Enhancement of multi-scale integrated analysis for real concrete structure

为了通过多尺度综合分析模拟真实混凝土结构，增强了分析平台。该分析平台成功地再现了PC高架桥的大挠度。分析结果表明，钢材约束和上下翼缘热力状态引起的随时间变化的体积变化差异是产生大挠度的关键。在此基础上，提出了采用上下翼缘不同的混凝土特性来控制时变挠度的设计思想，并验证了其有效性。该系统还模拟了结构性能随腐蚀的变化情况。结果表明，由于破坏模式随劣化而转移，结构性能随时间的退化比预期的要快。

In order to simulate real concrete structures in full scale by the multi-scale integrated analysis, the analytical platform is enhanced. The excessive deflection of PC viaducts are reproduced successfully by this analytical platform. The analytical results show that the difference of time-dependent volumetric change caused by steel confinement and thermo-dynamical state between upper and bottom flange is the key of excessive deflection. Based on this fact, new design concept that giving different concrete property between upper and bottom flange to control the time dependent deflection is proposed, and its validity is confirmed. The change of structural performance with corrosion is also simulated by the system. The result shows that the degradation of structural performance with time is faster than expected because of the failure mode shift with deterioration.