Experimental Study on Failure Mechanism of RC Frame Structures Based on Performance Design Method

doi:10.12141/j.issn.1000-565X.230648

Abstract

Abstract:

To verify the rationality, reliability and fault tolerance of the “two-level and two-stage” seismic performance-based design method of Guangdong standard DBJ/T 15-92—2021 “Technical specification for concrete structures of high-rise buildings”, this study designed two batches of 1∶4 scale plane RC frame structure specimens with the same seismic structure grade of first-level, second-level and third-level. During loading, iron counterweights were arranged on each floor to simulate the distributed load, and the influence of floor and floor load on the failure mechanism of frame structure was considered. The test adopted displacement-controlled single-point loading. The loading point is located at the elevation of the three-story floor beam. Before the longitudinal reinforcement of the column reaches the yield strain, it is single-cycle loading, and after the yield, it is three-cycle loading. Through the pseudo-static test, the seismic failure mode and failure mechanism of the structure were investigated, and the evolution law of seismic performance indexes such as hysteresis curves, ductility, stiffness and energy dissipation was analyzed. The test results show that the plastic hinge development paths of the specimen damage are basically the same, which conforms to the failure mechanism of the plastic hinge ductility mechanism at the beam end. The specimen has no obvious shear failure characteristics, and the bearing capacity utilization coefficient ξ can meet the seismic design requirements of “strong shear and weak bending”. The hysteresis curves of the six frame structure specimens are full, and the seismic ductility coefficient ranges from 4.36 to 6.10. The maximum value range of equivalent viscous damping coefficient is 0.125~0.165, which shows good seismic energy dissipation performance. The floor slab improves the stiffness and bearing capacity of the frame beam, which has a significant impact on the seismic failure mechanism of the specimen. The specimen maintains the seismic failure characteristics of “strong column and weak beam”, and the component importance coefficient η can ensure the seismic design requirements of “strong column and weak beam”. The failure characteristics of the specimens are random, but the overall regularity of the failure mechanism is strong, and the gradient characteristics of the specimens with different seismic structural grades are obvious.

Key words: structural frame, seismic design, failure mechanism, pseudo-static test

CLC Number:

TU375.4

LING Yuhong, HUANG Qianyi, ZHOU Jing, et al. Experimental Study on Failure Mechanism of RC Frame Structures Based on Performance Design Method[J]. Journal of South China University of Technology(Natural Science Edition), 2024, 52(11): 9-20.

Figures/Tables 17

Table 1

Fig.1

Table 2

Table 3

Table 4

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Table 5

Table 6

Bearing capacity and deformation capacity of the specimen"

编号	加载方向	屈服荷载点		峰值荷载点			破坏荷载点		延性系数	均值
编号	加载方向	$P y$ /kN	$Δ y$ /mm	$P u$ /kN	均值/kN	$Δ u$ /mm	$P m$ /kN	$Δ m$ /mm	延性系数	均值
KJ1-1	正向	62.23	25.32	74.60	68.52	49.30	63.41	119.71	4.73	5.19
KJ1-1	负向	-52.30	-21.20	-62.43	68.52	-48.33	-53.07	-119.78	5.65	5.19
KJ1-2	正向	48.72	19.58	57.45	54.81	47.23	48.83	112.52	5.75	5.93
KJ1-2	负向	-43.86	-19.61	-52.16	54.81	-47.43	-44.34	-119.71	6.10	5.93
KJ1-3	正向	61.19	27.11	72.57	68.22	64.97	61.68	118.21	4.36	4.43
KJ1-3	负向	-53.54	-24.60	-63.87	68.22	-47.44	-54.29	-110.45	4.49	4.43
KJ2-1	正向	60.33	23.60	71.88	66.79	46.01	61.10	114.61	4.86	4.84
KJ2-1	负向	-52.13	-22.10	-61.70	66.79	-42.73	-52.45	-106.34	4.81	4.84
KJ2-2	正向	58.22	21.60	69.08	67.41	44.16	58.72	112.85	5.22	4.83
KJ2-2	负向	-55.59	-24.18	-65.74	67.41	-46.73	-55.88	-107.03	4.43	4.83
KJ2-3	正向	52.17	19.87	60.82	59.07	92.52	51.70	116.74	5.88	5.67
KJ2-3	负向	-48.36	-20.81	-57.32	59.07	-44.79	-48.72	-113.49	5.45	5.67

