《Journal of Geotechnical and Geoenvironmental Engineering》杂志刊登“三维地层运动引起建筑物损伤的评估”

作者：Eshagh Namazi and Hisham Mohamad, A.M.ASCE

刊物：《Journal of Geotechnical and Geoenvironmental Engineering》，139卷第4期，608–618页

关键词：建筑物；板；开挖；变形；弯曲；裂缝；沉降；损伤；三维；分析方法

摘要：对大城市的地下建筑物，由于开挖引起的地基沉降对建筑物造成破坏被得到广泛关注。为了防止建筑物破坏，一般假设产生可视裂缝的位置与结构的极限或临界拉伸应变有关。目前计算拉应变的分析模型把建筑物的独立墙看作弹性深梁。由于这些方法是二维的，因此墙被假设垂直于挖掘口轴线。为了得到最大的拉伸应变而只考虑平面运动，例如弯曲这样的三维位移的影响常被忽略。本研究中将建筑物假设为一个简支四边形弹性厚板。并将拉伸应变的情况和可视裂缝的位置之间的关系应用于板理论中。提出了以临界位移参数（例如挠度比、水平应变和弯曲）为基础的建筑物的破坏标准。最后利用几个案例的研究结果评估了这个方法预测破坏程度的能力。结果表明，本文提出的板模型比其他梁模型的预测结果更精确。

Assessment of Building Damage Induced by Three-Dimensional Ground Movements

Authors:Eshagh Namazi and Hisham Mohamad, A.M.ASCE

Journal:《Journal of Geotechnical and Geoenvironmental Engineering》，Volume 139, Number 4,608–618

Key words:Building; Plate; Excavation;Deformation; Twist; Cracking; Settlement;Damage; Three-dimensional;Analytical method

Abstract: Damage in buildings caused by excavation-induced ground displacement is a major concern in any underground work of an urban area. To predict the building damage, it is generally assumed the onset of visible cracking is associated with the limiting or critical tensile strain of the structure. The present analytical models of calculating tensile strains analyze individual walls of the building as elastic deep beams. Because of the two-dimensional nature of these methods, the walls are assumed to be perpendicular to the excavation axis. To obtain the maximum tensile strain, only in-plane movements are considered, whereas the effects of three-dimensional displacements such as twist are ignored. In this study, the building is represented as a simply supported rectangular elastic thick plate. The relationship between the state of tensile strain and the onset of visible cracking is applied to the plate theory. The building damage criteria based on critical displacement parameters, namely deflection ratio, horizontal strain, and twist, are proposed. A number of case studies of damaged buildings are used to assess the ability of this procedure to predict the degree of damage. The new plate model obtained the most number of accurate predictions compared with the other beam models.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000822