In order to firmly connect the building structure to th […]
In order to firmly connect the building structure to the seismic support, it is necessary to understand the installation requirements of the seismic support hanger. Most of the anti-vibration support hangers are firmly connected to the building structure. They are seismic support structures with seismic force as the main load. They are composed of anchors, reinforced booms, anti-seismic connecting members and seismic bracing. Therefore, in the earthquake, the building's electromechanical engineering facilities should be fully and reliably protected from earthquake forces from any horizontal direction.
The horizontal seismic force should be calculated according to the gravity load at rated load. The lateral seismic support of the main pipe shall be counted in the longitudinal horizontal seismic force without the seismic support branch pipe. The lateral and longitudinal seismic support hanger spacing of horizontal pipelines shall be calculated as follows:
Where l-horizontal pipeline lateral and longitudinal seismic support hanger spacing (m);
Lo—the maximum spacing (m) of the seismic support hangers can be determined as specified in Table 1 below;
aEK-horizontal seismic force comprehensive coefficient, when the coefficient is less than 1.0, the value is 1.0;
K—seismic bracing angle adjustment factor. When the ratio of the vertical length to the horizontal length of the diagonal bracing is 1.00, the adjustment coefficient is 1.00;
When the ratio of the vertical length of the diagonal bracing to the horizontal length is less than or equal to 1.50, the adjustment coefficient is 1.67;
When the diagonal length to horizontal length ratio is less than or equal to 2.00, the adjustment factor is 2.33.