In the present study, two new hybrid approaches are proposed for predicting peak ground acceleration (PGA) parameter. The proposed approaches are based on the combinations of Adaptive Neuro-Fuzzy System (ANFIS) with Genetic Algorithm (GA), and with Particle Swarm Optimization (PSO). In these approaches, the PSO and GA algorithms are employed to enhance the accuracy of ANFIS model. To develop hy...

The seismic response of buildings resting on liquefiable soil is a complex problem that still poorly understood despite numerous studies the topic. This paper attempts to enhance understanding this phenomenon by simulating an RC structure and subjected shakes. solid-fluid fully coupled analysis was conducted with OpenSeesPL utilizing 58 earthquake records simulate wide range shaking scenarios. ...

In this study, an existing hospital structure has been evaluated with incremental dynamic analysis (IDA). This building is accommodated in Karaj with soil type II. At first, two 2-D frames along X, Y direction are selected. Then, five performance levels are determined according to “Rehabilitation Code for Existing Buildings (Publication No. 360) including Immediate Operational (IO), Limited Dam...

This article isolates the systematic effects of the soil profile on earthquake ground motions recorded at vertical seismic arrays. An empirical Green’s function is calculated for a soil interval between two sensors in a vertical array. The estimation technique used here falls into the category of site-response estimates but differs from the standard spectral ratio methods in that an extended We...

Abstract In the seismic design of long-span bridges, classic bi-linear model was used to simulate frictional restoring force rubber bearings. However, in actual earthquake, bearing suffered fluctuating axial pressure even separated from beam when vertical component earthquake too strong. Employing for may incorrectly estimate response bearings, as well whole bridge. This paper developed a nonli...

Abstract Raspberry Shake (RS) seismographs offer the potential for affordable and citizen-led seismic monitoring in areas with few publicly available seismometers, especially previously quiescent regions experiencing induced seismicity. However, their scientific regulatory remains largely untested. We examine ground motions recorded by 11 RS one broadband station within 15 km of United Downs De...

growing environmental and social concerns, both on the part of decision makers and public opinion, have brought a new perspective to the perception of hazard assessments a valid alternative in the long-term, and an effective complement in short and medium terms, to traditional design procedure for a resistant and safe environment. results of the gradual development of research on the probabilis...

Abstract. Damage in Armenia, Colombia, for the 25 January 1999 (Mw=6.2, peak ground acceleration (PGA) 580 Gal) event was disproportionate. We analyze damage report as a function of number stories and construction age buildings. recovered two vulnerability evaluations made Armenia 1993 2004. compare results evaluation with observed show that could have predicted relative frequency 1999. Our bui...