particulate matters (PM10, PM2.5, and ultrafine PM-UFPM) can be carried by winds. Such mineral dust can cause significant respiratory diseases. Furthermore, the alteration of the volcanic glass causes the crystallization of abundant erionite minerals in the Cappadocian rhyolitic ignimbrites. Malignant mesothelioma cases have been known for many years in the Cappadocia region, and exposure to acicular-fibrous erionite minerals in the natural stones of which village houses are built is shown as the primary cause (Indoor effect). The state constructed new buildings to prevent indoor exposure of the villagers since more than 50% of the inhabitants of some villages had lung cancer due to indoor exposure. Then the villages such as Tuzköy and Karain were moved to their new places. This study emphasizes mineralogically hazardous substances such as amorphous and crystalline silica and the cancerogenic erionite minerals based on scanning electron microscopy and XRD works. The geological units containing these minerals are open to wind erosion, as demonstrated by the Böhme abrasion resistance tests. Besides, we show that the relocation of villages probably has a limited effect in solving the problem. In addition, our HYSPLIT particle transport models determining the possible impact areas show that the issue of outdoor exposure has also become critical. With the dispersion of harmful substances into the atmosphere, humans are subject to short-and long-term exposures to those toxic substances.

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A new quantitative welding degree classification for ignimbrites

et al. 2023

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Welding intensity assessment of pyroclastic units based on engineering quality requirements

Cited by 3 publications

References 23 publications

Dynamic Identification Tests of 20th Century Historic Masonry Buildings in Japan

Dynamic Identification Tests of 20th Century Historic Masonry Buildings in Japan

The emission of natural harmful particulate matters by wind erosion and possible impact areas, Cappadocia province, Central Anatolia, Turkey

A new quantitative welding degree classification for ignimbrites

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