Abstract
Indirect test method of installing vibrating wire strain gauges as sensors in outer surface of steel tube rib is adopted to carry out the research of concrete-filled steel tube (CFST) self pre-stress test for a half-through CFST arch bridge with a main span of 240m. The results show that indirect test method is a practical approach for self pre-stress test, and the measured value of self pre-stress from this method is much smaller than that of being theoretically calculated by concrete free expansion ratio.
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