Investigation Moisture Content Effect on Bearing Capacity Failure of Strip Footing Rested on Silty Sand Soil Based on Crack Characteristics Assessment Using Non-Destructive Test

• Published in: Procedia Structural Integrity
• Main Author: Imam Robit N.N.; Nujid M.M.; Md Nor N.S.; Tholibon D.A.; Mukhlisin M.
• Format: Conference paper
• Language: English
• Published: Elsevier B.V. 2023
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85171981852&doi=10.1016%2fj.prostr.2023.07.064&partnerID=40&md5=071e9307732fd5c50ae0ee76bd4bab3f

Structure stability mostly relies on soil foundation from carrying and transferring load to the hard layer or stratum of rock or soil. The shallow foundation of the structure may fail in the bearing capacity of soil due to exceeding the ultimate limit state and serviceability limit state, causing structural failure or damage. Furthermore, the presence of structural crack can be due to moisture content variation. The effect of moisture content variation in dry and wet conditions for fully saturated (degree of saturation, Sr = 100%) and unsaturated soils (degree of saturation, Sr = 0%) on the properties of soil ground and the whole building cause soil deformation and differential settlement. This study aims to investigate the effect of moisture content variation on bearing capacity of strip footing on silty sand based on non-destructive test data information. A non-destructive test was conducted to evaluate the compressive strength of the concrete for a building from a site study selected by a rebound hammer test. Visual inspection was carried out and structural assessment of the building such as location with cracks, the length, width, condition and pattern of the crack were recorded to classify the severity of the cracks. Geotechnical properties of soil from the site area were obtained from experiments in accordance with standards. The bearing capacity failure of the strip foundation with a 2 m width resting on the ground surface was analyzed numerically using finite element software, and PLAXIS 3D was used during crack damage assessment and geotechnical investigation. Total displacement increases as moisture content and degree of saturation increase, increasing pore pressure and decreasing soil strength of soil. © 2023 Elsevier B.V.. All rights reserved.