Abstract
The Hyogoken Nanbu earthquake (Kobe earthquake) that occurred on January 17. 1995, caused extensive and severe damages to a large number of buildings in Kobe city area. After the earthquake many steel structures were constructed using frame welded joint of welded construction and welded base. However, the capacity of these weld joints to absorb energy during earthquakes is small. For that reason, it is believed that in the design of steel structures that use welded joints, strong earthquake resistant characteristics must be provided in special for those joints of the steel welded bases. Moreover, these weld joints have little capacity to absorb energy during earthquakes. Therefore, for designing steel structures incorporating welded joints, strong earthquake-resistance characteristics must be specially provided for those joints of steel welded bases. Furthermore, structural monitoring will be necessary. Using simple dynamic measurements and simulations, this report evaluates the resistance and displacement characteristics of fillet welded construction by piezoelectric joint sensors.
Highlights
Japan's social capital stock was accumulated and concentrated during its era of high economic growth
The output result of the piezo limit sensor is displayed on the loop curve of the load and displacement relation obtained by numerical analysis
Considering results obtained for the applied force and sensor output 3, the figure and displacement and sensor output Figure 4 by the mounting test, based on the maximum output result of the sensor, the displacement was measured from 8 mm to 10 mm, respectively, when the applied force was 12 kN to 15 kN
Summary
Japan's social capital stock was accumulated and concentrated during its era of high economic growth. Many steel-framed buildings in Japan use welding or bolting as a joining method. At present, no report describes monitoring of structural integrity by long-term precise measurements concentrated only on the joint part [4]. This is true for other economically developed countries that have experienced strong earthquakes. 112 Nobuhiro Shimoi et al.: Comparison of Displacement Measurements and Simulation on Fillet Weld of Steel Column Base constructed a monitoring system able to measure structural soundness "," "inexpensively," and "over a long-term" through autonomous damage inspection of welded joints of steel structures, and by using sensor output. We investigated the design and measurement technology of a piezoelectric joint sensor that enables displacement prediction [5]
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