this paper provides a comparison of the maximum inter-story drifts and tip acceleration of both a 16 and 30 stories building each with different structural systems; hybrid r.c moment frame with shear walls and hybrid steel frame with shear walls and x bracing which are equipped by passive dampers. each of the building models were analyzed as fully non-linear structures for variety of dampers pl...

The medial collateral ligament (MCL) and the posterior oblique ligament (POL) are the main static valgus restraints of the knee.Most isolated medial injuries can be treated with bracing and early knee motion.Combined MCL and ACL (anterior cruciate ligament) injuries can be managed with bracing of the knee followed by a delayed reconstruction of the ACL.Residual medial laxity may be addressed at...

In the present paper, the focus is on the evaluation of steel dual-system frame buildings using four main types of structural analysis (Linear Static, Linear Dynamic, Nonlinear Static and Nonlinear Dynamic Analyses) with regard to "Seismic Rehabilitation Code for Existing Buildings in Iran" (based on FEMA 273 and 356) where the first two authors of the article tend to follow the previous work (...

in this paper, acceptance criteria of steel building code, comprehensive and quick evaluation procedures for x-bracing, are compared to each other parametrically and numerically. for this purpose, it is assumed first that the sample building is designed to meet steel building code and then by introducing transform parameters and using stress ratio of the designed components, acceptance of the d...

concentric bracing is one of the most common lateral load resistant systems in building frames, and areapplied to many structures due to their manufacturing simplicity and economics. an important deficiency in thebracing members is their irregular hysteretic loops under cyclic loading. in order to overcome this problem, it isadvised to restrain braces against buckling under compression, since b...

the rotational friction dampers can be improved the seismic behavior of the steel structures, and they can be reduced the internal forces in the bracing members, columns and the other structural members. in this research, a simple method for modeling and analysis of braced frames equipped by these dampers is proposed. the proposed model describes seismic behavior of dampers very well and it is ...

After surgical anterior cruciate ligament (ACL) reconstruction, knee bracing does not significantly protect against injury during recovery or afterwards (strength of recommendation [SOR]: C, based on expert opinion). In addition, the use of a knee brace following ACL reconstruction does not improve stability or hasten rehabilitation, either immediately or for up to 2 years (SOR: A, based on ran...

Long-leg bracing affords ambulatory potential and helps reduce the incidence of deformity in patients with paralysis or weakness caused by lesions of the spinal cord. The conventional long-leg brace or knee-ankle orthosis (KAO) consists of double metal uprights, drop locks or bail locks at the knee, double action ankle joints with anterior and posterior pin stops, metal stirrup, and steel shank...

The main girders of the I-section steel-concrete composite twin girder bridge is usually connected together by frame cross bracing. When with welding, flat plates for stiffening can be used to strengthen connection ensure effective transfer forces between two. In this paper, finite element simulation method study influence plates. results show that, compared structure without stiffening, when s...