Temperature Control and Numerical Analysis for Mass Concrete Pile Cap of Hai-huang Bridge

Bridges are construction structures that are built to connect parts of the road that are cut off by obstacles such as deep valleys, irrigation channel paths. In order to build a bridge, a strong, economical and easy to build foundation is needed to carry gravity loads and also earthquake force. A common problem encountered in bridge foundation is the occurrence of erosion around the piles due to scouring of water which causes exposing some portion of the piles, which are often referred as elevated reinforced concrete pile-cap foundations. In this study, a numerical analysis of pile groups on elevated reinforced concrete pile-cap foundations is carried out with lateral forces on sandy soil to see the ductility behavior of piles using geotechnical-based programs and to compare the results with the previous studies. The analysis includes the pilecap model and the soil-to-pile interaction and also considers the pile group effect. The analysis was carried out to see the structural and geotechnical conditions on the ductility behavior of a partially embedded piles on sandy soil. The result obtained is a comparison of the ductility and overstrength values that can be used as a consideration in designing elevated reinforced concrete pile-cap foundations.Keywords: Elevated RC pile-cap foundations; numerical analysis; lateral force; ductility AbstrakJembatan adalah struktur konstruksi yang dibangun untuk menghubungkan bagian jalan yang terputus oleh rintangan-rintangan seperti lembah yang dalam, alur saluran irigasi. Untuk membangun sebuah jembatan, diperlukan fondasi yang kuat, ekonomis dan mudah untuk dibangun untuk memikul beban dari jembatan dan juga gaya gempa. Masalah yang umum ditemui pada konstruksi fondasi jembatan adalah terjadinya erosi pada sekitar fondasi dikarenakan gerusan air yang menyebabkan tanah terangkat dan memperlihatkan sebagian tiang fondasi, yang sering disebut dengan elevated reinforced concrete pile-cap foundations. Pada penelitian ini dilakukan analisis secara numerik terhadap kelompok tiang pada elevated reinforced concrete pile-cap foundations yang dibebani gaya lateral pada tanah berpasir untuk melihat perilaku daktilitas tiang dengan bantuan program berbasis geoteknik dan membandingkan dengan hasil penelitian terdahulu. Analisis menyertakan model kepala tiang dan hubungan antara tanah dengan tiang serta mempertimbangkan efek kelompok tiang. Analisis dilakukan untuk melihat kondisi struktural dan geoteknikal pada perilaku daktilitas fondasi yang ditanam sebagian pada tanah pasir. Hasil yang didapatkan adalah perbandingan nilai daktilitas dan overstrength yang dapat digunakan sebagai pertimbangan dalam mendesain elevated reinforced concrete pile-cap foundations.

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The temperature control of massive concrete pile cap

Mechanical, Information and Industrial Engineering ◽

10.2495/icmiie140541 ◽

2015 ◽

Author(s):

Jiang Yue Nan ◽

Wei Ding

Keyword(s):

Temperature Control ◽

Massive Concrete ◽

Concrete Pile ◽

Pile Cap

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Temperature Control Technique and Analysis of Mass Concrete in the Pile Cap of Main Pier in Yangtze River Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.587-589.1407 ◽

2014 ◽

Vol 587-589 ◽

pp. 1407-1411 ◽

Cited By ~ 1

Author(s):

Jun Su ◽

Guo Wang Zuo ◽

Wei Li

Keyword(s):

Finite Element ◽

Temperature Field ◽

Temperature Control ◽

Yangtze River ◽

Cooling Water ◽

Control Technique ◽

Mass Concrete ◽

Element Analysis ◽

Pile Cap ◽

Calculation Results

The paper analyzed the temperature control technique measures of mass concrete in the pile cap of main pier in Yangtze River Bridge. Consider the effect of the cooling pipe, ANSYS finite element analytical software was used to calculate the temperature field of the pile cap in the construction, the distribution rules of the temperature field was simulated by finite element analysis. It is shown that the cooling effect of the mass concrete is obvious by using cooling water pipe, the finite element calculation results can be used to lead to the design and construction. It also provides the reference to develop a reasonable temperature control solutions during the construction of the similar mass concrete.

