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首页> 外文期刊>Journal of bridge engineering >Seismic Performance of Precast Bridge Columns with Socket and Pocket Connections Based on Quasi-Static Cyclic Tests: Experimental and Numerical Study
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Seismic Performance of Precast Bridge Columns with Socket and Pocket Connections Based on Quasi-Static Cyclic Tests: Experimental and Numerical Study

机译：基于准静态循环试验的带承插连接式预制桥梁柱的抗震性能：试验与数值研究

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摘要

In this study, four 1/3-scale bridge column specimens were investigated both experimentally and numerically. The specimens consisted of two cast-in-place (CIP) reference columns and two precast columns for the study of socket and pocket connections, respectively. The precast columns were designed based on the actual application of precast urban viaducts in Shanghai, China. Therefore, this study investigated and verified the seismic performance of these connection approaches. Based on the test results of the hysteretic behavior and derived indexes, both columns with socket and pocket connections have shown equivalent seismic performances to their CIP references. The differences between precast and CIP columns were within 15% for all indexes, and the damage development and failure mechanism were also similar. Finite-element models were created with displacement analyser (DIANA) and calibrated with the test data. Bond-slip behavior with the built-in embedded reinforcement element, concrete cracking with tension softening, and material nonlinearity were considered. Under monotonic pushover analysis, the load-displacement curves were in good agreement with the backbone curves of the test results.
机译：在这项研究中，对四个1/3比例的桥柱标本进行了实验和数值研究。标本由两个现浇（CIP）参考柱和两个预制柱组成，分别用于研究插座和袋式连接。预制柱是根据中国上海城市预制高架桥的实际应用而设计的。因此，本研究调查并验证了这些连接方法的抗震性能。根据磁滞特性和派生指标的测试结果，具有承窝和型腔连接的两列均显示出与CIP参考等效的抗震性能。对于所有指标而言，预制柱和CIP柱之间的差异均在15％以内，并且损伤发展和破坏机理也相似。用位移分析仪（DIANA）创建了有限元模型，并用测试数据进行了校准。考虑了内置埋入式增强元件的粘结滑移性能，随着软化作用而开裂的混凝土以及材料的非线性。在单调推覆分析下，荷载-位移曲线与试验结果的主干曲线吻合良好。

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