نوع مقاله : یادداشت فنی
نویسندگان
1 دانشکده مهندسی عمران- دانشگاه تربیت مدرس
2 دانشکده فنی و مهندسی - دانشگاه تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Response assessment of buildings to excavation-related ground movement is an important design aspect of support systems in urban areas. This is even more important if the adjacent structure be old or have low strength parameters. Frame distortion and crack generation are signs of building damage by excavation-induced ground movement, and are a challenge in projects involving deep excavations. These highlight the importance of the evaluation of building responses in excavation projects.The aim of estimation and evaluation of building response is to establish limiting criterion for excavation support system design to certify structural safety against undesirable damage. Thus, the limiting criterion prepares a framework to determine the damage level of buildings based on excavation induced ground movement. Limiting criterion is also known as damage criterion or damage models. Damage models are too practical before design progress of nailing wall. Based on the uncertainty of data from excavation projects and the variability of the many factors that contribute to the response of nearby structures, existing damage models are rare and generally need special instrumentation of the excavation wall and nearby structures. So, they cannot prepare a simple framework for use in practical situations.This paper describes a study of building responses to excavation-related ground movement and provides a procedure for damage assessment of buildings near excavation projects. This study uses field data based on 10 case studies and calibrated FEM models, in addition to probabilistic analysis, to establish new simple damage criteria for design consideration of excavations supported by a soil nail wall technique. The presented damage model simply relates the damage level of the structure to the maximum displacement of the excavation wall.The deflection mode of a soil nail wall for two types of nail distribution and 23 types of soil, in addition to the results of free field analysis, are also topics presented in this paper to achieve the damage model.
کلیدواژهها [English]
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