アカプルコ2008の梗概 Abstract for IASS2008

Here is the short abstract for Acapulco IASS 2008 in Mexico.
the deadline for extended abstract n full paper is 15th next month.


here is the short abstract
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Abstract of Paper for IASS 2008

Acapulco-Mexico, 27-31 October 2008

ELASTO-PLASTIC response OF REINFORCED CONCRETE COOLING TOWER UNDER severe earthquake motions

Shiro KATO and Rachana HIN

Toyohashi University of Technology, Tempaku, Toyohashi, Japan

E-mail: ○○

ABSTRACT

Although many researches have been conducted on RC cooling tower, the earthquake response and its effects have not jet been broadly discussed. On the other hand, construction of cooling towers has significantly increased in country of high seismicity. In such case, seismic analysis on RC cooling tower is absolutely necessary.

This study reports in detail the elasto-plastic nonlinear behavior of a reinforced concrete cooling tower, more than 150m tall, supported at a lower lintel by columns, under cyclic loads of earthquake motion. Based on Lattice Model as the constitutive equations for concrete, the analysis considers the effects of cracks and tension stiffening due to tension, and crash due to uni- and bi-axial compressions of concrete as well as yielding of reinforcement. The analysis is based on isoparametric shell elements modeling with 9-note Heterosis element for the shelled plane and fiber element for the circular stiffening rings at the top and lower cornices, columns and footing ring.

As the result of the analysis, the elasto-plastic behavior of cooling tower under static weight loading together with earthquake motion and the collapsing mechanism of such structure is made clear. By comparing the evaluated seismic capacity with the wind-resistant capacity from previous study, the suggestion for designing the cooling tower against severe earthquake motion has been drawn and the relative merits of the design against these two loads is discussed.

Key Words: Reinforced Concrete Cooling Tower, Earthquake Response, Ring Typed-Lattice Model, Dynamic Analysis, seismic capacity, wind-resistant capacity

1)* Corresponding author. Tel.:+ 81 532 ○○; Fax: + 81 532 ○○

E-mail Address: ○○

Postal Address: Toyohashi University of Technology, Tempaku, Toyohashi, 441-8580, Japan