نوع مقاله : مقاله کامل پژوهشی
نویسندگان
دانشکده مهندسی عمران، دانشگاه صنعتی سهند، تبریز
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Steel angle sections are widely used in power transmission lines lattice towers. Using these section types and these bolted connections introduce eccentricities between the load transferred at the joints and the longitudinal principal axis of the member. Also, the joint slippage and initial crookedness in the member of lattice tower leads to a complex behavior, especially for the members under compression force. These types of imperfections reduce the capacity compared to a simple ideal member under central loading. For proper modeling and better prediction of tower failure, it is necessary to provide a suitable approach in modeling angles. In this study, by using a simple method in the modeling of angle members, the effect of geometric imperfections (eccentricity, joint slippage and initial crookedness) on the failure behavior of angle under compressive force has been investigated. In this regard, presents a study of the behavior of single angle compression members connected through one leg only with single and double bolted connections. Non-linear finite element simulation with OpenSees software has been done and results are compared with experimental tests conducted by other researchers. Comparison is also made with the strength predicted by major code provisions. The results of the study are found the sensitivity of the failure behavior of angle to geometric imperfections, and also the FE simulation of both single and double bolted angles satisfactorily predicted the capacity compared to the experimental results.
کلیدواژهها [English]
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