New Developments in Cable-Stayed Bridge Design, San Francisco

2003 ◽  
Vol 13 (1) ◽  
pp. 59-63 ◽  
Author(s):  
David Goodyear ◽  
John Sun
Author(s):  
Chet Chie Voon ◽  
Hiang Miang Goh ◽  
Chuan Seng Koo

<p>The construction of the Pulau Poh cable-stayed bridge has been challenging both technically and environmentally. The curved pylon shape in two planes, with changing cross section and heavily congested reinforcement pose constructability concerns. Accurate geometry control and positioning of stay cable anchorages within the pylon is crucial to ensure the bridge meets its intended design life. Located in an area with high rainfall intensity presents additional environmental challenges, where working areas are constantly submerged. To address the challenges and meet the project deadline, innovative construction methodologies are being adopted. The bridge design was also revisited, taking into consideration the construction approach. This paper aims to explain the challenges faced and methods used to fast track the construction of the Pulau Poh cable-stayed bridge.</p>


2016 ◽  
Vol 21 (7) ◽  
pp. 04016028 ◽  
Author(s):  
Q. Wen ◽  
X. G. Hua ◽  
Z. Q. Chen ◽  
Y. Yang ◽  
H. W. Niu

2008 ◽  
Vol 17 (3) ◽  
pp. 470-471
Author(s):  
Qiang Zhang ◽  
Baofeng Gao ◽  
Chengyu Liu ◽  
Mujie Liao

2011 ◽  
Vol 90-93 ◽  
pp. 1061-1068
Author(s):  
Ai Jun Chen ◽  
Guo Jing He

Harp shaped cable-stayed bridges without backstays are popular due to their beautiful and unique styles; they employ leaning tower columns to balance the constant and movable loads on the decks and are not provided with backstays, so they are beyond the traditional bridge design philosophy. In this paper, we discussed the reasonable structure of the main girder of Changsha Hongshan Bridge – a harp shaped cable-stayed bridge without backstays through changing the design parameters of the main girder in respect of design so as to provide important reference for design of this kind of bridges, and the research mainly related to such aspects as the structure selection for and section design of the main girder, the influence of overweight of main girder on the force on the structure, the length of non-cable area of the main girder, the span of auxiliary hole, etc.


Coming Home ◽  
2019 ◽  
pp. 64-94
Author(s):  
Wendy Kline

Chapter 3, “Psychedelic Birth: The Emergence of the Hippie Midwife,” explores the home birth experience from the perspective of the counterculture. In this context, childbirth became a catalyst to spiritual transcendence. At the same time, new developments in psychiatric research and the proliferation of psychoactive substances created a vibrant, albeit surprising, intellectual exchange between hippies, midwives, and some psychiatrists about the meaning and significance of birth. This chapter exposes the resulting unexpected entanglements between psychedelic psychiatry and spiritual midwifery by focusing on the creation of the longest lasting hippie commune, The Farm. Though The Farm was established in Summertown, Tennessee, its founders traveled from San Francisco to build their utopia and they brought with them intellectual and practical tools gathered from as far away as Communist China and Czechoslovakia. The story illustrates how alternative pathways to mainstream medicine, in both childbirth and psychiatry, came into fruition in the 1970s.


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