Seismic safety assessments of historical timber buildings using updated finite element models: Case study of Yingxian wooden pagoda, China

结构工程 有限元法 工程类 峰值地面加速度 铰链 剪切(地质) 土木工程 计算机科学 地质学 地震动 岩石学 程序设计语言
作者
Yang Deng,Yuhang Li,Aiqun Li
出处
期刊:Journal of building engineering [Elsevier BV]
卷期号:63: 105454-105454 被引量:9
标识
DOI:10.1016/j.jobe.2022.105454
摘要

Historical timber buildings are important for the global architectural heritage. However, establishing accurate models for seismic performance evaluations to assess the safety of historical buildings remains challenging. Therefore, simplified simulation methods—the dougong (DG) and mortise-tenon joints (MTJs) based on shear and bending plastic hinges—were developed. Moreover, a model updating method based on multiple degrees of freedom considering the initial inclination was improved to obtain accurate finite element (FE) models. Using the FE model of the Yingxian wooden pagoda in China as an example, the proposed methods were validated against field monitoring measurements. A time history seismic analysis was also conducted on the updated pagoda FE model. The results revealed that the simplified simulation method could accurately and efficiently simulate the plastic behaviors of the DG and MTJs. Furthermore, the model updating procedure reduced the maximum period difference from 9.77% to 2.98%. The maximum story drift ratio reached 1.590% under an earthquake, with a peak ground acceleration of 310 gal; this indicated that the pagoda model described moderate damage; certain components were in a plastic state with a maximum rotation of 0.0427. Notably, this study provides a useful method and a basis for establishing and evaluating models and assessing the seismic safety of historical timber buildings.
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