Abstract The Both bonded and unbonded prestressing tendons may be used to reinforce post-tensioned (PT) concrete members. binding state of have an impact on how well different types PT elements function in flexural shear loads. Inverted-U shape reinforcement was experimentally enhance the behavior structural elements. obtained results confirmed proposed model’s accuracy for both slabs beams (bo...

Article history: Received 22 December 2008 Received in revised form 15 October 2009 Accepted 30 April 2010 Available online 8 June 2010

The objective of this paper is to investigate the dynamic behaviour post-tensioned concrete flat slabs with different geometries and damping ratios. Four groups models lengths, widths, thicknesses ratios designed according AS3600 standard. These were used determine influence each parameter on vibration serviceability by comparing control variable method reference model. assessment parameters as...

A bridge is a structure providing passage over an obstacle without closing the way beneath. The required passage may be for a road, a railway, pedestrians, a canal or a pipeline. Now a days, bridge deck section of Box shapes are used widely. Most of the bridges constructed are of Box girders. Method of post-tensioning in the construction of bridges is very common today. Most of the bridges are ...

Twisted tall building structures have recently been used as an architectural and structural form. On the other hand, there are very few studies on behavior of twisted buildings under seismic wind lateral loads. In this paper, wind-induced loads is investigated compared with their prismatic counterpart. As a case study, in Miami, Florida, modified by twisting all floor levels angle 3 degrees. La...

Cantilevers are a part of our life, they everywhere: bridg–es, building’s balconies, traffic signs, car parking shades even the aircraft’s wings. The long cantilevers buildings always present as big challenge to structural engineers in their practice life. behavior these depends on several factors, such rigidity slab, columns or walls, span continuity... etc. But real dilemma lies economical ch...

The fire-safe design of concrete structures which incorporate post-tensioned prestressing tendons has recently been the subject of debate within the structural engineering community, particularly when unbonded post-tensioned (UPT) prestressing tendons are used. Despite several studies aimed at furthering our understanding of the response of UPT concrete structures in fire, many aspects of their...

Pre-stressed members in various structures are gaining popularity among engineers many parts of the world because pre-stressed strands offer better stability, serviceability, economy, aesthetics, and structural efficiency. The profile strand greatly influences tensile strength concrete. force exerted by on concrete counterbalances internal forces. A construction engineer’s principal goal is to ...

the use of unbounded tendons is common in prestressed concrete structures and evaluation of the stress increase in unbonded tendons at ultimate flexural strength of such structure has posed a great challenge over the years. based on the bending experiment for two-span continuous post-tension beams with unbounded tendons and externally applied cfrp sheets, the monitoring of the stress increment ...

The application of external post-tensioned steel bars as an effective way to strengthen an existing bridge has been so far used in many different countries. In recent decades, however, they have been replaced by bars made from Carbon Fiber Reinforced Polymer (CFRP), as a material with high tensile strength and corrosion resistance, to address several concerns with steel bars such as their appli...