نتایج جستجو برای: prestressed concrete

تعداد نتایج: 76851  

2002
J. LIBRA J. MAREČEK

The paper presents design of a single-nave hall with the span of 12 m and pole height from 3.0 to 4.5 m. The hall can be used for warehousing goods, garaging vehicles or shedding farm animals. Construction material is mostly round timber. The structure consists of a strut brace frame with reinforced saddle diaphragm beam in longitudinal module 3.6 m, timber binding rafter and transversal trusse...

2013
Yuan Zhang Yibo Li Yuan Zhan

Prestressed Concrete Cylinder Pipe (PCCP) is a widely used water pipe all over the world. A major cause of PCCP failure is the internal wire break, which will emit acoustic signal. In this paper, a hydrophone-based PCCP real-time monitoring and failure-prediction system was proposed. By applying wavelet energy normalization analysis to signal feature extraction and Support Vector Machine (SVM) ...

1994
Robert L. Smith Robert J. Bush Daniel L. Schmoldt

The Analytical Hierarchy Process was used to characterize the bridge material selection decisions of highway engineers and local highway officials across the United States. State Department of Transportation engineers, private consulting engineers, and local highway officials were personally interviewed in Mississippi, Virginia, Washington, and Wisconsin to identify how various factors determin...

2014
D.Kishore Kumar

The increased speed and weight of modern trains puts the components of a railway track in a highly dynamic load situation. Irregularities of the wheels and rails induce substantial dynamic loads that have to be accounted for in the procedure of designing the railway track. The concrete sleeper is an essential part of the track structure and there is a growing demand for improved analytical tool...

2003
S. Rizkalla

The need for repair and strengthening of deteriorated, damaged and substandard infrastructures has become an important challenge worldwide. The demand for increasingly heavier truck loads is forcing bridge owners to upgrade existing structures. In response to the growing need for concrete repair and rehabilitation, an experimental program was conducted to investigate the feasibility of using di...

Journal: :Canadian Journal of Civil Engineering 2021

The rehabilitation of structures is a complex process that involves many considerations. This paper presents results feasibility study on the use precast prestressed concrete prisms (PCPs) as near-surface mounted reinforcement for cracked one-way slabs. PCPs were cast with high-strength and concentrically by one 9 mm diameter stress-relieved seven-wire steel strand. Six identical slabs length 3...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1378

در شاخه سیویل و در ساخت سازه ها همیشه ایمنی و بعد از آن هزینه مهم ترین پارامترهای مورد نظر مهندسان در طراحی بوده است . و در این میان هزینه می توانسته طرحی را مقبول کارفرمایان و توجیه پذیر از نظر اقتصادی نماید. بنابراین در صورتیکه بتوان تمام طرحهای قابل قبول از نظر سازه ای را در برابر هزینه بری های هر کدام مقایسه نمود و بهترین طرح را، انتخاب نمود ایده آل مهندسین خواهد بود. در این پایان نامه به ت...

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