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《结构与土木工程前沿(英文)》 >> 2009年 第3卷 第1期 doi: 10.1007/s11709-009-0012-7

Moment-curvature relationship of FRP-concrete-steel double-skin tubular members

Key Laboratory for Structural Engineering and Vibration of Ministry of Education, Department of Civil Engineering, Tsinghua University, Beijing 100084, China

发布日期: 2009-03-05

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摘要

Tests were conducted on 3 specimens to study the flexural behavior of fiber reinforced polymer (FRP)-concrete-steel double-skin tubular members (DSTMs). The strip method was used to calculate the section moment-curvature curves of the 3 specimens and 12 models. A theoretical formula is presented for the flexural strength of DSTMs. The test results show that the tension zone of the specimen FRP tubes was in hoop compression while the compression zone was in hoop tension. The load-carrying capacity did not decrease even when the mid-span deflection reached about 1/24 of the span length. The tests, simulation and theoretical analysis resulted in a simplified formula for the flexural strength of DSTMs and a tri-linear moment-curvature model was expressed as a function of the section bending stiffness for DSTMs.

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