针对常见的受约束混凝土梁易收缩开裂、并导致钢筋腐蚀的问题，提出了一种新型FRP增强膨胀混凝土组合梁。该组合结构通过在梁试件受压区和受拉区布置不等的纤维，充分利用混凝土的膨胀和FRP的外部约束，产生剩余偏心自应力，从而延迟和减少开裂、消除腐蚀。本项目将在前期研究的基础上，通过试验测试和理论分析，探讨该组合结构的膨胀应变、收缩应变、长期预应力损失、预拱度、开裂荷载、最终破坏荷载、裂缝宽度及发展以及破坏形式等力学性能。此项研究对揭示新型FRP-膨胀混凝土组合系统由偏心自应力受纯弯矩力作用下的力学行为规律有重要意义，可对未来的实际工程应用提供可靠的试验结果，理论分析和技术支持。

To solve the problems of concrete cracking due to restrained shrinkage and steel corrosion, an innovatively designed hybrid FRP reinforced expansive concrete structural beam was put forward. By laying out FRP with different stiffness at compression and tension region, the expansion property of expansive concrete and reinforcement and confinement of FRP are fully utilized to achieve residule eccentric self-prestress to delay cracking and eliminate corrosion in the hybrid system.Based on previous research outcome, this study will investigate the mechnical properties of the proposed structural beams based on experiment test and theoretical analysis, including expansion strain,shrinkage strain, long-term prestress loss, camber, cracking load, ultimate load, crack width and development and failure mode. The data generated from this research will contribute to the understanding of the mechanical properties of FRP-expansive concrete beams under eccentric self-prestress. It will provide reliable experiment results, theoretical analysis and technical support for the future application of FRP reinforced expansive concrete structural system.