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Numerical analysis method for long-term behavior of integral abutment bridges

机译：整体式桥台长期性状的数值分析方法

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Many engineering uncertainties exist in the prediction of integral abutment bridge (IAB) long-term behavior. This paper reports on the development of numerical modeling methodologies formulated on the basis of an extensive field monitoring program and results obtained from four IABs on I-99 in central Pennsylvania. The proposed numerical modeling methodologies allow long-term bridge response prediction, recognizing that an IAB has significant time-dependent response changes as a result of irreversible soil-structure interaction and time-dependent effects of the superstructure in the case of prestressed concrete girders. Both measured and numerical responses indicate that soil-structure interaction and time-dependent effects significantly influence long-term IAB behavior. In addition, relatively low rotational stiffness and nonlinear behavior of common abutment-to-backwall connections influence long-term response. The proposed numerical modeling methodologies are practical and reasonably predict long-term IAB behavior and response under thermal loading.
机译：整体式桥台（IAB）长期行为的预测中存在许多工程不确定性。本文报告了在广泛的现场监测计划的基础上制定的数值建模方法的发展以及从宾夕法尼亚州中部I-99上的四个IAB获得的结果。所提出的数值建模方法可以进行长期桥梁响应预测，因为在预应力混凝土大梁的情况下，由于不可逆的土壤-结构相互作用和上层建筑的时效效应，IAB具有显着的时效响应变化。实测和数值响应均表明，土壤与结构的相互作用和时效效应显着影响IAB的长期行为。此外，普通的基台到后墙连接的相对较低的旋转刚度和非线性行为会影响长期响应。所提出的数值建模方法是实用的，并且可以合理地预测热负荷下的长期IAB行为和响应。

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