本文關(guān)鍵詞： 強(qiáng)剪弱彎 實(shí)配鋼筋 極限狀態(tài)方程 可靠度 施工圖　出處：《建筑結(jié)構(gòu)》2016年S1期 　論文類型：期刊論文

【摘要】：防止框架梁剪切破壞是框架結(jié)構(gòu)抗連續(xù)倒塌設(shè)計(jì)的基本要求。研究表明,框架梁抗剪能力不足是導(dǎo)致框架結(jié)構(gòu)"強(qiáng)柱弱梁"耗能機(jī)制難以形成的重要因素之一。這就需要在設(shè)法保證框架接近形成梁鉸型塑性機(jī)構(gòu)的同時(shí),防止梁端塑性鉸區(qū)在其達(dá)到塑性變形狀態(tài)之前發(fā)生脆性剪切破壞,即通常所說(shuō)的RC框架梁"強(qiáng)剪弱彎"措施。建立框架結(jié)構(gòu)梁端實(shí)配鋼筋"強(qiáng)剪弱彎"可靠度極限狀態(tài)方程,利用一次二階矩實(shí)用分析法求解梁端可靠度。設(shè)定框架梁"強(qiáng)剪弱彎"目標(biāo)可靠度βt:一級(jí)抗震等級(jí)βt=3.1,二級(jí)抗震等級(jí)βt=2.6,三級(jí)抗震等級(jí)βt=2.1,四級(jí)抗震等級(jí)βt=1.6。根據(jù)6組不同抗震設(shè)防烈度鋼筋混凝土框架結(jié)構(gòu)實(shí)配鋼筋施工圖,求出梁端節(jié)點(diǎn)可靠度β,對(duì)不符合"強(qiáng)剪弱彎"可靠度要求的梁端,采取增大箍筋配筋面積和改變梁截面尺寸的方法,確保框架結(jié)構(gòu)梁端滿足"強(qiáng)剪弱彎"可靠度水平。
[Abstract]:Preventing shear failure of frame beam is the basic requirement of continuous collapse design of frame structure. The insufficient shear capacity of frame beam is one of the important factors that lead to the difficulty of energy dissipation mechanism of "strong column and weak beam" of frame structure, so it is necessary to make sure that the frame approach to form beam hinge plastic mechanism at the same time. The brittle shear failure is prevented in the plastic hinge region of the beam before it reaches the plastic deformation state. That is to say, the RC frame beam "strong shear weak bending" measures, the frame structure beam end with steel bar "strong shear weak bending" reliability limit state equation of state. The reliability of beam end is calculated by using the first order second order moment practical analysis method. The reliability 尾 t of the target of "strong shear and weak bending" of the frame beam is set up: the first grade of earthquake resistance is 3.1, and the second grade of earthquake resistance is 尾 _ t _ (2.6). According to six groups of reinforced concrete frame structures with different seismic fortification intensity, the reliability 尾 of beam end joints is calculated. For the end of beam which does not meet the reliability requirement of "strong shear and weak bending", the method of increasing the reinforcement area of stirrups and changing the size of beam section is adopted to ensure that the beam end of frame structure meets the reliability level of "strong shear and weak bending".
【作者單位】： 西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;
【分類號(hào)】：TU375
【正文快照】： 0引言多層和高層RC框架房屋是我國(guó)工業(yè)與民用建筑中最常用的結(jié)構(gòu)形式,由于其自身剛度小,地震作用引起的側(cè)向位移較大,采取合理的抗震構(gòu)造措施是保證RC框架結(jié)構(gòu)抗地震倒塌能力的關(guān)鍵[1]�？蚣芙Y(jié)構(gòu)應(yīng)具有必要的承載力、剛度、穩(wěn)定性、延性及合理的耗能方面的性能,主要的耗能構(gòu)件，

本文編號(hào)：1457143