نتایج جستجو برای: prestressing
تعداد نتایج: 460 فیلتر نتایج به سال:
The favorable mechanical properties of basalt fiber–reinforced polymer (BFRP) bars, such as their excellent strength-to-weight ratio, resistance to corrosion, lower environmental impact, and electromagnetic neutrality, make them attractive for internal reinforcement concrete elements with specific service requirements. Prestressing has emerged a possible method limiting the deflections cracking...
This work presents an explicit FE method to compute the deformations of an aorto-iliac structure induced by the insertion of endovascular extra-stiff guidewires for the treatment of abdominal aneurysms. The mechanical model takes into account the nonlinear behavior of the arterial wall, the prestressing effect induced by the blood pressure and the mechanical support of the surrounding organs an...
This study presents the effect of corrosion prestressed concrete (PC) strands on prestressing force and reduction mechanism uniaxial force. A total 14 was tested by combining a rigid frame testing machine with an electrified accelerated device. The specimens were divided into two groups having levels 70% 50% tensile strength PC strands. expected degree specimens, which defined mass loss, calcul...
Abstract Stress/force monitoring of prestressing tendons is challenging but crucial to the evaluation safety structures in which they are used. To this end, a smart elasto-magneto-electric (EME) sensor based on elasto-magnetic (EM) and magneto-electric (ME) effects proposed for noncontact field absolute stress these steel tendons. In paper, our research design, implementation, application EME s...
In this paper, an experimental and numerical study was adopted to investigate the effect geogrid soil reinforcement prestressing on the pressure settlement relation of sand bed supporting a strip foundation. The studied parameters include foundation depth and pre-stress ratio for the cases of one and two pre-stressed reinforcement layers. The study reflected that pre-stressing of soil reinforce...
In an external prestressing system, there is no strain compatibility between the cable and the concrete at every cross-section, the increment of cable strain must be evaluated by taking into account the whole structure, rather than performing the calculation at each section, independently. In this study, a method for the calculation of cable strain, which is based on the deformation compatibili...
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