A novel mitigation measure for normal fault-induced deformations on pile-raft systems

作     者：Mohammadreza Jahanshahi Nowkandeh Mehdi Ashtiani Mohammadreza Jahanshahi Nowkandeh;Mehdi Ashtiani

作者机构：Faculty of Civil EngineeringBabol Noshirvani University of TechnologyBabolIran 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2024年第23卷第1期

页      面：15-33页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程] 

基　　金：Babol Noshirvani University of Technology under Grant No.P/M/1102 

主　　题：normal fault rupture failure mechanism pile-raft system pocket connection finite element modeling 

摘      要：Evidence from recent earthquakes has shown destructive consequences of fault-induced permanent ground movement on *** observations have increased the demand for improvements in the design of structures that are dramatically vulnerable to surface fault *** this study a novel connection between the raft and the piles is proposed to mitigate the hazards associated with a normal fault on pile-raft systems by means of 3D finite element(FE)*** embarking on the parametric study,the strain-softening constitutive law used for numerical modeling of the sand has been validated against centrifuge test *** exact location of the fix-head and unconnected pile-raft systems relative to the outcropping fault rupture in the free-field is parametrically investigated,revealing different failure *** performance of the proposed connection for protecting the pile-raft system against normal fault-induced deformations is assessed by comparing the geotechnical and structural responses of both types of *** results indicate that the pocket connection can relatively reduce the cap rotation and horizontal and vertical displacements of the raft in most *** proposed connection decreases the bending moment response of the piles to their bending moment capacity,verging on a fault offset of 0.6 m at bedrock.