In areas of high seismicity in the United States, design many existing tall buildings followed guidelines that do not provide an explicit understanding performance during major earthquakes. This paper presents assessment seismic and strategies for increased resilience a case study city, San Francisco, where archetype building is designed based on inventory stock. A 40-story moment-resisting frame system selected as representative building. The rectangular plan represents state construction...

Summary This study assesses the seismic performance of a hybrid coupled wall (HCW) system with replaceable steel coupling beams (RSCBs) at four intensities ground motion shaking. The HCW is benchmarked against traditional reinforced concrete (RCW). Nonlinear numerical models are developed in OpenSees for representative elevation prototype 11‐story building designed per modern Chinese codes. Performance assessed via nonlinear dynamic analysis. results indicate that both systems can adequately...

While modern seismic design codes intend to ensure life-safety in extreme earthquakes, policy-makers are moving toward performance objectives stated terms of acceptable recovery times. This article describes a framework probabilistically model the post-earthquake buildings and provide quantitative measures, expressed downtime, that useful for decision-making. Downtime estimates include time mobilizing resources after an earthquake conduct necessary repairs. The proposed advances...

The ability to conduct accurate regional seismic risk assessments is key informing a risk-reduction policy and fostering community resilience. This paper presents machine learning-based framework predict building's postearthquake damage state using structural properties ground motion intensity measures as model inputs. learning techniques assessed, namely, logistic regression, k-nearest neighbors, decision tree, random forest, AdaBoost, gradient boosting, are trained dataset of nonlinear...

Current building code requirements for seismic design are primarily intended to minimize life-safety risks due structural damage under extreme earthquakes. While tall buildings designed current standards expected achieve the goal, this study estimates that they may require up 7.5 months of repair return functionality after a design-level earthquake (roughly equivalent ground motion shaking with 10% probability exceedance in 50 years), and over 1 year risk-targeted maximum considered 2%–4%...

Probabilistic models in performance-based earthquake engineering propagate uncertainties from key input parameters to output performance measures. Although these integrate important sources of uncertainty, several model are deterministic and remain constant despite the difficulty defining them with high confidence based on empirical or theoretical arguments. This study employs variance-based sensitivity analysis investigate how uncertainty (1) demands, (2) fragility functions, (3) building...

This study quantitatively assesses the impact of seismic design strategies on performance reinforced concrete (RC) dual wall–frame office buildings by comparing direct and indirect economic losses downtime in life-cycle terms. A high-rise archetype building located Santiago, Chile, stiff soil was evaluated as a benchmark case study. Three to potentially enhance designed conventionally were explored: (i) incorporating fluid viscous dampers (FVDs) lateral load-resisting structure; (ii)...

Abstract Data‐driven models for seismic damage and loss assessment of buildings have become more common in recent years due to the availability large repositories recorded synthetic ground motions coupled with structural response simulation data. This paper explores benefits using bivariate multivariate fragility functions estimate earthquake‐induced economic high‐rise buildings. The dataset used this study encompasses 15,000 simulations modern reinforced concrete shear wall ranging from...

Summary Studies of recorded ground motions and simulations have shown that deep sedimentary basins can greatly increase the intensity earthquake within a period range approximately 1–4 s, but economic impacts basin effects are uncertain. This paper estimates key indicators seismic performance, expressed in terms earthquake‐induced repair costs, using empirical simulated hazard characterizations account for basins. The methodology used is general, made series eight‐ to 24‐story residential...

Summary An innovative hybrid coupled wall system consists of reinforced concrete (RC) piers connected with replaceable steel coupling beams (RSCBs) throughout their height. The RSCBs are designed a central “fuse” shear link to beam segments at both ends, which capacity remain elastic. During damaging earthquake, the fuse links yield and dissipate seismic energy, once damaged, they can be easily replaced due specialized link‐to‐beam connection details. Therefore, this is expected provide...

Abstract Southwest British Columbia has the potential to experience large‐magnitude earthquakes generated by Cascadia Subduction Zone (CSZ). Buildings in Metro Vancouver are particularly vulnerable these because region lies above Georgia sedimentary basin, which can amplify intensity of ground motions, at medium‐to‐long periods. Earthquake design provisions Canada neglect basin amplification and consequences accounting for effects uncertain. By leveraging a suite physics‐based simulations M9...

Past earthquakes have illustrated the impacts of reduced hospital functionality due to physical damage resulting in a health service deficit immediately after major seismic event. In this article, methodology was developed quantify care anticipated loss emergency department (ED) and surge demand regional an earthquake scenario. Earthquake-induced patient arrivals were calculated using multi-severity casualty estimation for catchment area hospital. The patients (demand) then compared ability...

Canada’s 2020 national seismic hazard model (CSHM 2020) provides estimates for interface Cascadia Subduction Zone (CSZ) earthquakes in southwestern Canada using four ground motion models (GMMs) with equal weights. Two out of the GMMs were derived data primarily from subduction Japan so their use CSHM includes a “Japan-to-Cascadia” factor to account local site conditions. Despite this regional factor, do not explicitly consider amplification effects Georgia sedimentary basin below Metro...

Abstract Past earthquakes have highlighted the impact of prolonged downtime on community recovery. The introduction performance objectives expressed in terms recovery time has been identified as a key goal for next generation building codes. Recent development estimation frameworks now allows discussion how to use estimates (1) establish recovery‐targeted and (2) assess functional buildings designed with modern code provisions. In this paper, we employ methods adapted from life‐safety...

Tall residential RC shear wall buildings (RCSW), which are predominant in Metro Vancouver, have the potential to experience large magnitude earthquakes generated by Cascadia Subduction Zone (CSZ). Furthermore, region lies above Georgia sedimentary basin, can amplify intensity of ground motions at medium long periods and resulting damage tall structures. This study provides insights into effects basin amplification on (1) spectral accelerations associated with 9 (M9) CSZ earthquakes, (2)...