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Research on the Key Technology of Trussed Combination Arch Bridge Strengthened

Author: ZhouYanJun
Tutor: MengYun
School: Chongqing Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Truss Arch Bridge Diseases and defects Reinforcement of key technologies Carrying capacity Modal Analysis
CLC: U445.72
Type: Master's thesis
Year: 2010
Downloads: 53
Quote: 2
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Abstract


Truss Arch Bridge as China's first in the eighties of last century a new type of bridge type , has been vigorously promoting its light and beautiful across ability , save labor and material , simple in construction and other prominent advantages , in the past 20 years , and achieved good results. However, after 20 years of development and use , this bridge type gradually revealed many shortcomings , the disease is becoming more serious . Truss Arch Bridge , also not very significant results . Therefore , seek Truss Arch Bridge Retrofitting of the key technologies is of great practical significance . First , the authors collected the existing Truss Arch Bridge research data identify the major diseases of Truss Arch Bridge . Depending on the design and construction drawings , bridges Dr. plane finite element analysis software , the establishment of the Franco-German Bridge plane finite element model to simulate the construction process , and dead load , live load and load combination under static analysis obtained Truss arch Bridges and defects are the main causes of the bridge -type system inherent in birth defects, excessive pursuit of technical indicators of the economy , resulting in the structure of local component strength can not meet the design requirements , the safety margin is low , less durable structure . Then Truss Arch Bridge status quo analysis and summary , reinforcement of key technology research Truss Arch Bridge . The key technology is derived reinforcement Truss Arch Bridge to be resolved : start from changing the structural system , increase the bottom chords of roof , so that the real abdominal segment to return to the traditional arch bridge ; \enhanced structural integrity . Finally, application examples to the Franco-German Bridge reinforcement , reinforcement is established Franco-German Bridge plane and space finite element model , and the static and dynamic performance analysis , reinforcement of key technologies to Truss Arch Bridge practical illustration may be out : Franco - German bridge reinforced to meet the road - II class strength requirements , and secure greater reserves ; natural frequencies larger than before reinforcement , full-bridge stiffness increased dynamic performance improved significantly reinforced .

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge Construction > Bridge maintenance, repair and remediation > Bridge strengthening
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