Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Backbone model for predicting the shear behavior of geopolymer panels under diagonal tension tests
Highlights Predicting the shear behavior of geopolymer concrete wall panels has not been studied. Backbone model was proposed to predict the shear behavior of 27 housing panels. The model properly captures the shear strength and drift at three limit states of behavior. New factors and trends are proposed for code-base design of geopolymer panels. Backbone model may be useful for modelling and seismic design of geopolymer walls.
Abstract This study develops a novel backbone model based on a set of empirical equations to predict the shear performance of geopolymer wall panels under monotonic diagonal tension. The model describes a trilinear envelope which allows to predict the shear strengths and drifts at the diagonal cracking, peak and ultimate limit states of the geopolymer panels. A comprehensive experimental program comprising diagonal tension testing on 27 squat housing panels was considered for the model calibration, including three different concrete types and three web shear reinforcement ratios made of welded-wire mesh. Results showed that geopolymer concrete contribution to cracking and peak strengths of the panels can be set as , drifts at 0.03%-0.05%, 0.20%-0.45% and 0.75%-0.85% are advised for the cracking, peak and ultimate limit states, and new efficiency factors of the web reinforcement can be fixed as 0.35–0.75 for geopolymer panels. In addition, a statistical analysis demonstrated the trustful fitting of the proposed model reaching average prediction-to-test ratios ranging from 0.8 to 1.2, average coefficients of variation of 15%, and average overpredictions close to 40%. The backbone model proposed here is intended to be a useful reference in a new preliminary performance-based framework for earthquake-resistant structural design of geopolymer concrete panels and low-rise walls controlled by shear deformations.
Backbone model for predicting the shear behavior of geopolymer panels under diagonal tension tests
Highlights Predicting the shear behavior of geopolymer concrete wall panels has not been studied. Backbone model was proposed to predict the shear behavior of 27 housing panels. The model properly captures the shear strength and drift at three limit states of behavior. New factors and trends are proposed for code-base design of geopolymer panels. Backbone model may be useful for modelling and seismic design of geopolymer walls.
Abstract This study develops a novel backbone model based on a set of empirical equations to predict the shear performance of geopolymer wall panels under monotonic diagonal tension. The model describes a trilinear envelope which allows to predict the shear strengths and drifts at the diagonal cracking, peak and ultimate limit states of the geopolymer panels. A comprehensive experimental program comprising diagonal tension testing on 27 squat housing panels was considered for the model calibration, including three different concrete types and three web shear reinforcement ratios made of welded-wire mesh. Results showed that geopolymer concrete contribution to cracking and peak strengths of the panels can be set as , drifts at 0.03%-0.05%, 0.20%-0.45% and 0.75%-0.85% are advised for the cracking, peak and ultimate limit states, and new efficiency factors of the web reinforcement can be fixed as 0.35–0.75 for geopolymer panels. In addition, a statistical analysis demonstrated the trustful fitting of the proposed model reaching average prediction-to-test ratios ranging from 0.8 to 1.2, average coefficients of variation of 15%, and average overpredictions close to 40%. The backbone model proposed here is intended to be a useful reference in a new preliminary performance-based framework for earthquake-resistant structural design of geopolymer concrete panels and low-rise walls controlled by shear deformations.
Backbone model for predicting the shear behavior of geopolymer panels under diagonal tension tests
Cárdenas-Pulido, Jhon (Autor:in) / Carrillo, Julian (Autor:in) / Reyes, Juan C. (Autor:in) / Ramirez, Fernando (Autor:in)
07.07.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Brick Masonry Diagonal Tension (Shear) Tests
| British Library Conference Proceedings | 1989