The Local Strength mode is used to perform checks of the local strength in places where concentrated loads are transferred (from the bearing of beams, purlins, and other members) onto walls and columns. The mode implements requirements of Sec. 4.13, 4.14, 4.16 of SNiP II-22-81, KMK 2.03.07-98 (Sec. 7.13, 7.14, 7.16 of SP 15.13330). The simultaneous action of the local and main loads (Sec. 4.15 of SNiP II-22-81, KMK 2.03.07-98, Sec. 7.15 of SP 15.13330) is not checked. The distribution of pressure in places where the loads are transferred is assumed to be uniform throughout the whole transfer area.
The dialog box of this mode contains the following tabs:
The General tab contains general data on the structure and is almost identical to the respective tab of the Axially Compressed Columns mode.
The Load Arrangement tab is used to specify the value of the local load and to select its arrangement. Table below shows the available load arrangements and indicates (in brackets) the respective designs from Fig. 9 of SNiP II-22-81, KMK 2.03.07-98 (SP 15.13330) (an area where the load is applied is highlighted).
a) Local load throughout the width of an element |
According to Fig. 9,a |
b) Local edge load throughout the width of an element |
According to Fig. 9,b |
c) Local load at the end supports of beams and purlins |
According to Fig. 9,c |
d) Local load at the end supports of beams and purlins |
According to Fig. 9,c1 |
e) Local load on the corner of an element |
According to Fig. 9,d |
f) Local load applied to a part of the length and width of an element |
According to Fig. 9,e |
g) Local load within the protruding part of the wall |
According to Fig. 9,f |
h) Local load within a wall and its protruding part |
According to Fig. 9,g |
The Damage tab provides data on the mechanical damages which can be taken into account when checking the local strength. Mechanical damages of the masonry are assumed uniform throughout the whole volume of the checked fragment.