In order to explore the “strong column weak beam” seismic design principles of reinforced concrete frames, two lattice system columns with V-braces and X-braces and a test specimen without brace were designed for cyclic tests. Based on the test results, the cracking load, ultimate bearing capacity and failure modes were obtained. Hysteretic curves, skeleton curves, deformation and ductility coefficient ability of seismic performance of the latticed system columns with RC braces were analyzed and compared with the specimens without braces. Experimental results indicate that good seismic performance can be obtained for the Latticed System Columns with RC braces, and its resistant lateral stiffness increases obviously. For lattice system columns with RC braces the plastic hinges of braces and beams unusually appears in advance, which makes the structure easy to realize the target of seismic design of “strong column weak beam”,however, the lattice system columns without the RC braces do not show such trend.
為探索實現(xiàn)鋼筋混凝土框架中的“強柱弱梁”的抗震設(shè)計原則,該文設(shè)計兩個 支撐形式分別為人字形、交叉形的格構(gòu)化體系柱和一個無支撐的格構(gòu)化體系柱試件,并 對其進(jìn)行低周期反復(fù)荷載試驗。得出格構(gòu)化體系柱的開裂荷載、極限承載力和破壞形態(tài), 分析帶RC支撐的格構(gòu)化體系柱的滯回曲線、骨架曲線、變形能力、延性等抗震性能, 并和無支撐的格構(gòu)化體系柱進(jìn)行對比分析。分析結(jié)果表明:帶RC支撐的格構(gòu)化體系柱 的極限承載力、抗側(cè)剛度等抗震性能較無支撐格構(gòu)化體系柱有明顯的提高。在帶RC支 撐的格構(gòu)化體系柱中,支撐和梁往往先于柱子出現(xiàn)塑性鉸,使結(jié)構(gòu)容易實現(xiàn)“強柱弱梁” 的抗震設(shè)計目標(biāo),而不帶RC支撐的格構(gòu)化體系柱卻很難實現(xiàn)。