本文選題：綠色高性能纖維增強(qiáng)水泥基復(fù)合材料　切入點(diǎn)：框架梁柱節(jié)點(diǎn)　出處：《山東建筑大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：綠色高性能纖維增強(qiáng)水泥基復(fù)合材料(Green High Performance Fiber Reinforced Cementitious Composites,GHPFRCC)是以水泥、水、高摻量粉煤灰、石英砂、聚乙烯醇纖維(Polyvinyl Alcohol Fiber,PVA纖維)及高效減水劑等原料制備而成。常溫下GHPFRCC具有出色的多縫開裂性能和應(yīng)變硬化的能力,GHPFRCC新型框架梁柱節(jié)點(diǎn)具有優(yōu)異的抗震性能和耗能能力。但是在高溫下,由于PVA纖維的熔化導(dǎo)致GHPFRCC力學(xué)性能出現(xiàn)劣化,因此GHPFRCC框架節(jié)點(diǎn)的抗火性能亟待研究探明。本文以GHPFRCC框架節(jié)點(diǎn)為研究對(duì)象,通過(guò)耐火試驗(yàn)研究了節(jié)點(diǎn)澆筑形式及配箍率等因素對(duì)GHPFRCC框架節(jié)點(diǎn)抗火性能的影響,主要內(nèi)容包括以下兩部分:第一部分主要是介紹GHPFRCC框架節(jié)點(diǎn)耐火試驗(yàn)。按照“強(qiáng)柱弱梁,強(qiáng)剪弱彎”的基本原則使用最佳配合比的GHPFRCC和C30混凝土兩種材料制作5個(gè)相同尺寸的框架節(jié)點(diǎn),進(jìn)行高溫-恒載耦合作用下的耐火試驗(yàn)準(zhǔn)備工作;主要研究不同澆筑材料、澆筑形式、核心區(qū)有無(wú)配箍等因素對(duì)節(jié)點(diǎn)耐火性能的影響。第二部分主要是分析討論了GHPFRCC框架節(jié)點(diǎn)抗火性能的影響因素及規(guī)律。對(duì)高溫下及高溫后各框架節(jié)點(diǎn)的耐火極限、爆裂現(xiàn)象、梁柱端位移及梁端破壞現(xiàn)象等進(jìn)行了分析討論。試驗(yàn)結(jié)果表明,(1)雖然高溫下GHPFRCC的熱穩(wěn)定性不佳,且GHPFRCC澆筑的框架節(jié)點(diǎn)爆裂現(xiàn)象比混凝土框架節(jié)點(diǎn)嚴(yán)重,但GHPFRCC框架節(jié)點(diǎn)的耐火極限大于混凝土框架節(jié)點(diǎn);(2)使用GHPFRCC及C30混凝土混合澆筑的框架梁柱節(jié)點(diǎn)在高溫作用下耐火極限最長(zhǎng)、試件破壞最小,表現(xiàn)出優(yōu)異的耐火性能;(3)已有研究表明常溫下僅在節(jié)點(diǎn)核心區(qū)澆筑GHPFRCC可以減少甚至替代核心區(qū)箍筋的配置,但本文研究結(jié)果表明在高溫下核心區(qū)配置箍筋的必要性,核心區(qū)未配置箍筋的GHPFRCC框架節(jié)點(diǎn)在高溫作用下框架梁發(fā)生明顯的剪切破壞,節(jié)點(diǎn)核心區(qū)GHPFRCC發(fā)生隆起,框架節(jié)點(diǎn)耐火極限最短,破壞最突然。
[Abstract]:Green High Performance Fiber Reinforced Cementitious compositions (GHPFRCCC) is made of cement, water, fly ash and quartz sand. Poly vinyl Alcohol fiber and high performance water reducer were prepared from polyvinyl alcohol fiber. At room temperature, GHPFRCC has excellent multi-joint cracking and strain hardening ability. GHPFRCC new type frame Liang Zhu joint has excellent seismic performance and energy dissipation. But at high temperatures, Because the melting of PVA fiber leads to the deterioration of GHPFRCC mechanical properties, it is urgent to study the fire resistance of GHPFRCC frame joints. In this paper, the GHPFRCC frame joints are taken as the research object. The effect of joint pouring and hoop ratio on the fire resistance of GHPFRCC frame joints is studied by means of fire resistance test. The main contents include the following two parts: the first part mainly introduces the fire resistance test of GHPFRCC frame joints. The basic principle of "strong shear and weak bending" is to make five frame joints of the same size from GHPFRCC and C30 concrete with the best mix ratio, and to prepare for the fire resistance test under the coupling action of high temperature and dead load. In the second part, the influence factors and rules of the fire resistance of GHPFRCC frame joints are analyzed, and the fire resistance limits of each frame joint at high temperature and after high temperature are discussed. The phenomena of burst, displacement of Liang Zhu end and failure of beam end are analyzed and discussed. The experimental results show that although the thermal stability of GHPFRCC is not good at high temperature, and the crack phenomenon of GHPFRCC cast frame joints is more serious than that of concrete frame joints, However, the fire resistance limit of GHPFRCC frame joints is greater than that of concrete frame joints. It has been shown that GHPFRCC can reduce or even replace the stirrups in the core area of the node at room temperature, but the research results show that it is necessary to deploy stirrups in the core area at high temperature. The GHPFRCC frame joints with no stirrups in the core region have obvious shear failure under the high temperature, the GHPFRCC in the core region of the joints is raised, the fire resistance limit of the frame joints is the shortest, and the damage is the most sudden.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB332

