Lu Wenliang, Peng Wen-Qiang, Zhu Li, Gao Cong, Tang Ya-Dong, Zhou Yue-Wu, Su Wei, Zeng Bing
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China.
Guangdong Provincial Academy of Building Research Group Co., Ltd., Guangzhou 510500, China.
Materials (Basel). 2022 Oct 9;15(19):6991. doi: 10.3390/ma15196991.
To investigate the static performance of precast segmental hollow piers, two precast segmental hollow pier specimens were designed for static loading tests on the top of piers. The finite element model of precast segmental hollow piers was established by the finite element software Abaqus and verified based on the test results. Based on the experimental and finite element models, three optimal design solutions were proposed, and the calculation results of each solution were analyzed. The results show that precast segmental hollow pier mechanical behavior is similar to that of cantilevered bending members. The specimens present brittle damage characteristics after the destruction of the structure at the bottom of the pier pressure edge as the axis of the rigid body rotation. Following the test loading process, the bonding between the segments is good, except for the pier bottom damage surface of the rest of the bonding surface, which has no relative displacement. The calculation results of the finite element model are in good agreement with the test results and can effectively predict the load-displacement response of precast piers. Three optimized design solutions are proposed. The finite element simulation proves all three optimized design solutions show better overall ductility than the original solution and can effectively improve the performance of segmental precast hollow piers.
为研究预制节段式空心桥墩的静力性能，设计了两个预制节段式空心桥墩试件进行墩顶静力加载试验。采用有限元软件Abaqus建立预制节段式空心桥墩的有限元模型，并根据试验结果进行验证。基于试验和有限元模型，提出了三种优化设计方案，并对各方案的计算结果进行了分析。结果表明，预制节段式空心桥墩的力学行为类似于悬臂弯曲构件。试件在墩底压力边缘结构破坏后呈现出以刚体转动轴为轴的脆性破坏特征。随着试验加载过程的进行，各节段之间的粘结良好，除墩底破坏面外其余粘结面均无相对位移。有限元模型的计算结果与试验结果吻合良好，能够有效预测预制桥墩的荷载-位移响应。提出了三种优化设计方案。有限元模拟证明，三种优化设计方案均比原方案具有更好的整体延性，能够有效提高节段式预制空心桥墩的性能。