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Comparative Study of Model Test and Numerical Analysis on the Temperature Monitoring of Mass Concrete Raft Foundation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.351-352.1231 ◽

2013 ◽

Vol 351-352 ◽

pp. 1231-1235

Author(s):

Wei Sun ◽

Qiang Wang ◽

Chao Ge

Keyword(s):

Numerical Analysis ◽

Comparative Study ◽

Temperature Control ◽

Model Test ◽

Temperature Monitoring ◽

Control Measures ◽

Mass Concrete ◽

High Rise ◽

Raft Foundation ◽

Mat Foundation

A high-rise building with an 11 meters thick raft foundation will be built in Shenyang, which will bring a huge challenge to construction on site. To avoid temperature crack affecting construction quality, a comparative study of model test and numerical analysis about temperature monitoring are carried out to determine the construction measures for the mass concrete mat foundation. The results show that the development of temperature field of inner concrete can be divided into three stages: growing rapidly, cooling fast and cooling steadily. Different temperature control measures should be used for different temperature developing stages. The results of the model test and numerical analysis in the paper will provide technical supports to the temperature control on site.

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Study on Temperature Field and Construction Monitoring of Hydration Heat of Railway Cable-Stayed Bridge Pile Cap

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.1589 ◽

2011 ◽

Vol 243-249 ◽

pp. 1589-1596

Author(s):

Xu Hui He ◽

Hao Cheng ◽

Hong Xi Qin

Keyword(s):

Temperature Field ◽

Thermal Stress ◽

Temperature Control ◽

Structural Reliability ◽

Control Measure ◽

Time History ◽

Hydration Heat ◽

Control Measures ◽

Mass Concrete ◽

Pile Cap

The temperature control of mass concrete is regarded to be a universal problem. Because of the heavy load of railway cable-stayed bridges, the pile caps usually have large dimensions, so the thermal stress, which is caused by hydration heat, must be emphasized. In order to study the spatial distribution of temperature in mass concrete and find a functional temperature control measure during construction, the theoretical and FEM analysis of hydration heat-thermal stress field are applied, which can improve structural reliability and provide reference for design and engineering of the similar project. Based on FEM calculation, the theoretical hydration heat temperature field is obtained. In the same time, the temperature sensors as well as strain sensors are arranged in the key position of pile cap. Then the variation of hydration temperature in concrete would be measured and recorded since the concrete is pouring. According to the theoretical simulation and the monitoring results, the time-history curve of hydration heat is obtained, and the variation of inner temperature gradient along the height direction as well as the longitudinal direction with the concrete age are studied, and the feasibility of temperature control measures is also verified.

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Concrete Filled Steel Tube Piles to Concrete Pile-Cap Connections

Structures Congress 2012 ◽

10.1061/9780784412367.052 ◽

2012 ◽

Cited By ~ 1

Author(s):

L. Kappes ◽

M. Berry ◽

J. Stephens ◽

L. McKittrick

Keyword(s):

Steel Tube ◽

Concrete Filled Steel Tube ◽

Concrete Pile ◽

Pile Cap

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Temperature Control and Anti-Cracking Measures for a High-Performance Concrete Aqueduct

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.405-408.2739 ◽

2013 ◽

Vol 405-408 ◽

pp. 2739-2742 ◽

Cited By ~ 1

Author(s):

Zhen Hong Wang ◽

Shu Ping Yu ◽

Yi Liu

Keyword(s):

Temperature Control ◽

Temperature Difference ◽

High Performance ◽

High Performance Concrete ◽

Concrete Structures ◽

Apparent Temperature ◽

Mass Concrete ◽

Water Pipe ◽

Thin Walled ◽

Water Pipe Cooling

To solve the problem of cracks developing on thin-walled concrete structures during construction, the authors expound on the causes of cracks and the crack mechanism. The difference between external and internal temperatures, basic temperature difference and constraints are the main reasons of crack development on thin-walled concrete structures. Measures such as optimizing concrete mixing ratio, improving construction technology, and reducing temperature difference can prevent thin-walled concrete structures from cracking. Moreover, water-pipe cooling technology commonly used in mass concrete can be applied to thin-walled concrete structures to reduce temperature difference. This method is undoubtedly a breakthrough in anti-cracking technology for thin-walled concrete structures, particularly for thin-walled high-performance concrete structures. In addition, a three-dimensional finite element method is adopted to simulate the calculation of temperature control and anti-cracking effects f. Results show the apparent temperature controlling effect of water-pipe cooling for thin-walled concrete structures.

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