This paper investigates the retrofitting effect for a non-ductile reinforced concrete frame strengthened by perimeter steel moment frames with indirect connection, which ameliorates the direct connection’s problems. To this end, first, full-scale tests were conducted to address the structural behavior of a two-story reinforced concrete frame with non-seismic details (non-seismic specimen), and a WAS seismically strengthened frame (WAS specimen) per the Korean rehabilitation manual. The non-seismic specimen showed a maximum strength of 185.5 kN because the flexural-shear failure at the bottom end of columns on the first floor was governed, and shear cracks were concentrated at the beam-column joints on the second floor. The WAS specimen possessed more than 1.82 times lateral-resisting capacity. A considerable decrease in the number of cracks for the WAS specimen was observed, while there was the apparent appearance of the fracture pattern due to shear cracks. The lateral-resisting capacity of the non-seismic and WAS specimens might be reasonably determined per the reinforced columns’ specified shear strength following the distance to a critical section. The critical section for the WAS specimen was defined. The ultimate strength design methods for the non-seismic and WAS specimens based on the closed results versus the experimental results were proposed.

本文研究了采用间接连接的周边钢矩框架加强的非延性钢筋混凝土框架的改造效果，从而改善了直接连接的问题。为此，首先进行了全面测试，以解决两层钢筋混凝土框架的结构性能问题，该框架具有非地震细节（非地震标本）和根据韩国人的WAS抗震框架（WAS标本）康复手册。非地震样品的最大强度为185.5 kN，这是因为控制了第一层圆柱底端的弯曲剪切破坏，并且剪切裂缝集中在第二层的梁柱节点处。WAS标本具有超过1.82倍的横向抗力。观察到WAS试样的裂纹数量明显减少，而由于剪切裂纹而出现了明显的断裂模式。非地震和WAS试件的侧向抗力可以根据钢筋到钢筋混凝土柱的指定抗剪强度来确定，该抗剪强度遵循距临界段的距离。定义了WAS标本的关键部分。提出了基于封闭结果与实验结果的非地震和WAS标本极限强度设计方法。非地震和WAS试件的抗侧向能力可以根据钢筋到钢筋混凝土柱的指定抗剪强度，并根据到临界截面的距离来合理确定。定义了WAS标本的关键部分。提出了基于封闭结果与实验结果的非地震和WAS标本极限强度设计方法。非地震和WAS试件的侧向抗力可以根据钢筋到钢筋混凝土柱的指定抗剪强度来确定，该抗剪强度遵循距临界段的距离。定义了WAS标本的关键部分。提出了基于封闭结果与实验结果的非地震和WAS标本极限强度设计方法。