Seismic performance of post and beam timber buildings I: model development and verification

This paper presents a structural model called “PB3D” to perform nonlinear time history analyses of post and beam timber buildings under seismic loads. The model treats the three-dimensional structure as an assembly of roof/floor diaphragms and wall subsystems. The roof/floor diaphragms are modeled b...

Full description

Saved in:
Bibliographic Details
Published in:Journal of wood science 2012-02, Vol.58 (1), p.20-30
Main Authors: Li, Minghao, Lam, Frank, Foschi, Ricardo O., Nakajima, Shiro, Nakagawa, Takafumi
Format: Article
Language:English
Subjects:
Aseismic buildings
Biomedical and Life Sciences
Characterization and Evaluation of Materials
Diaphragms
Earthquake loads
Earthquake prediction
Equations of motion
Finite element method
Floors
Life Sciences
Materials Science
Nonlinear analysis
Original Article
Seismic engineering
Seismic response
Shear forces
Sheathing
Stiffness
Subsystems
Three dimensional models
Timber (structural)
Wood Science & Technology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents a structural model called “PB3D” to perform nonlinear time history analyses of post and beam timber buildings under seismic loads. The model treats the three-dimensional structure as an assembly of roof/floor diaphragms and wall subsystems. The roof/floor diaphragms are modeled by beam elements and diagonal brace elements in order to take into account the in-plane stiffness. The wall system consists of vertical beam elements, for wall posts, as well as nonlinear shear springs to consider the contribution of diagonal wall bracing members or sheathing panels. The hysteretic characteristics of the shear springs are represented by a simplified, mechanics-based model named a “pseudo-nail”. Standard finite element procedure is used to construct the system’s equation of motion, which is solved by Newmark’s integration. The model was verified against shake test results of a three-story post and beam building subjected to strong ground motions scaled to the 1995 Kobe earthquake. Model predictions agreed very well with the test results in terms of base shear forces and inter-story drift responses. This model provides a robust and efficient tool to study the seismic behavior of post and beam timber buildings.
ISSN:1435-0211
1611-4663
DOI:10.1007/s10086-011-1219-5