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post tensioned beam & bonded steel
is the bottom bar of the bonded beam steel of post-tensioned beams required to be hooked at column end support? in most pti details i've seen, they show bottom & top bars to be hooked but i would like to eliminate some congestion.
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i'm not certain here...so do some research, but i think the bottom steel needs to be detailed in accorcance with the structural integrity sections of chapter 7 of the aci 318 code. also, if you use your beams in a lateral resisting frame, you may have conditions with bottom steel in tension at the supports, where you'd need to develop them properly - just like negative top steel would need to be.
according to the pci handbook, there are some alternatives for anchorage at the support. such as positively attaching(welding) bars to anchorage plates or transverse anchorage bars. the other alternatives shown do not seem to alleviate congestion. the purpose of these details is for end bearing. they outline some potential failure planes that certain amounts of steel should cross. i'm citing a fifth edition pci. top steel i'm not sure about, and pci does not address.

2009-09-15, 01:42 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	post tensioned beam bonded steel post tensioned beam & bonded steel is the bottom bar of the bonded beam steel of post-tensioned beams required to be hooked at column end support? in most pti details i've seen, they show bottom & top bars to be hooked but i would like to eliminate some congestion. find a job or post a job opening i'm not certain here...so do some research, but i think the bottom steel needs to be detailed in accorcance with the structural integrity sections of chapter 7 of the aci 318 code. also, if you use your beams in a lateral resisting frame, you may have conditions with bottom steel in tension at the supports, where you'd need to develop them properly - just like negative top steel would need to be. according to the pci handbook, there are some alternatives for anchorage at the support. such as positively attaching(welding) bars to anchorage plates or transverse anchorage bars. the other alternatives shown do not seem to alleviate congestion. the purpose of these details is for end bearing. they outline some potential failure planes that certain amounts of steel should cross. i'm citing a fifth edition pci. top steel i'm not sure about, and pci does not address. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]