Forward directivity near-fault and far-fault ground motion effects on the behavior of reinforced concrete wall tall buildings with one and more plastic hinges

2015 ◽  
Vol 25 (11) ◽  
pp. 519-539 ◽  
Author(s):  
Hamid Beiraghi ◽  
Ali Kheyroddin ◽  
Mohammad Ali Kafi
Keyword(s):  
Reinforced Concrete ◽  
Ground Motion ◽  
Tall Buildings ◽  
Concrete Wall ◽  
Plastic Hinges ◽  
Near Fault ◽  
Forward Directivity ◽  
Reinforced Concrete Wall ◽  
Far Fault

scholarly journals Design strategies to achieve target collapse risks for reinforced concrete wall buildings in sedimentary basins

2020 ◽  
Vol 36 (3) ◽  
pp. 1038-1073 ◽  
Author(s):  
Nasser A Marafi ◽  
Andrew J Makdisi ◽  
Jeffrey W Berman ◽  
Marc O Eberhard
Keyword(s):  
Reinforced Concrete ◽  
Seismic Hazard ◽  
Ground Motion ◽  
Sedimentary Basins ◽  
Design Strategies ◽  
Concrete Wall ◽  
Cross Sectional ◽  
Drift Capacity ◽  
Basin Effects ◽  
Reinforced Concrete Wall

Studies of recorded ground motions and simulations have shown that deep sedimentary basins can greatly increase the damage expected during earthquakes. Unlike past earthquake design provisions, future ones are likely to consider basin effects, but the consequences of accounting for these effects are uncertain. This article quantifies the impacts of basin amplification on the collapse risk of 4- to 24-story reinforced concrete wall building archetypes in the uncoupled direction. These buildings were designed for the seismic hazard level in Seattle according to the ASCE 7-16 design provisions, which neglect basin effects. For ground motion map frameworks that do consider basin effects (2018 USGS National Seismic Hazard Model), the average collapse risk for these structures would be 2.1% in 50 years, which exceeds the target value of 1%. It is shown that this 1% target could be achieved by: (1) increasing the design forces by 25%, (2) decreasing the drift limits from 2.0% to 1.25%, or (3) increasing the median drift capacity of the gravity systems to exceed 9%. The implications for these design changes are quantified in terms of the cross-sectional area of the walls, longitudinal reinforcement, and usable floor space. It is also shown that the collapse risk increases to 2.8% when the results of physics-based ground motion simulations are used for the large-magnitude Cascadia subduction interface earthquake contribution to the hazard. In this case, it is necessary to combine large changes in the drift capacities, design forces, and/or drift limits to meet the collapse risk target.

scholarly journals Evaluation of a Reinforced Concrete Wall Macroscopic Model for Coupled Nonlinear Shear-Flexure Interaction Response

2018 ◽  
Vol 20 (1) ◽  
pp. 41
Author(s):  
Joko Purnomo ◽  
Jimmy Chandra
Keyword(s):  
Reinforced Concrete ◽  
Nonlinear Behavior ◽  
Tall Buildings ◽  
Macroscopic Model ◽  
Concrete Wall ◽  
Total Displacement ◽  
Reinforced Concrete Wall ◽  
Strength And Stiffness ◽  
Nonlinear Shear ◽  
Line Elements

Reinforced concrete shear wall (RC wall) is an important element in tall buildings, which provides strength and stiffness against lateral loadings, e.g. earthquake and wind. Numerous researches have been conducted to study its nonlinear behavior via microscopic and macroscopic model. The later approach is currently being widely explored since it has many advantages compared to the preceding models. A well-known macroscopic model, namely Shear-Flexure-Interaction Multiple-Vertical-Line-Elements-Model (SFI-MVLEM) in the open source platform Open Sees, is capable of simulating the coupled nonlinear shear-flexure interaction response in the RC wall. This paper presents an evaluation to the applicability of SFI-MVLEM model to predict the coupled nonlinear shear-flexure behavior of RC wall specimens compared to experimental results in available literature. The analysis results show that the model is able to predict the behavior of RC wall considerably accurate in terms of hysteretic curves, cracking patterns, and contributions of shear and flexural displacement to total displacement.

Reinforced Concrete Wall Form Design Program

1992 ◽  
Author(s):  
Leo D. McKinley
Keyword(s):  
Reinforced Concrete ◽  
Concrete Wall ◽  
Design Program ◽  
Reinforced Concrete Wall ◽  
Form Design
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