Fatigue behavior of post-installed shear connectors used to strengthen continuous non-composite steel bridge girders
/ Amir Reza Ghiami Azad
Fatigue behavior of post-installed shear connectors used to strengthen continuous non-composite steel bridge girders
المؤلف
/ Amir Reza Ghiami Azadطبع 1
قائمة
شناسنامه
المدخل الرئيسي
Ghiami, Amir Reza، نویسندهالعنوان واسم المؤلف
Fatigue behavior of post-installed shear connectors used to strengthen continuous non-composite steel bridge girders / / Amir Reza Ghiami Azadبيانات النشر
آستین، تگزاس : : [University of Texas]، 2016مالمواصفات الشكلية
xxxi, 330 leaves؛ ; 30 cm؛ : ill..الموضوع
MetalsFatigue
Iron and steel bridges
Maintenance and repair
اللغة
انگلیسیرقم الاسترجاع
المؤتمر:
ملاحظات
انگليسي.Ph.D. dissertation presented to faculty of the Graguate School of the University of Texas at Austin, 2016.
Summary: Many older bridges in Texas are constructed with floor systems consisting of a concrete slab over steel girders. A potentially economical means of strengthening these floor systems is to connect the existing concrete slab and steel girders using post-installed shear connectors to change the behavior of the beam from non-composite to partially-composite. Since fatigue is one of the main concerns in designing bridges, investigating the fatigue properties of these post-installed shear connectors becomes crucial. Results from direct-shear testing show that post-installed shear connectors have a better fatigue life compared to conventional welded shear studs. However, based on currently available data from direct-shear tests, fatigue life of post-installed shear connectors is still inadequate for economical retrofit in some cases. Furthermore, it is unclear if direct-shear tests provide an appropriate means of evaluating fatigue performance. The objective of this dissertation is to develop new and more accurate approaches for evaluating the fatigue characteristics of post-installed shear connectors. This objective is addressed through large-scale beam fatigue tests and computational studies. The focus of the work is on evaluating fatigue life of shear connectors based on both slip and stress demands..
Includes bibliographical references(p.324-329).
