TY  - Data
T1  - Experimental dataset for the demonstration project of Heihe Blagoveshchensk Heilongjiang (Amur River) Bridge (May 1, 2019- April 27, 2021)
A1  - bai ruiqiang
DO  - 10.12072/ncdc.nieer.db2825.2024
PY  - 2023
DA  - 2023-03-31
PB  - National Cryosphere Desert Data Center
AB  - This data set includes the indoor low speed impact test data of closed cell foam aluminum sandwich structure used to prevent drift ice impact and the field test data of structural response of No. 6 and No. 7 piers of Heihe Blagoveshchensk Heilongjiang (Amur River) Bridge.  The collection time for indoor test data is May 1st, 2019. The instrument and equipment used is a drop hammer testing machine. The impact hammer head of the testing machine is hemispherical, with a diameter of 50mm and a weight of 230kg. The inner and outer diameters of the rigid support plate are 100mm and 240mm respectively. Before the test, the impact hammer head is raised to the predetermined drop height through computer automatic control technology. In the experiment, the impact hammer falls freely and hits the central area of the specimen. Obtain initial impact energy or velocity by adjusting the preset height of the impact hammer.                       The collection time for on-site test data is from April 20, 2021 to April 27, 2021. The time accuracy of this data collection is 0.01 seconds. The spatial scope involves two test bridge piers. Since it does not involve three-dimensional spatial coordinates, this spatial accuracy is not considered. The vibration collector adopts the 941B ultra-low frequency vibration meter from the Institute of Engineering Mechanics, China Earthquake Administration. The 941B type vibration pickup belongs to the dynamic coil reciprocating vibration pickup. The principle of the vibration pickup is shown in Figure 2. When the switch 1 of the micro toggle switch is turned on, the resistance value of resistor RPl is small, so the damping constant D ≥ 1. The moving part of the vibration pickup constitutes a velocity pendulum, that is, the displacement of the pendulum is proportional to the speed of ground motion. The vibration pickup constitutes an accelerometer, and its output voltage is proportional to the acceleration of ground motion.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/49f7f4de-4d94-4957-93a0-0ef9bdc69822
ER  -