This paper compares the measured lateral load behaviors of two 0.4-scale “hybrid” precast concrete wall test specimens – one wall with solid panels and the other with perforated panels. The test specimens have the same overall geometry and utilize a combination of mild [i.e., Grade 400 (U.S. Grade 60)] steel and high-strength unbonded post-tensioning (PT) steel for lateral resistance across hor...

In engineering design, the strength analysis of concrete structures heavily depends on compressive hybrid fiber reinforced (HFRC), which also has an impact stability and safety structure. The objective this study is to develop a unified empirical model that can quickly estimate under multiaxial compression. To measure concrete, 108 cylindrical specimens 225 cubic were designed for conventional ...

Multiscale modeling for cement-based materials, such as concrete, is a relatively young subject, but there are already a number of different approaches to study different aspects of these classical materials. In this paper, the parameter-passing multiscale modeling scheme is established and applied to address the multiscale modeling problem for the integrated system of cement paste, mortar, and...

the objective of this study has been to examine the relationship between home and the hospital confinement in the treatment of serious illness and the impact of such phenomena on the pattern of the delivery of health care in the rural areas. in this study a total of 10,248 inhabitants of 11 villages in isphahan (mobarakeh area) were studied during a six months period between march and september...

This paper conducts an experimental study on the axial compressive performance of FRP-steel-concrete composite columns. Nine short columns were produced and evaluated in study, comprising three concrete-filled steel tube reference six columns, respectively denoted as “reference columns” “composite columns”. Two categories failure modes, including shear waist drum, observed from experiments. The...

Humidity change in concrete is the leading cause of shrinkage. Moreover, moisture diffusion coefficient an essential parameter for assessing and predicting internal content concrete. However, there a lack theoretical construction experimental studies on effect different conditions, especially constraints, Therefore, humidity, pore structure parameters, basic mechanical properties under strength...