Title: Finite Element Analyses of Seismic Response of a 22-story RC Wall Building subjected to Drying Shrinkage Cracking and Application of SCRPCC
Author(s): Kitazawa, K.; Sato, Y.; Naganuma, K.; Kaneko, Y.
Publication: Symposium Paper
Appears on pages(s): 272-281
Keywords: Drying shrinkage crack, Steel chip reinforced polymer cementitious composite, 3D FEM
This paper attempts to investigate the effectiveness of Steel Chip Reinforced Polymer
Cementitious Composite (SCRPCC) to reduce the seismic drift of high rise building by
employing finite element method. Steel chips are produced when a steel plate is precisely
machined on a numerically controlled lathe. To verify the influence of drying shrinkage on the
structural performance of entire buildings, seismic response analyses of a 22-story RC wall
building subject to drying shrinkage cracking are conducted.
The analyzed building was damaged in 1985 Mexico Earthquake. In the analyses, drying
shrinkage is considered by conducting the drying shrinkage cracking analyses before dynamic
seismic vibration analyses to examine the influence of drying shrinkage. For each case of the
analyses, two kinds of materials are used; ordinary concrete and SCRPCC.
The shrinkage of 8,400-day drying period induces cracks in the walls of top floor as well as
the first floor. The maximum drift of the building is increased in the NS direction by the
shrinkage cracking while reduced in the EW direction. The maximum total drift of the building
during the seismic vibration is reduced by 3.5% in the NS direction and 8.9% in the EW
direction by using the SCRPCC instead of the ordinary concrete. The average crack width of
the building is reduced by 11.1% by the SCRPCC.