@ ŒfÚŽGŽi˜ajF “ú–{’nkHŠwƒVƒ“ƒ|ƒWƒEƒ€u‰‰W VolF 7Šª ”NF 1986”N •ÅF 2089-2094•Å ’˜ŽÒi˜ajF - ƒ^ƒCƒgƒ‹i˜ajF - ´˜^i˜ajF
- ƒL[ƒ[ƒhi˜ajF - ŒfÚŽGŽi‰pjF PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒi‰pjF Hisahiro HIRAISHI, Masaya HIROSAWA, Tatsuro MUROTA, Hideo TSUKAGOSHI, Toshikazu KAWASHIMA ƒ^ƒCƒgƒ‹i‰pjF AN INVESTIGATION ON A TWELVE-STORY OFFICE BUILDING DAMEGED BY THE 1985 MEXICO EARTHQUAKE ´˜^i‰pjF
The 1985 Mexico Earthquake caused serious damages particularly on reinforced concrete buildings in Mexico City. This report describes the detailed damage observation and the analyses, and a plan for strengthening of a twelve-story reinforced concrete office building as a part of the technical cooperation. The following were derived from the observation and analyses. (1) Torsional vibration was considered to have occurred during the earthquake due to the existence of exterior brick walls. (2) Due to the wrong location of the cut-off of top reinforcements of beams, critical section occurred at the different location from that considered in the structural design. As a result, flexural strength of beams was extremely small value. (3) The base shear coefficients corresponding to the ultimate stage were given to be 0.07 and 0.08 for longitudinal and transverse directions, respectively. (4) Consequently, drastic increase in strength was required for the strengthening. ƒL[ƒ[ƒhi‰pjF - ‹LŽ–‹æ•ªF - ‹æ•ª @@@ˆÏˆõ‰ï˜_•¶W