The collapse of the brick masonry infill in the Reinforced Concrete (RC) structures has been known as one of the causes of the many casualties during the earthquake. This clay brick masonry has been commonly used as partitions in the RC frame structures in earthquake-prone areas such as West Sumatera, Indonesia. Strengthening the brick masonry infill is expected to be able to increase the performance of the brick masonry against the earthquake motions, which also may improve the seismic performance of RC structures. In this study, four of 1/4 reduced-scale singe-bay and single-story RC frame specimens were prepared and tested under lateral static reversed cyclic loading. The specimens include one specimen of RC frame infilled with brick masonry and three specimens of RC frames infilled with strengthened brick masonry. Strengthening of the brick masonry infill has used three types of wire mesh, namely plastic wire mesh, steel wire mesh, and chicken wire mesh. The wire mesh was tacked on both sides of the diagonal area of the brick masonry infill. The wire mesh was then fastened to columns and beams of the RC frame by using chemical epoxy adhesive. The purpose of this experimental study is to define an effective, inexpensive, and easy to apply the strengthening of the brick masonry infill such that it may be applied by the local labors in West Sumatera, Indonesia. The structural test results have shown that all the strengthening methods increase the lateral strength of the RC frame and can delay the failure of the brick masonry infill. Even though the strengthening by using the steel wire mesh produced a higher increase in stiffness of the specimen compares to others, however strengthening by using chicken wire mesh performed the most effective strengthening method. The presence of the chicken wire mesh maintains the ductility of brick masonry infill and the RC frame as well.
Pidie Jaya earthquake on December 7, 2016 caused the damage of many buildings. This paper presents the case study on a building frame structure that has undergone large deformation during Pidie Jaya earthquake without structural damage. The building has 3 stories. The permanent lateral displacement and inter-story drift of the structure in Y direction at the third story after the earthquake is 420 mm and 4.2%, respectively, which exceed the requirement of Indonesian standard for design building and other structures under earthquake load (SNI 1726:2012). The building structure was modeled as a space frame. A response spectral analysis with design response spectral provided in SNI 1726:2012 was conducted. For comparison, a time history analysis based on real time ground acceleration during Pidie Jaya earthquake was also conducted. The maximum lateral displacement based on response spectral analysis is 469 mm with maximum inter-story drift of 4.79%. Based on time history analysis, the maximum lateral displacement and inter-story drifts are 550 mm and 5.81%, respectively. Based on those results, it is necessary to revise the design response spectrum in SNI 1726:2012.
Pidie Jaya earthquake occurred on December 7, 2016 caused the damage of many building structures. Therefore, it is important to assess the performance of building structures in resisting the earthquake load. In this paper, the performance assessment of two building structures, which were the Multipurpose Hall Building that has been deformed permanently and Prosecutor’s Office Buildings that have been experienced some flexural and shear cracks was conducted. The study was started by performing site, design document, and as built drawing assessment. The building structures were modelled as space frames using ETABS software and the data obtained from the site was inputted. The design response spectrum recommended by SNI 1726:2019 was used as spectrum demand. The performance of building structures was assessed by conducting a non-linear push over analysis in two X and Y directions until the structures near to collapse and capacity curves were obtained. By comparing the capacity and demand spectrums in Acceleration-Displacement Response Spectrum (ADRS) format, then the performance points of the structures were obtained based on ATC-40. Based on the inter-story drift at the performance point, then the performance levels of the structures were determined. The assessment results showed that the performance level of the Multipurpose Hall Building structure is Life Safety, while the Prosecutor’s Office Building structure is Damage Control.
Proper design of transverse reinforcement in the RC column is needed to maintain its ability to deform under axial and shear load safely. Even though mandatory building codes for transverse support of the RC column exist, shear failure was still found in the last high earthquake in Pidie, Aceh, in 2016. Therefore, as an attempt to improve RC column strength and elasticity, the effect of transverse reinforcement configuration was evaluated experimentally to a column subjected to an axial and shear load. The experiment was conducted by using four-column specimens with a cross-section 200 x 200 mm. Four types of transverse reinforcement configurations were applied in each column. The test was carried out by loading an axial load always and shear load gradually until its failure. The test results show that the configuration of transverse reinforcement has a significant effect of maintaining column stiffness, which was subjected to compressive axial load and shear load. Furthermore, the arrangement of transverse reinforcement influences the compressive strength significantly and enhance the concrete shear capacity of a column due to its confinement effect.
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