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Showing papers on "Earthquake resistant structures published in 2021"


Journal ArticleDOI
TL;DR: In this article, a simplified added-mass model is proposed for evaluating the seismic response of rectangular hollow piers in deep water, which are widely used in railway bridges, and the model is applied to evaluate the seismic responses of railway bridges.
Abstract: A simplified added-mass model is proposed in this paper for evaluating the seismic response of rectangular hollow piers in deep water, which are widely used in railway bridges. For this pu...

13 citations


Journal ArticleDOI
TL;DR: In this paper, the elastoplastic response of different steel beams in three-point bending, under monotonic and cyclic loads, is investigated through experimental tests and theoretical analysis to investigate their efficacy to be used as fuses in an innovative bracing system.

9 citations


Journal ArticleDOI
05 Jul 2021-Fibers
TL;DR: In this paper, an analytical and experimental investigation was conducted to examine the cyclic load behavior of beam-column joint subassemblages, typical of both the modern reinforced concrete (RC) structures and of the pre-1960s-1970s existing ones.
Abstract: An analytical and experimental investigation was conducted herein to examine the cyclic load behavior of beam–column joint subassemblages, typical of both the modern reinforced concrete (RC) structures and of the pre-1960s–1970s existing ones. Seven exterior RC beam–column joint subassemblages were constructed and subjected to earthquake-type loading. Three specimens were designed according to the requirements of the Eurocode (EC) for ductility class medium (DCM), while the other three specimens possessed poor seismic details, conforming to past building codes. The hysteresis behavior of the subassemblages was evaluated. An analytical model was used to calculate the ultimate shear capacity of the beam–column joint area, while also predicting accurately the failure mode of the specimens. It was clearly demonstrated experimentally and analytically that it is possible for excessive seismic damage of the beam–column joint region to occur when designing according to the current European building codes. In addition, the proposed analytical model was found to be very satisfactory in accurately predicting seismic behavior and in preventing the premature brittle shear failure of the joints. The seventh subassemblage, constructed with steel fiber RC and significantly less transverse reinforcement than that required according to the EC, exhibited satisfactory ductile seismic performance, demonstrating the effectiveness of the proposed design solution.

6 citations


Journal ArticleDOI
TL;DR: In this paper, the authors proposed a procedure to cost-effectively design earthquake-resistant buildings, which is based on the inversion of an artificial neural network and on an optimization algorithm for the minimum total cost under building code constraints.
Abstract: An effective seismic design entails many issues related to the capacity-based assessment of the non-linear structural response under strong earthquakes. While very powerful structural calculation programs are available to assist the designer in the code-based seismic analysis, an optimal choice of the design parameters leading to the best performance at the lowest cost is not always assured. The present paper proposes a procedure to cost-effectively design earthquake-resistant buildings, which is based on the inversion of an artificial neural network and on an optimization algorithm for the minimum total cost under building code constraints. An exemplificative application of the method to a reinforced-concrete multi-story building, with seismic demands corresponding to a medium-seismicity Italian zone, is shown. Three design-governing parameters are assumed to build the input matrix, while eight capacity-design target requirements are assigned for the output dataset. A non-linear three-dimensional concentrated plasticity model of the structure is implemented, and time-history dynamic analyses are carried out with spectrum-consistent ground motions. The results show the promising ability of the proposed approach for the optimal design of earthquake-resistant structures.

3 citations


Journal ArticleDOI
TL;DR: In this article, the authors have modelled symmetric and asymmetric buildings such as H-shape, L- shape, Rectangular shape and T-shape using ETABS software.

2 citations


Journal ArticleDOI
TL;DR: Al-Sokhna area has been selected for installation one of the electric power plants along the Cairo-Suez Road as mentioned in this paper. Unfortunately, this area lies within small-moderate seismicity area where some destructive earthquakes (>5), great number of earthquakes with magnitudes of less than 5 have been recorded.

