JOURNAL OF EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION Vol. 31 No. 5 Oct /35 TU3521 P315.

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1 JOURNAL OF EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION Vol. 31 No. 5 Oct /35 TU3521 P A Earthquake simulation shaking table test and analysis of a complex high-rise building with high transfer floor and gradually decreasing stiffness MA Yuhong HAN Fuping HUANG Xiangyun CHEN Jianqiu TAN Ping LI Bingbing Earthquake Engineering Research & Test Center Key Laboratory of Seismic Control and Structural Safety Guangzhou University Guangzhou China Abstract Seismic behavior of a complex high-rise frame-shear wall structure with gradually decreasing stiffness and high transfer floor is studied on the shaking table. A 1 35 scaleed model of the building is constructed the dynamic characteristics and earthquake responses of the model under three earthquake ground motions which include one synthetic ground motion and two natural ground motions are researched. The results of test and finite element analysis of the model show that the seismic behavior of the buildings basically satisfies the requirements of the code for seismic design of the buildings because of the gradually decreasing stiffness in the upper parts of the structure the apparent seismic-whiplash-effect shows on the top of the structure the first floor the transfer floor and its adjacent floor are seismic weak floors of the building which should be partially strengthened to avoid the potential seismic risk and to increase the seismic capacity of the building. Key words gradually decreasing stiffness high transfer floor frame-shear wall shaking table test K K C myh_200@ yahoo. com. cn

2 m m m g III Table 1 1 Similitude coefficient between model and prototype S l S E S m S a = S E S 2 l /S m S t = S l /S 槡 a S f = 1 /S t / 1 /35 1 / /

3 III Northridge San Fernando 3 Y Z X g g 1 Northridge 2 San Fernando X Y 1 X + Y X + Y + Z Fig. 1 The test model fixed on the shaking table g X Y X + Y X + Y + Z Fig. 2 2 Plane figures of accelerometers and displacement sensors

4 78 31 Fig. 3 3 The input horizontal earthquake ground motions g 0. 1 ~ 40 Hz X Y Fig. 4 4 Test result of vibration mode of the building model 5 10% % % 15. 8% 3. 2 X Y 7 2 3

5 5 79 X Y X Y Fig Test and computation results of frequency Fig. 6 Frequencies under three levels of earthquake Fig. 7 7 Maximum acceleration responses of the model X Y 2 8 X Table 2 Average values of acceleration nmplification 2 Y conefficient on too floor 4 X Y X Y Y X Y X

6 80 31 Fig. 8 8 Maximum relative displacements of the model /834 1 / Table 3 3 Maximum displacement responses of the model mm g mm rad X /2253 Y /1224 X /1935 Y /760 X /1844 Y /1228 X /872 Y /836 X /1292 Y /549 X /713 Y /811 X /384 Y /344

5 81 0. 8 10-3 rad 1. 43 10-3 rad 3. 7 10-3 rad 15 23 X Y 1. 05 1. 25 X Y 1.

10 Failures of the column on the Fig. 11 Failures of the column on the 6th Fig.

7 rad rad rad X Y X Y X Y Y X RC Fig. 9 9 Vertical strain time histories of shear wall on the 5th floor under the small moderate and major earthquakes Fig. 10 Failures of the column on the Fig. 11 Failures of the column on the 6th Fig. 12 Failures of the shear wall on 8th floor after moderate earthquake floor after major earthquake the 7th floor after major earthquake

8 ETABS % 20% 13 Fig. 13 Comparison between measured and calculated values of maximal acceleration relative displacement and story drift under minor earthquake

9 Fig. 14 Comparison between measured and calculated values of the time-histories under earthquake ground motion / % % 15. 8% 3 3 Y 3 X /554 1 / J J JGJ S M J J GB S

43 14. 45 3 7 220 1 2 cm /s 2 1. 5 3 1 4 c d 1 /40 1 /4 1 /9 600 0. 129 6 7 1 /6 400 1 /256 000 1. 5 2 2 2. 1 /m /Hz /kn / kn m 6 6 0. 1 ~ 50 600 1 80

43 14. 45 3 7 220 1 2 cm /s 2 1. 5 3 1 4 c d 1 /40 1 /4 1 /9 600 0. 129 6 7 1 /6 400 1 /256 000 1. 5 2 2 2. 1 /m /Hz /kn / kn m 6 6 0. 1 ~ 50 600 1 80 43 14 2013 7 Building Structure Vol. 43 No. 14 Jul. 2013 * 1 1 1 2 3 3 3 2 2 1 100013 2 430022 3 200002 1 40 ETABS ABAQUS TU355 TU317 +. 1 A 1002-848X 2013 14-0044-04 Compairion study between the shaking