12th National Conference on Earthquake Engineering(12NCEE)
巻, 号, ページ
出版年月
2022年6月27日
出版者
和文:
英文:
Earthquake Engineering Research Institute
会議名称
和文:
英文:
12th National Conference on Earthquake Engineering(12NCEE)
開催地
和文:
英文:
Salt Lake City
アブストラクト
Fiber-section-based analysis methods are commonly used to simulate the response of concrete-filled steel tube (CFST) members, as a balance between accuracy and computational efficiency. These methods require stress-strain models that can implicitly capture the effects of the interaction between the tube and concrete. Many such models have been proposed, which include all/some of the salient features of CFST. Most of these models were developed based on the results of uniaxially-loaded stub columns-mostly small-diameter CFSTs with relatively small diameter-to-thickness (D/t) ratios. Accordingly, there is a need to evaluate the suitability of the stress-strain models to calculate the moment capacity of CFST piles, which have large diameters (D>300mm) and large D/t(>50). Herein, we compare the moment capacity calculated using seven commonly used stress-strain models with the test results from literature. To this end, a database of flexural tests of 51 large-diameter CFSTs is collated. Moment capacity obtained from the test is compared with the capacity calculated using the models. Results show that all seven models give conservative estimates of moment capacity, and the model proposed by Sakino et al. (2004) gives the most accurate estimates. These findings are expected to help designers involved in the modeling of CFST piles.
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