Finite element nonlinear analysis of high-rise unreinforced masonry building

Abstract

A simple efficient algorithm based on compressive diagonal strength of unreinforced masonry walls is presented to determine capacity curve of unreinforced masonry building. The compressive strength is calculated based on a new close form solution. The new close form solution is determined based on predicted results using interface elements for modeling of mortar joints. Finite element method with two-noded linear elements is used for analyses. Different masonry structures, including low-and high-rise unreinforced masonry buildings, are analyzed using the new closed-form solution and the presented algorithm. A comparison of results of the present work with experimental data and other methods similar to the discrete element method show proper accuracy of the analyses in the present work. Consequently, the closed form solution with proposed algorithm can be used to satisfactorily analyze unreinforced masonry structures to predict the ultimate base shear force and the pushover curve. Hence, practicing engineers can determine the behavior of an URM building and its performance level with proper accuracy under seismic excitation using concepts described in the present work.

An Orthotropic Macromechanical Model With Damage for the Analysis of Masonry Structures

“…Discrete element [23] Equivalent frame [23] Equivalent frame [24] Proposed • Numerical analyses have been performed to test the capability of the proposed model of describing masonry nonlinear behavior. The comparison between numerical and experimental failure domains obtained under bi-axial stress states have highlighted the model ability in capturing influence of orientation of the applied stresses with respect to bed joints.…”

“…To further validate the proposed model, the response to lateral loads of a one-bay unreinforced masonry wall is analyzed and compared with that obtained by existing literature models [23,24]. Geometry of the structure (thickness t = 0.6 m) and loading conditions are shown in Figure 6(a).…”

Modified generalized pushover analysis for estimating longitudinal seismic demands of bridges with elevated pile foundation systems

“…However, NL-THA is time-consuming. As an efficient and economic method for seismic performance evaluation of structures, pushover analysis is favored by current structural engineers (Akhaveissy, 2012;Forcael, 2014).…”

“…However, NL-THA is time-consuming. As an efficient and economic method for seismic performance evaluation of structures, pushover analysis is favored by current structural engineers (Akhaveissy, 2012;Forcael, 2014).Pushover analysis in many cases will provide much more relevant information than an elastic static or even dynamic analysis, while in some other cases it will provide misleading results (Krawinkler, 1996). Traditional pushover analysis procedures are conducted with common lateral force patterns, such as first mode, inverted triangular, uniform, etc (Applied Technology Council, 2005).…”

Lateral vibration analysis of continuous bridges utilizing equal displacement rule

“…Therefore, to obtain the displacement demand of structure is an important step. Although analytical methods are widely utilized to calculate the displacement demand of structure, the analysis processes of currently available methods are relatively complex (Chopra and Goel, 2002;Wei, 2011;Akhaveissy, 2012). Hence, it is desired to develop a simplified method herein to obtain the displacement demand to facilitate displacement-based seismic design.…”