Kihak Lee

TL;DR: In this article, the authors evaluated the mechanical properties of heat-cured low-calcium fly-ash geopolymer concrete and the behavior of geopolymers concrete beams using a flexural test with four-point bending, elastic theory, and a finite element model.

TL;DR: In this paper, the effect of using CFRP sheets for enhancing strength and increasing ductility of the non-seismic beam-column joints was investigated and the test results showed that appropriately adding CFRP composites to the nonsmall beam-Column joints significantly improved the lateral strength as well as ductility.

TL;DR: In this article, two machine learning approaches are proposed for predicting the compressive strength of fly ash based geopolymer concrete, which can be used to build a standard mix, and for designing the mix proportions.

TL;DR: In this paper, the authors focused on performance prediction of new steel special moment resisting frame buildings assumed to be built after the Northridge earthquake and designed a total of 26 post-Northridge buildings that represent typical steel SMRF buildings based on the new seismic code (1997 NEHRP) and pre-qualified post Northridge connections.

TL;DR: In this article, a linear static model using the damaged state of brittle fractured connections in steel moment resisting frame buildings was used to estimate the interstory drift of the damaged buildings when compared to nonlinear time history analysis.