外文翻译-在采矿塌陷区范围内的土壤结构相互作用的数值研究.doc

1、翻译部分Numerical study of the soilstructure interaction within mining subsidence areasOlivier Deck *, Harlalka AnirudhLAEGO, Nancy-Universite, Ecole des Mines de Nancy, Parc de Saurupt, F-54042 Nancy, Francearticle infoArticle history：Received 24 September 2009Received in revised form 9 June 2010Accept

2、ed 3 July 2010Available online 24 July 2010AbstractStructures affected by mining subsidence are exposed to heavy damage potential in relation to the induced tensile or compressive horizontal ground strains. This study intends to specify and compare the mining subsidence effect in terms of building t

3、ransmitted movements or induced stresses, given the soilstructure interaction phenomena produced at the interface between a “stiff” elastic structure and a “exible” elastoplastic soil. A series of models, developed using nite element software, has enabled a parametric study of the soilstructure inte

4、raction. Briey, the results of this study enabled visualisation and characterisation of various phenomena related to the soilstructure interaction as a function of the intensity of the free-eld horizontal ground strain caused by subsidence, the building length and stiffness, and the soil mechanical

5、properties. It was thus possible to identify and assess the relations between free-eld horizontal ground movements and movements and stresses transmitted to the buildings. Differences between the traction and compression zones were investigated in order to identify the nonlinearity of the building l

6、oading. Finally, an analytical model of building loading assessment was tested and compared with the numerical results, with similar loading in the compression zone and discrepancies in the traction zone.2010 Elsevier Ltd. All rights reserved.Keywords：Mining subsidence; Soilstructure interaction; Ho

7、rizontal ground strain; Buildings loading; Finite element method1. IntroductionMining subsidence refers to ground movements caused by the collapse of mines or underground quarries that are characterized by vertical and horizontal displacements and are the source of potentially severe damage to build

8、ings located in subsidence areas (Fig. 1). Many countries are concerned by this hazard; the Lorraine region in France is an example. It contains a great number of iron, salt and coal deposits that were heavily mined until the beginning of the 1990s (salt continues to be mined). The presence of the f

9、ormer iron mines has raised many issues, including those of existing building vulnerability and building design.Many methods exist for evaluation of the free-eld ground movements of subsidence 1. The amplitude of the movement depends on the underground cavity geometry (e.g., opening, width, depth, a

10、nd ore dip), the quarrying technique (e.g., caving, room and pillar methods) and the type of overburden (geological and geotechnical specications, presence of rock beds, material strength and stiffness). Mining subsidence is characterised by ground surface vertical that may reach a few meters in len

11、gth and horizontal movements (Fig. 1a). Two main zones are identied： the compression zone and the traction zone. The former is located near the centre of the subsidence and is characterised by a sagging prole (vertical movements) and compressive horizontal ground strains (horizontal movements). The

12、latter is located near the edge and is characterised by a hogging prole and tensile horizontal ground strains. In these two zones, the ground curvature typically lies between 500 m and 5000 m and the horizontal ground strain lies between 1 and 10 mm/m (Fig. 1b). Building damage (Fig. 1c) is mainly a

13、ssociated with the exion induced by the ground curvature and the horizontal load induced by the horizontal ground strain. However, the stiffness contrast between ground and buildings, possible building collapse and soil yield involve soilstructure interaction phenomena. The impact assessment of subs

14、idence on buildings raises the following issues：(i) Comprehending associated soilstructure interaction phenomena and the behaviour of the ground in the vicinity of a building is necessary to improve existing damage assessment methods. Kratzsch addresses the effect of building stiffness as the underg

15、round displacement eld change and rupture shear planes appear in the soil with a direction that depends on the free-eld horizontal ground strain. In the compression zone, the shear planes are directed from the building edge outward the centre of the structure (Fig. 2a). In the traction zone, the she

16、ar planes are directed from the building edge toward the centre of the structure (Fig. 2b). The inuence of the ground mechanical properties and the building properties on these shear planes is not known.(ii) Free-eld displacements may not be fully transmitted to buildings when they are stiff and strong. In this case, the damage assessed by the free-eld groundmovements prole can be overestimated. The question of the relation betw