Material strength safety factors for the seismic safety assessment of existing RC buildings

Abstract

h i g h l i g h t sSafety factors are proposed to characterize material strength in existing buildings. The uncertainty due to the number of tests and strength variability are considered. The safety factors are compatible with EC8/3 seismic safety assessment methods. Safety factors and survey plans are defined for concrete compressive strength. Safety factors and survey plans are defined for reinforcing steel yield strength. a r t i c l e i n f o b s t r a c tNew material safety factors (CF mat ) are proposed to characterize material strength in existing buildings. These safety factors are developed in order to be compatible with seismic safety assessment procedures defined by current standards such as Eurocode 8 Part 3. The general theory behind the development of the CF mat safety factors considers the uncertainty associated to the number of surveyed structural elements and the inherent variability of the material strength under analysis. The CF mat safety factors are developed using a finite population approach where the material properties in a building are discretized by considering one value per element. The proposed theory is used to define specific CF mat values and survey plans for the concrete compressive strength and for the reinforcing steel yield strength.

Safety Factor Characterization of Landslide in Riau-West of Sumatra Highway

“…The shear strength equation in a review effective voltage that can be deployed ground, until the achievement of equilibrium conditions with regard to boundary safety factor [29], Eq.3.…”

“…In this program, the value entered (input) is as follows: Dimensions slope elevation, slope length, slope angle in the x and y-axis. Projections slope safety factor analysis using Software Slide 6.0 [29] is shown in Figure 3. Fig.…”

“…1. If FK> 1 has a stable kind of slope stability, while FK <1 occurrence of landslides on the slopes [29] [30]. The aim of the current research work is to identify the slope safety factor that experienced landslides in the research area.…”

Assessment of Strength Development at Hardened Stage on High-Strength Concrete Using NDT

“…In the context of the application of these two methods, Kazemi et al proposed a strength estimation formula based on the rebound value [18][19][20][21][22][23], and further studies also reported improved precision in strength estimation through analytical methods [24][25][26][27]. Alwash et al derived the relationship between the compressive strength and ultrasonic pulse velocity [28][29][30], and Phoon et al proposed modifications considering the influence of various materials such as cement and aggregate [31][32][33][34][35].…”

The Influence of Different Concrete Classes on the Seismic Response of A Seismically Isolated Building

“…One of the important factor that affects evaluation of the seismic performance of existing building is the concrete compressive strength (Pereira and Romao, 2016a;2016b). In the literature review, a number of research studies have been performed for investigating the influence of concrete strength on the structural performance.…”