- 摘 要
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黃 崑 楊發(fā)云?。ㄏ愀鄞髮W(xué)土木工程系）
[提要] 對(duì)6個(gè)不同構(gòu)造方式的1：2的梁柱節(jié)點(diǎn)試件進(jìn)行反復(fù)循環(huán)荷載下試驗(yàn)研究。結(jié)果表明，與傳統(tǒng)的箍
筋相比，附加節(jié)點(diǎn)斜筋能和梁筋有限度地共同工作，從而將塑性鉸從柱面轉(zhuǎn)移。這樣改善了鋼筋的粘結(jié)狀況，避免中等延性范圍內(nèi)縱筋的屈服向節(jié)點(diǎn)核心區(qū)擴(kuò)展，地震能量被更有利的耗散機(jī)制吸收。同時(shí)，斜筋使節(jié)點(diǎn)本身的強(qiáng)度和剛度也得到進(jìn)一步加強(qiáng)。結(jié)果可供中等烈度區(qū)抗震設(shè)計(jì)時(shí)參考。
[關(guān)鍵詞] 鋼筋混凝土 梁柱節(jié)點(diǎn) 塑性鉸 斜鋼筋A new detailing of joint reinforcement, i.e. additional diagonal bars, is proposed and studied. Six half-size interior beam-column subassemblages are tested under reversed cyclic loading. Based on the test results,it is found that the additional diagonal bars can work together with the longitudinal bars and succeed in moving the plastic hinge from the column face. As a result, the bond condition is improved, and the joint core could be prevented from yielding penetration up to a moderate ductility level. The earthquake energy is thus dissipated more favorably. In addition, because of the presence of the inclined steel portion in the joint, the strength and stiffness of the joint panel are improved as well.
Keywords: reinforced concrete; beam-column joint; plastic hinge; diagonal bars參 考 文 獻(xiàn)1. Filippou F C, Popov E P, Bertero V V. Effects of bond deterioration on hysteretic behavior of reinforced concrete joint.s. Report No.UCB/EERC-83/19, Earthquake Engineering Research Center, University of California, Berkeley, California, 1983: 184.
2. NZS 3101. Part l: The design of concrete structures and part 2:Commentary on the design of concrete structures. Standards New Zealand, Wellington, 1995: 520.
3. Abdel-Fattah B, Wight J K. Study of moving beam plastic hinging zones for earthquake-resistant design of R/C builc[ings. ACI Structural Journal, Jan.-Feb. , 1987: 31-39.
4. Paulay T, Priestley M J N. Seismic design of reinforced concrete and masonry buildings. J. Wiley & Sons, New York, 1992.
5. BSI, BS 8110. Structural use of concrete, Part l. British Standards Institution, 1997.
6. Cheung P C. Seismic design of reinforced concrete beam-column joints with floor slab. Research Report, 91( 4), Department of Civil Engineering, University of Canterbury, Christchurch, 1991.
7. Popov E P. Bond and anchorage of reinforcing bars under cyclic loading. ACI Journal, 1984, 81(4).
8. Yang S S, Chen J K. Bond slip and crack width calculations of tension members. ACI Structural Journal, 1988, 85(4).
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