The paper presents a numerical study on the effects of opening size and location punching shear resistance flat slabs without drop panels reinforcement using ABAQUS. proposes an ABAQUS model that is enable to predict with openings. validated well experimental data in literature. Using model, are then investigated, results compared those predicted by ACI 318-19 TCVN 5574:2018. comparison between...

En este trabajo se realiza un análisis comparativo de la Norma Colombiana Sismorresistente NSR-10 y el reglamento ACI 318-19 (base del próximo título C norma NSR actualmente en desarrollo), dicha comparación detallaron las exigencias técnicas actuales presentes ambos reglamentos para sistemas pórticos concreto reforzado zonas amenaza sísmica alta. Inicialmente realizó entre cuerpo mostrando dif...

Slender concrete walls incorporated into tilt-up construction over the past 60 years have performed remarkably well under out-of-plane wind and seismic loads. While issues associated with seismic wall anchorage gave this form of construction a black-eye in the early days, the concrete walls themselves have always performed very well even as far back as their first use in the early 1900s. Yet th...

Post-earthquake observations and laboratory tests reveal the needs for innovative solutions that can enhance concrete compression ductility in boundary elements of special structural walls. This study proposes a new element design by utilizing hybrid fiber reinforced (HyFRC). One full-scale HyFRC is tested uniaxial compared to three conventional are compliant with ACI-318 codes. Results demonst...

This study evaluates the effect of shear on deflection reinforced concrete (RC) beams subjected to combined bending and shear. A total nine simply supported were manufactured with span-to-depth ratio, tension steel capacity ratio as test variables. The experimental results used evaluate by separating them into flexural deformations. theoretical specimens was calculated using effective moment in...

Cost and CO2 are two factors in the optimum design of structures. This study proposes a modified harmony search methodology for optimization reinforced concrete beams with minimum emissions. The was developed detail by considering all possible combinations variable loads, including dynamic force resulting from earthquake motion. Moreover, time-history analyses were performed, requirements ACI-3...

In this paper, optimum design of three-dimensional (3D) multi-story reinforced concrete (RC) structures is obtained using an improved version the plasma generation optimization (IPGO) algorithm. The reinforcing bars and geometry cross-sections are considered as discrete variables that chosen from a prearranged section database. objective function cost framework, steel concrete. moment shear fra...

Abstract Building infrastructure always chooses to use strong materials, low costs, easy maintenance and easily available materials. One of these materials is normal concrete which one the making using Portland cement. The process cement can cause damage environment due greenhouse emissions, so research needed create environmentally friendly concrete, geopolymer concrete. In there still not too...