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首页> 外文期刊>Bulletin of earthquake engineering >Analytical modeling of monolithic joints in concrete bridges
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Analytical modeling of monolithic joints in concrete bridges

机译：混凝土桥梁整体式接头的分析模型

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The behavior of bridge monolithic connections is modeled using a simplified mathematical model that accounts for stress equilibrium, compatibility of deformations, and the state of bond of longitudinal column bars anchored through the joint panel. In this regard, a stress gradient factor is introduced, to model the profile of bar stresses along the anchorage. To establish this factor, two independent mechanisms of stress transfer are considered: a bond mechanism between the anchored bars and the surrounding concrete and a friction mechanism between the anchored bars and the transverse bars that enclose and restrain the anchorages. The model is used for calculation of the shear stress-shear strain relationship of all tests found in the international literature on bridge monolithic connections that showed shear type of failure under simulated seismic loading. Joint strength values calculated with the proposed model are compared with the experimental results. Based on this comparison the proposed model is verified for use in interpretation of bridge monolithic connection behavior and design.
机译：使用简化的数学模型对桥梁整体连接的行为进行建模，该数学模型考虑了应力平衡，变形的相容性以及锚固在连接面板中的纵向纵梁的粘结状态。在这方面，引入了应力梯度因子，以模拟沿锚固的钢筋应力分布。为了确定这一因素，考虑了两个独立的应力传递机制：锚固钢筋与周围混凝土之间的粘结机制以及锚固钢筋与横向钢筋之间包围并约束锚固的摩擦机制。该模型用于计算国际文献中有关桥梁整体连接的所有测试的剪应力-剪切应变关系，这些测试显示了模拟地震荷载下的剪切破坏类型。将所提出的模型计算出的接头强度值与实验结果进行比较。基于此比较，验证了所提出的模型可用于解释桥梁整体连接行为和设计。

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