Table 6

Fig.9

Fig.10

Fig.11

References 19

1	高层建筑混凝土结构技术规程：［S］．
2	建筑抗震设计规范：［S］．
3	方小丹．DBJ/T 15-92—2021《高层建筑混凝土结构技术规程》的修订依据及相关问题说明［J］．建筑结构学报，2021，42（9）：172-188.
	FANG Xiaodan ．Basis and background of revision of DBJ/T 15-92—2021 “Technical specification for concrete structures of tall buildings”［J］．Journal of Building Structures，2021，42（9）：172-188.
4	叶列平，方鄂华．关于建筑结构地震作用计算方法的讨论［J］．建筑结构，2009，39（2）：1-7.
	YE Lieping， FANG Ehua ．Discussion on calculation method of earthquake force for building structures［J］．Buidling Structure，2009，39（2）：1-7.
5	张宇，李宏男，李钢．既有钢筋混凝土结构抗震设防目标与性能评估［J］．建筑结构学报，2013，34（7）：29-39.
	ZHANG Yu， LI Hongnan， LI Gang ．Seismic performance objectives and evalution of existing reinforced concrete structures［J］．Journal of Building Structures，2013，34（7）：29-39.
6	门进杰，史庆轩，周琦．框架结构基于性能的抗震设防目标和性能指标的量化［J］．土木工程学报，2008，41（9）：76-82.
	Jinjie MEN， SHI Qingxuan， ZHOU Qi ．Performance-based seismic fortification criterion and quantified performance index for reinforced concrete frame structures［J］．China Civil Engineering Journal，2008，41（9）：76-82.
7	袁健，易伟建．钢筋混凝土梁受剪承载力可靠度分析［J］．建筑结构学报，2017，38（4）：109-128.
	YUAN Jian， YI Weijian ．Reliability analysis of shear capacity of reinforced concrete beams［J］．Journal of Building Structures，2017，38（4）：109-128.
8	韩小雷，王雨，张一璐，等．RC剪力墙结构小震与中震设计对比及其抗震性能研究［J］．地震工程与工程振动，2021，41（1）：9-15.
	HAN Xiaolei， WANG Yu， ZHANG Yilu，et al ．Comparative study on seismic design under frequent earthquake and moderate earthquake and seismic performance of RC shear wall structures［J］．Earth Quake Engineering and Engineering Dynamics，2021，41（1）：9-15.
9	汪小林，顾祥林，印小晶，等．现浇楼板对钢筋混凝土框架结构倒塌模式的影响［J］．建筑结构学报，2013，34（4）：23-31，42.
	WANG Xiaolin， GU Xianglin， YIN Xiaojing，et al ．Effect of cast-in-situ floor slab on collapse modes of RC frame structures under earthquake［J］．Journal of Building Structures，2013，34（4）：23-31，42.
10	WANG Y， ZHANG B， GU X L，et al ．Experimental and numerical investigation on progressive collapse resistance of RC frame structures considering transverse beam and slab effects［J］．Journal of Building Engineering，2022，47：103908/1-20.
11	周颖，吕西林．建筑结构振动台模型试验方法与技术［M］．2版．北京：科学出版社，2016.
12	建筑抗震试验规程：［S］．
13	SHA H， CHONG X， XIE L，et al ．Seismic performance of precast concrete frame with energy dissipative cladding panel system：half-scale test and numerical analysis［J］．Soil Dynamics and Earthquake Engineering，2023，165：107712/1-13.
14	WANG W， MA J， WANG X ．Seismic behavior of a precast RC frame-shear wall structure using full/half grout sleeve connections［J］．Engineering Structures，2023，280：115685/1-22.
15	徐云扉，胡庆昌，陈玉峰，等．低周反复荷载下两跨三层钢筋混凝土框架受力性能的试验研究［J］．建筑结构学报，1986，2（1）：1-16.
	XU Yunfei， HU Qingchang， Chen Yufeng，et al ．The experimental study of the behavior of a two-bay three-story R. C. frame under cyclic loading［J］．Journal of Building Structures，1986，2（1）：1-16.
16	冯鹏，强翰霖，叶列平．材料、构件、结构的“屈服点”定义与讨论［J］．工程力学，2017，34（3）：36-46.
	FENG Peng， QIANG Han-lin， YE Lie-ping ．Discussion and definition on yield points of materials，members and strucures［J］．Engineering Mechanics，2017，34（3）：36-46.
17	陈圣刚，高峰，耿娇，等．预应力型钢混凝土双坡框架抗震性能试验研究［J］．建筑结构学报，2023， 44（2）：100-108.
	CHEN Shenggang， GAO Feng， GENG Jiao，et al ．Experimental study on seismic behavior of prestressed steel reinforced concrete frame with double-pitches［J］．Journal of Building Structures，2023，44（2）：100-108.
18	叶列平，曲哲，马千里，等．从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现［J］．建筑结构，2008，38（11）：52-59，67.
	YE Lieping， QU Zhe， MA Qianli，et al ．Study on ensuring the strong column-weak beam mechanism for RC frames based on the damage analysis in the Wenchuan earthquake［J］．Building Structure，2008，38（11）：52-59，67.
19	薛伟辰，程斌，李杰．双层双跨高性能混凝土框架抗震性能研究［J］．土木工程学报，2004，37（3）：58-65.
	XUE Weichen， CHENG Bin， LI Jie ．Studies on seismic performance of double-story and double-span HPC frames［J］．China Civil Engineering Journal，2004，37（3）：58-65.

