P-ECC-RC组合柱偏心受压力学性能仿真分析
Simulation Analysis of the Mechanical Properties of P-ECC-RC Composite Columns under Eccentric Compression

工程水泥基复合材料(Engineered Cementitious Composite, ECC)具有卓越的韧性和抗裂性能，然而其存在现场浇筑困难、造价高等问题。鉴于此，本文提出了一种带ECC壳的装配式混凝土组合柱(P-ECC-RC)。首先建立了其数值仿真分析模型，并通过既有试验验证；进而开展了参数影响分析，探究了ECC强度和纵筋配筋率对P-ECC-RC的偏压力学性能的影响。研究结果表明：对于组合柱，峰值荷载随着偏心距的增加而显著降低，但延性提升；ECC强度增加对组合柱的承载能力有正向影响，但延性会有所降低；增加纵向钢筋配筋率可有效增加组合柱的承载能力以及延性。
Engineered Cementitious Composite (ECC) has excellent toughness and crack resistance, but it has problems such as difficulty in on-site casting and high cost. In view of this, this paper proposes a Prefabricated-Engineered Cementitious Composites-Reinforced Concrete (P-ECC-RC). Firstly, a numerical simulation analysis model is established and verified by existing experiments. Then, parameter influence analysis is carried out to explore the influence of ECC strength and longitudinal reinforcement ratio on the bias mechanical properties of P-ECC-RC. The research results show that for composite columns, the peak load significantly decreases with the increase of eccentricity, but the ductility increases. The increase of ECC strength has a positive impact on the bearing capacity of composite columns, but the ductility may decrease. Increasing the longitudinal reinforcement ratio can effectively increase the bearing capacity and ductility of composite columns.