Raw data of the cyclic tests on the beam specimens

Abstract

This dataset contains the raw data of the cyclic tests on the beam specimens. Two concrete mixes were investigated (C30 and C80). The specimens are named with the concrete type followed by a roman number (e.g. C30-II). The specimens were loaded with a sinusoidal load, oscillating between a relative minimum and a maximum load level. The minimum load level was aimed to be 5% of the compressive strength and the maximum load level 75%. An exception was beam C80-VI. A maximum load level of 65 % was chosen here. Each beam was from a different concrete batch and for determining the compressive strength of the respective concrete batch, three cyclindrical specimens were cast together with each beam. Before starting the beam test, the compressive strength was determined on the cylindrical specimens. In a first step, the beams were prestressed. Afterwards a vertical prestressing was applied to achieve a mean loading in the specimens. In the third step, the fatigue test was started. The Layout of all sensors is provided in a separate file here. The data of the sensors can be found in .ASC files.

Following channels are used in each file: Zeit 1 (Standardmessrate) [time 1 (standard measuring rate)] in s, DMS_1 [strain gage 1] in micrometer/m, DMS_2 [strain gage 2] in micrometer/m, DMS_3 [strain gage 3] in micrometer/m, DMS_4 [strain gage 4] in micrometer/m, DMS_5 [strain gage 5] in micrometer/m, DMS_6 [strain gage 6] in micrometer/m, DMS_7 [strain gage 7] in micrometer/m, DMS_8 [strain gage 8] in micrometer/m, DMS_9 [strain gage 9] in micrometer/m, DMS_10 [strain gage 10] in micrometer/m, DMS_11 [strain gage 11] in micrometer/m, DMS_12 [strain gage 12] in micrometer/m, DMS_13 [strain gage 13] in micrometer/m, DMS_14 [strain gage 14] in micrometer/m, DMS-Komp [strain gage for temperature compensation] in micrometer/m, Zeit 2 (Standardmessrate) [time 2 (standard measuring rate)] in s, DMS-q-west [strain gage transversal, west side] in micrometer/m, DMS-q-ost [strain gage transversal, east side] in micrometer/m, Zeit 3 (Standardmessrate) [time 3 (standard measuring rate)] in s, Zeit 3 (langsame Messrate) [time 3 (slow measuring rate)] in s, Auflager_1 [support force 1] in kN, Auflager_2 [support force 2] in kN, Auflager_3 [support force 3] in kN, Auflager_4 [support force 4] in kN, Temp4 [temperature 4] in °C, Temp3 [temperature 3] in °C, Temp2 [temperature 2] in °C, Temp1 [temperature 1] in °C, Zeit 5 (Standardmessrate) [time 5 (standard measuring rate)] in s, Nord_Vorspannen [prestressing force northern threaded rod] in kN, Süd_Vorspannen [prestressing force southernthreaded rod] in kN, Öldruck Zylinder [hydraulik pressure of prestressing cylinder] in kN, Temp-Luft [ambient temperature] in °C, Summe Auflager [sum of support forces] in kN

The fatigue load was applied by beams of imbalance motors which were regulateded by a control software. The data from the control software can be found in the .CSV files.

Following channels are used in these files: Zeit [time] in s, Soll-Drehzahl [target frequency] in Hz, Ist-Amplitude Regelwert [current force oscillation] in kN, Ist-Drehzahl Motor 1 [current frequency of motor 1] in Hz, Ist-Drehzahl Motor 2 [current frequency of motor 2] in Hz, Ist-Drehzahl Motor 3 [current frequency of motor 3] in Hz, Ist-Drehzahl Motor 4 [current frequency of motor 4] in Hz, Ist-Phasenversatz M1-M2 [current phase offset betweeen motor 1 and motor 2] in °, Ist-Phasenversatz M1-M3 [current phase offset betweeen motor 1 and motor 3] in °, Ist-Phasenversatz M1-M4 [current phase offset betweeen motor 1 and motor 4] in °, Lastwechsel [load cycles], AI0 [reaction force 1] in kN, AI1 [reaction force 2] in kN, AI2 [reaction force 3] in kN, AI3 [reaction force 4] in kN, AI0 RMS [current average force oscillation of the supports] in kN

For some beam specimens multiple runs were needed to achieve fatigue failure because of unplanned stops of the imbalance motors. The data files of these runs are named X_Run01...X-Run02 accordingly.