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Proceedings of the International Conference on
Advances and New Challenges in Earthquake 51 9
Engineering Research, Hong Kong Volume
SEISMIC RELIABILITY ANALYSIS OF
MULTISTORY ISOLATED BRICK BUILDINGS
Lingxin ZHANG Minzheng ZHANG Jinren JIANG and Jiepmg LIU
Institute of Engineering Mechanics, China Seismological Bureau, Harbin, China 150080
ABSTRACT
This paper analyzes the seismic reliability of four multistory isolated brick buildings with different
story numbers and design intensities by Latin Hypercube Sampling technique and nonlinear seismic
time history response analysis. And the results of the isolated buildings and the corresponding
buildings without isolation are compared. On the basis of the comparative results, the specific
suggestions for the seismic design of the isolated brick buildings are proposed.
1 INTRODUCTION
With the development of structural isolation technique, people have recognized that using the isolation
technique can mitigate effectively damage to the buildings subjected to earthquake. Butlt is not clear
what the seismic safety of the isolated buildings can be increased, compared with the corresponding
buildings without isolation. This paper studies the safety of the isolated buildings by taking four
multistory brick buildings with laminated rubber bearings as examples and analyzing their seismic
reliabilities. The seismic reliability is analyzed by Latin Hypercube Sampling technique and nonlinear
seismic time history response analysis. In the analysis, the uncertainties of earthquake load and
structural parameters are considered.
2 FOUR MULTISTORY BRICK BUILDINGS WITH LAMINATED RUBBER BEARINGS
In order to evaluate the seismic reliability of multistory isolated brick buildings, a set of representative structures
needs to be established according to Latin Hypercube Sampling technique. For this reason, we regard multistory
isolated dwelling brick buildings as examples, and take the maximum story number of the brick buildings for various
intensities according to Chinese " L Code for seismic design of buildings" (GBJ11-89). Thus, four multistory dwelling
brick buildings with laminated rubber bearings are chosen, which are an eight-story building for intensity VI, a
seven-story building for intensity W, a six-story building for intensity Vffl, and a four-story building for intensity DC,
respectively. Taking use of the typical common design parametric values of multistory dwelling bnck buildings, four
representative multistory dwelling brick buildings, as shown in table 1, are established by Latin Hypercube Sampling
technique. The seismic design of multistory dwelling brick buildings is conducted according to Chinese "Code for
seismic design of buildings"(GBJll-89). The thickness of the inner wall is 24cm, but 37crn for the first and second
floors of four-story building designed for intensity IX. The grade of mortar is usually M2.5, but it can be increased to
M5.0 and M10.0 according to the requirement of seismic design. The transversal wall is taken as the
load-bearing wall in the four buildings.
The thickness of laminated rubber bearing is 50mm.
Sponsored by National Natural Science Foundation of China, Grant No. 59978047