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劉明學^1,2   錢稼茹¹
（1 清華大學土木工程系  北京100084； 2 中國電子工程設計院 北京100840）

[摘要] 為建立FRP-混凝土-鋼雙壁空心管（簡稱雙壁空心管）截面軸力-彎矩相關衄線方程，推導了雙壁空心管壓彎構件截面承載力計算公式，計算結果與試驗結果符合較好。對構件的纖維特征值、內層鋼管強度和含鋼率等因素對雙壁空心管截面軸力-彎矩關系的影響進行了分析?；诶碚摲治龊驮囼灲Y果，提出了雙壁空心管截面軸力-彎矩相關鹽線方程。
[關鍵詞] FRP-混凝土-鋼雙壁空心管；壓彎構件；截面承載力；N-M 相關曲線

    Study on Axial Force-moment Interaction Relationship of FRP- concrete-steel Double-skin Tubes
    Liu Mingxue^l'2,  Qian Jiaru¹
    (1 Tsinghua University, Beijing 100084,China; 2 Beijing Space-Time Creator Architecture Design Co.  Ltd.,  Beijing 100840, China)

Abstract:  ln order to develop the axial force-moment ( N-M) interaction relationship of FRP-concrete-steel double-skin tubes ( DSTs),  formulas of calculating strength of DSTs under compressive force and moment are derived. The calculated results agree well with the test results. Influences of fiber characteristic value,  steel tube strength and steel ratio on the axial force-moment interaction relationship of DSTs are investigated. Based on the theoretical analysis and test results, the N-M interaction relationship ecruations of DSTs are developed.
Keywords:  FRP-concrete-steel double-skin tube;  compression-bending element;  section strength;  N-M interaction equation