地震荷载下罗马式教堂的模型与分析:抗震能力评估

Modelling and Analysis of a Romanesque Church Under Earthquake Loading:Assessment of Seismic Resistance

分析罗马式砌体教堂以评估其结构性能及地震脆性,从一个特殊案例出发,提供了纪念碑砌体建筑在地震作用下的模型和分析的结果。采用有限元方法对传统的砌体结构进行静态和动态非线性分析并应用于案例研究。采用拟静态方法(地震系数法)评估地震荷载(事实上很多砌体结构地震性能的分析是相同的),与承载力的对比证实这类建筑大规模的损坏以及可能的坍塌正如经常被观察到的那样。此外,分析了当前修复和加固技术的实际效率,以评估其效益。对修复和加固技术的分析显示,提高抗震能力,增强了对普通结构加固的效果。提倡从先进的数字分析来获得重要的信息。即关于对既有破坏的理解、对最小加固量和适当加固设计的理解。基于结构分析的复杂工具,对结构性能和可靠加固的清晰理解能减少古代结构修复补救的范围。

In this paper a Romanesque masonry church is analysed in order to assess its structural behaviour and its seismic vulnerability with respect to the actual state of conservation. Starting from a specific case study, a contribution to the issue of modelling and analysis of monumental masonry buildings under seismic action is provided. A finite element methodology for the static and dynamic nonlinear analysis of historical masonry structures is described and applied to the case study. A quasi-static approach （the seismic coefficient method） for the evaluation of the seismic loads has been used （as indeed is common in many analyses of the seismic behaviour of masonry structures）.