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Under eccentric load, a single column pier bridge often overturns. In order to study the anti overturning performance of a single column pier bridge, taking the accident bridge in Wuxi as an example, a finite element model is established based on ABAQUS. According to the model simulation results, the relationship between the ultimate rotational load and overturning load of the accident bridge is obtained, and the ratio of the latter to the former is 1.75. Based on the model, the stress state, displacement state, and support state of the accident bridge under dead load, highway class I vehicle load, and accident vehicle load are obtained. Whether the strength and stability of the accident bridge under each load meet the service requirements is analyzed. In order to explore the differences among China, United States, and Japan specifications, the lateral stability of accident bridges is checked. It is found that the safety of the United States and Japan specifications is conservative, but the utilization rate of bridge traffic capacity is low. The safety of China specifications is slightly lower, but it can maximize the bridge's traffic capacity and judge the ultimate overturning state of the bridge more accurately. The research results can provide technical references for the design and application of a single-column pier bridge. [ABSTRACT FROM AUTHOR]

Abstract: The 2008 Iwate–Miyagi intraplate earthquake (M7.2) occurred close to volcanoes such as Mt. Kurikoma along the southern foothills of the Ou Backbone Range (OBR), northeastern Japan. To understand the generation processes of this intraplate earthquake, 3D modeling of the faulting and tectonic loading processes around the OBR is performed using a finite element analysis considering viscoelasticity and plasticity in a compressional tectonic setting based on our previous 2D modeling. A small high-temperature area is set below the OBR, along with local high-temperature areas caused by volcanoes. In the non-volcanic area between the volcanic regions, two fault zones are generated some distance from the center of the OBR. However, near the volcanic regions, two fault zones are generated close to the center of the OBR. The fault zones corresponding to the Iwate–Miyagi intraplate earthquake are modeled to develop near the volcanic region, which is consistent with observations. The 3D geometry of fault zones and the stress loading processes for this intraplate earthquake were affected by the thermal structure caused by volcanic activity in the region. [Copyright &y& Elsevier]