عنوان

Analysis of repaired/strengthened R.C. structures using composite materials :

شماره

TLets532219

عنوان اصلي

Analysis of repaired/strengthened R.C. structures using composite materials :

نام عام مواد

[Thesis]

نام نخستين پديدآور

Abdullah, Ahmad Mahmoud

عنوان اصلي به قلم نويسنده ديگر

punching shear

نام ساير پديدآوران

Bailey, Colin ; Wu, Jack

نام ناشر، پخش کننده و غيره

University of Manchester

تاریخ نشرو بخش و غیره

2011

جزئيات پايان نامه و نوع درجه آن

Thesis (Ph.D.)

امتياز متن

2011

متن يادداشت

Fibre reinforced plastics (FRP) have been used widely in civil engineering in order to improve the structural response (deformation and stress). Most of the current codes for the strengthening of RC structures do not provide enough provision for the design of the column-slab connections strengthened with externally bonded reinforcement (EBR) due to the lack of research covering this area. This study is to investigate, both experimentally and analytically, the effectiveness of bonding pre-stressed carbon fibre plates to the tension surface of concrete column-slab connections in both the serviceability and ultimate limit state. The experimental programme comprises five full-scale specimens that are designed and fabricated to simulate an interior column-slab connection. The prestressing technique, application procedure and prestressing device are described in detail in this study. Different prestressing forces are applied to the FRP plates bonded to the concrete substrate. The structural response of the strengthened specimens are compared with a reference specimen in terms of punching shear strength, deflection profile, strain, crack opening displacement and failure modes. Furthermore, a finite element model using ABAQUS is built to obtain a further insight into the punching behaviour of the test slabs. Both experimental and numerical results are compared, and a parametric study on the effect of the FRP-concrete interface on the structural integrity is conducted. Results are also compared with Eurocode 2 and ACI for the prediction of the punching strength. It was found that bonding of prestressed FRP plates to the tensile face of the concrete slabs improved the serviceability, but was not able to enhance the ultimate behaviour as much as the non-prestressed FRP plates. The development of the critical diagonal crack (CDC) was the main reason for diminishing the ultimate strength of the strengthened slabs.

موضوع مستند نشده

Punching shear, prestressed FRP, debonding, critical diagonal crack ; Finite element analysis

مستند نام اشخاص تاييد نشده

Abdullah, Ahmad Mahmoud

مستند نام اشخاص تاييد نشده

Bailey, Colin ; Wu, Jack

مستند نام تنالگان تاييد نشده

University of Manchester

نام الکترونيکي

فرمت انتشار

p

نوع ماده

[Thesis]

کد کاربرگه

276903

سطح دسترسي

a

تكميل شده

Y