Review on the rocking wall systems as a self-centering mechanism and its interaction with floor diaphragm in precast concrete structures

Mohd Asha’Ari Masrom,Nor Hayati Abdul Hamid

doi:10.1590/1679-78256115

Mohd Asha’Ari Masrom, Nor Hayati Abdul Hamid

Open Access

https://doi.org/10.1590/1679-78256115

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Abstract

Abstract The severe damage of precast concrete wall structures that have been recorded in the past earthquake has led to the innovation of the rocking wall concept which can demonstrate free or minimum damage aftershock of an earthquake. Furthermore, extensive research works have been well conducted in the past three decades on the establishment of precast rocking wall systems, designs, details, and techniques. Despite this extensive development, little attention has been devoted to investigate the interaction between the rocking wall systems and the flooring diaphragm. The historical perspective on the development of rocking wall systems over the past few decades in the precast concrete structures is presented. Subsequently, the limited research works on the interaction of precast rocking wall to the floor diaphragm are described. Apart from that, this paper attempts to highlight the application of rocking wall systems in the context of precast connection for the precast load-bearing structures. In this contribution, the precast rocking wall-floor connection for precast load-bearing structures is proposed and presented in this paper.

Highlights

According to the ACI 318 (Chapter 21), two alternatives for construction of precast concrete buildings under seismic regions which is emulative and non-emulative design are permitted (ACI 318-11, 2011)
The connection type will determine how the lateral inertia forces from the floor diaphragm are transferred to the wall
A substantial amount of research conducted pertaining to precast concrete rocking wall systems has spanned over three decades worldwide

Summary

Graphical Abstract

This design is to ensure that the “weakest link of the chain” in the structural system is positioned where the designer intended to behave as a ductile “fuse” and prevent the structure from undesired brittle failure mechanisms In this respect, the emulative approach in the precast concrete wall is intentionally designed to dissipate seismic energy through inelastic behavior of structural elements. Using the unbonded post-tensioning at the center of precast concrete walls can prevent the collapse of the structures through a self-centering mechanism which exhibit elastic behavior by helping them to mitigate the sustained damage This type of wall is known as rocking wall which is not connected rigidly to the foundation beam and allows discontinuous between the bottom of the wall and foundation. Further application of this wall system into the precast load-bearing structures is presented

DEVELOPMENT OF SELF-CENTERING SYSTEM IN PRECAST CONCRETE SHEAR WALL

INTERACTION BETWEEN ROCKING WALL SYSTEMS AND FLOOR DIAPHRAGM

ROCKING WALL SYSTEM IN PRECAST CONCRETE LOAD BEARING STRUCTURES

Findings

CONCLUSIONS