Page 134 - Advanced Design Examples of Seismic Retrofit of Structures

126 Advanced Design Examples of Seismic Retrofit of Structures

TABLE 3.3 Details of Material Testing Based on Code 360 [1]

Required
Item Tests Number
1 Determination of the size and type of bars in columns 70
2 Determination of the size and type of bars in RC shear walls 20
and their thickness
3 Determination of the size and type of bars in diaphragms 6
and their thickness
4 Determination of the size and type of bars in beams 2
5 Determination of the size and type of bars in stairs and the 2
diaphragm thickness
6 Determination of the size and type of bars in columns ends 4
7 Determination of the size of foundation 15
8 Coring of column (66), shear walls (20), diaphragms (6), 66
stairs (2), foundation (8), and characteristic compressive
strength of concrete
9 Schmitt hammer test on columns, shear walls and 116
diaphragm
10 Geotechnical bore hole and the related studies. This hole 1
with 15m in depth is to determine the soil characteristics
and the groundwater level. Also, soil layers, physical,
chemical and mechanical properties of soils can be
determined. The allowable stress, settlements properties,
Chloride and Sulfate, lateral pressure coefficient can also be
determined
11 Tensile testing of bars and determination of tensile strength 4

3.2.1.1 Characteristic Compressive Strength of Concrete
Based on the results of coring from 19 samples of columns, 9 samples from
shear walls, 5 samples from diaphragms, and 53 and 20 Schmitt hammer tests
on columns and shear walls, respectively, the characteristic compressive
strength of concrete is determined based the method in Chapter 2 of Code
360 (see Table 3.4).

3.2.1.2 Characteristics of Bars
Based on the tensile tests on two unribbed φ14mm and φ20mm bars, these bars
are made of AI (yield strength of 240MPa) and AII (yield strength of 300MPa).
Conservatively, all the unribbed bars are assumed to be AI. Also, based on the