试件编号	1—1		2—2		3—3		箍筋（加密区/非加密区）
试件编号	截面上部	截面下部	截面上部	截面下部	截面上部	截面下部	箍筋（加密区/非加密区）
KJ1-1	3ϕ8	2ϕ8	2ϕ8	2ϕ8	2ϕ8+2ϕ6	2ϕ8	ϕ6@110/220（2）
KJ1-2	3ϕ8	2ϕ8	2ϕ8	2ϕ8	2ϕ8+2ϕ6	2ϕ8	ϕ6@170/340（2）
KJ1-3	3ϕ8	2ϕ8	2ϕ8	2ϕ8	2ϕ8+2ϕ6	2ϕ8	ϕ6@220/450（2）
KJ2-1	2ϕ8+1ϕ6	1ϕ8+1ϕ6	2ϕ8	1ϕ8+1ϕ6	3ϕ8	1ϕ8+1ϕ6	ϕ6@150/233（2）
KJ2-2	2ϕ8+1ϕ6	1ϕ8+1ϕ6	2ϕ8	1ϕ8+1ϕ6	3ϕ8	1ϕ8+1ϕ6	ϕ6@150/233（2）
KJ2-3	2ϕ8+1ϕ6	1ϕ8+1ϕ6	2ϕ8	1ϕ8+1ϕ6	3ϕ8	1ϕ8+1ϕ6	ϕ6@220/420（2）

直径/mm	屈服强度/MPa		极限强度/MPa		弹性模量/10⁵ MPa
直径/mm	一批	二批	一批	二批	一批	二批
4	222	237	290	290	2.20	1.75
6	346	314	493	422	2.26	2.27
8	340	289	510	433	2.11	2.10

特征点	楼层	KJ1-1	KJ1-3	KJ2-1	KJ2-2	KJ2-3
开裂点	1	1/294	1/567	1/650	1/1222	1/1065
	2	1/254	1/494	1/846	1/668	1/645
	3	1/223	1/550	1/868	1/724	1/855
屈服点	1	1/120	1/71	1/127	1/145	1/126
	2	1/108	1/117	1/143	1/103	1/94
	3	1/92	1/140	1/91	1/100	1/127
峰值荷载点	1	1/59	1/52	1/57	1/60	1/53
	2	1/62	1/43	1/45	1/53	1/45
	3	1/37	1/40	1/58	1/51	1/60
破坏点	1	1/22	1/29	1/25	1/26	1/26
	2	1/21	1/28	1/25	1/23	1/32
	3	1/18	1/13	1/15	1/16	1/16

[1]	JIN Feifei, SONG Fei, SHI Lei, et al. Influence Factors of Mechanical Properties of Geocell Retaining Wall Under Seismic Load [J]. Journal of South China University of Technology(Natural Science Edition), 2024, 52(7): 145-160.
[2]	JIANG Dongqi, WU Hao, FAN Jin. Study on Whole-Process Mechanical Behavior of Novel Spread Slab Beam Bridges [J]. Journal of South China University of Technology(Natural Science Edition), 2024, 52(1): 38-51.
[3]	JIAN Bin MING Yanghua LEI Chaoyi TANG Tiantian. A DDBD Seismic Design Method Based Double Substitute Structures [J]. Journal of South China University of Technology(Natural Science Edition), 2018, 46(9): 43-50.
[4]	Wu Kai Xue Jian-yang Zhao Hong-tie. Cooperation of Shape Steel and Concrete in SRC-RC Transfer Column [J]. Journal of South China University of Technology (Natural Science Edition), 2015, 43(7): 75-83.
[5]	He Ming-ji Wu Yi Cai Jian Huang Yan-sheng Yang Chun. IDA-Based Seismic Fragility Analysis of Transfer Frame with Energy Dissipation Haunch Braces [J]. Journal of South China University of Technology(Natural Science Edition), 2011, 39(12): 144-151.
[6]	Zhou Jing Cai Jian Fang Xiao-dan. Spectrum Analysis of Seismic Strength-Reduction Factor for RC Building [J]. Journal of South China University of Technology (Natural Science Edition), 2006, 34(2): 100-106.
[7]	. Response Modification Factors of Shear W alls in Diferent Performance Levels [J]. Journal of South China University of Technology (Natural Science Edition), 2006, 34(11): 81-86.
[8]	LIUFenTao WEIDeMing WUBo. Analysis of Seismic In fluence Coefficient of Structres with Active Variable Stiffness Systes#br# [J]. Journal of South China University of Technology(Natural Science Edition), 2003, 31(7): 52-57.