【相似文獻(xiàn)】

相關(guān)期刊論文 前5條

1 李俊杰;;化學(xué)工業(yè)廠房的鋼筋混凝土框架節(jié)點(diǎn)的抗震設(shè)計(jì)探析[J];天津化工;2013年05期

2 吳進(jìn);化工廠房鋼筋混凝土框架節(jié)點(diǎn)抗震設(shè)計(jì)[J];石化技術(shù)與應(yīng)用;1999年03期

3 許蘭生;化工廠房鋼筋混凝土框架節(jié)點(diǎn)抗震設(shè)計(jì)[J];石油化工建設(shè);2005年04期

4 胡名凱,金海軍;不同等級(jí)混凝土的框架節(jié)點(diǎn)施工[J];西部探礦工程;2001年S1期

5 王步;王溥;夏春紅;;碳纖維布增強(qiáng)混凝土平面框架節(jié)點(diǎn)抗剪性能試驗(yàn)研究與機(jī)理分析[J];世界地震工程;2006年01期

相關(guān)會(huì)議論文 前10條

1 季韜;鄭作樵;鄢飛;;關(guān)于框架節(jié)點(diǎn)中一些問(wèn)題的討論[A];第十屆全國(guó)結(jié)構(gòu)工程學(xué)術(shù)會(huì)議論文集第Ⅱ卷[C];2001年

2 曹霞;金凌志;胡錦秀;;預(yù)應(yīng)力框架節(jié)點(diǎn)設(shè)計(jì)探討[A];第14屆全國(guó)結(jié)構(gòu)工程學(xué)術(shù)會(huì)議論文集（第二冊(cè)）[C];2005年

3 唐波;余江滔;丁斌;;鋼筋混凝土框架節(jié)點(diǎn)震損加固方法的對(duì)比研究[A];第八屆全國(guó)地震工程學(xué)術(shù)會(huì)議論文集（Ⅱ）[C];2010年

4 王正霖;李唐寧;秦士洪;鄧朝榮;;豎向預(yù)應(yīng)力框架節(jié)點(diǎn)的試驗(yàn)分析[A];第九屆全國(guó)混凝土及預(yù)應(yīng)力混凝土學(xué)術(shù)交流會(huì)論文集[C];1996年

5 朱春明;王溥;陳敬安;;高強(qiáng)混凝土框架節(jié)點(diǎn)的抗剪強(qiáng)度[A];混凝土結(jié)構(gòu)基本理論及應(yīng)用第二屆學(xué)術(shù)討論會(huì)論文集（第二卷）[C];1990年

6 馮瀏R，

本文編號(hào)：1645451