2 citations


Journal ArticleDOI
TL;DR: In this article, a twin-column pier with a steel shear link (SSL) installed in the cap beam to reduce seismic damage in the transverse direction is proposed, which interrupts the rigid cap beam and relieves the coupled deformation of the two columns.
Abstract: This paper proposes a novel twin-column pier with a steel shear link (SSL) installed in the cap beam to reduce seismic damage in the transverse direction. The SSL interrupts the rigid cap beam and relieves the coupled deformation of the two columns. Benefits of the yieldable SSL in the event of a strong earthquake are the longer effective deformation of a column and limited axial compressive load. A benchmark reinforced-concrete bridge is employed in a seismic performance evaluation to verify the damage reduction performance of the novel twin-column pier with an SSL. Five numerical models, calibrated in a physical component test, are built in ABAQUS; that is, one original bridge and four novel bridges with different SSLs and accompanying configurations. Modal analysis shows that introducing the SSL does not change the overall structural dynamic characteristics. The nonlinear dynamic analysis results indicate that adopting the SSL effectively reduces the peak compressive strain of the reinforced-concrete column, but energy dissipation from the SSL is negligible compared with the total inputted seismic energy. There is no evident change in the macro seismic response of the twin-column pier when using the SSL, such as overall drift and structural damping ratio. Moreover, a transverse continuous main girder is suggested for realizing an additional restoring moment at the column top, which further reduces compressive strain.

1 citations


Journal ArticleDOI
TL;DR: The ability of shallow bridge foundations to dissipate earthquake energy via rocking has gained significant attention by bridge engineers as mentioned in this paper, owing to recent efforts to quantify the performancess of bridge foundations.
Abstract: The ability of shallow bridge foundations to dissipate earthquake energy via rocking has gained significant attention by bridge engineers owing to recent efforts to quantify the performanc...

1 citations


Journal ArticleDOI
TL;DR: In this article, a displacement-damage-based design procedure is proposed and implemented by means of a computer-aided tool named DAMPERS (DAMage Protection of Earthquake Resistant Structures).

1 citations


Journal ArticleDOI
K. Hemanth, S. Shamshad Begum1
TL;DR: In this article, the impact of level and slanting ground on structure execution ground inclines of 00 and 100 are considered in displaying of structures of tallness G+15 RCC structures having material properties M40 grade for cement and Fe500 for fortifying steel.
Abstract: In the present investigation to discover the impact of level and slanting ground on structure execution ground inclines of 00 and 100 are considered in displaying of structures of tallness G+15 RCC structures having material properties M40 grade for cement and Fe500 for fortifying steel and structures measurements are length = 6x10= 60m, width = 6x5 = 30m and statures of G+15 is 48m from the plinth level, the help conditions are picked to be fixed base and establishment profundity is considered as 2m beneath the ground level structures are demonstrated utilizing ETABS in seismic zones II, III, IV, V according to IS 1893-2002 strategies utilized for seismic burden age are Linear static examination, Response range examination and Time history examination. The outcomes are appeared as far as charts and tables.

Journal ArticleDOI
13 Jan 2021
TL;DR: In this article, a G+7 multi-storey building of 15 m × 20 m in plan area has been chosen and modelled using ETABS, and four new plans were modelled in the same earthquake zone area.
Abstract: Multi-storey buildings tend to get damaged mainly during earthquake. Seismic analysis is a tool for the estimation of structural response in the process of designing earthquake resistant structures and/or retrofitting vulnerable existing structures. The principle purpose of this work is to analyze and design a building with a shear wall and also to find the appropriate position of shear wall that result in maximum resistance towards lateral forces and minimum displacement of the structure. In this study, a G+7 multi-storey building of 15 m ×20 m in plan area has been chosen and modelled using ETABS. The developed model was validated by solving manually and the results were validated in ETABS. Thereafter, 4 different new plans were modelled in ETABS located in the same earthquake zone area. These plans have shear wall concepts are implemented on the building at four different locations. Seismic, vibration and response spectrum analysis were performed on these structures. Salient parameters such as storey stiffness, storey displacement and storey drift were computed using the ETABS model. These were compared with that of the frame having no shear walls. By comparing the results obtained at different shear wall locations, the best plan with the shear wall having minimum lateral storey displacement and maximum stiffness is suggested for this location.


Journal ArticleDOI
TL;DR: In this article, the authors assess the inelastic capacity of structures in regions where earthquakes are prevalent, in order to determine the capacity of the structures in terms of their resilience to earthquakes.
Abstract: Seismic assessment is of critical importance for structures in regions where earthquakes are prevalent. Such assessment in terms of determining the inelastic capacity of structures is ofte...